libnova.h		libnova.h
	skipping to change at line 19		skipping to change at line 19
	GNU General Public License for more details.		GNU General Public License for more details.
	You should have received a copy of the GNU General Public License		You should have received a copy of the GNU General Public License
	along with this program; if not, write to the Free Software		along with this program; if not, write to the Free Software
	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.		Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	Copyright (C) 2000 Liam Girdwood <liam@gnova.org>		Copyright (C) 2000 Liam Girdwood <liam@gnova.org>
	*/		*/
	/*! \mainpage libnova		/*! \mainpage libnova
			* \image html libnova-logo.jpg
	* Celestial Mechanics and Astronomical Calculation Library		* Celestial Mechanics and Astronomical Calculation Library
	*		*
	* \section intro Introduction		* \section intro Introduction
	* libnova is a general purpose, double precision, celestial mechanics and a stronomical calculation library.		* libnova is a general purpose, double precision, celestial mechanics and a stronomical calculation library.
	*		*
	* The intended audience of libnova is C / C++ programmers, astronomers and anyone else interested in calculating positions of astronomical objects or celestial mechanics.		* The intended audience of libnova is C / C++ programmers, astronomers and anyone else interested in calculating positions of astronomical objects or celestial mechanics.
	* libnova is the calculation engine used by the <A href="http://nova.sf.net ">Nova</A> project and most importantly, is free software.		* libnova is the calculation engine used by the <A href="http://nova.sf.net ">Nova</A> project and most importantly, is free software.
	*		*
	* \section features Features		* \section features Features
	* The current version of libnova can calculate:		* The current version of libnova can calculate:
	skipping to change at line 51		skipping to change at line 52
	* - Planetary Magnitude, illuminated disk and phase angle.		* - Planetary Magnitude, illuminated disk and phase angle.
	* - Lunar Position (using ELP82), phase angle.		* - Lunar Position (using ELP82), phase angle.
	* - Elliptic Motion of bodies (Asteroid + Comet positional and orbit data)		* - Elliptic Motion of bodies (Asteroid + Comet positional and orbit data)
	* - Asteroid + Comet magnitudes		* - Asteroid + Comet magnitudes
	* - Parabolic Motion of bodies (Comet positional data)		* - Parabolic Motion of bodies (Comet positional data)
	* - Orbit velocities and lengths		* - Orbit velocities and lengths
	* - Atmospheric refraction		* - Atmospheric refraction
	* - Rise, Set and Transit times.		* - Rise, Set and Transit times.
	* - Semidiameters of the Sun, Moon, Planets and asteroids.		* - Semidiameters of the Sun, Moon, Planets and asteroids.
	* - Angular separation of bodies		* - Angular separation of bodies
			* - Hyperbolic motion of bodies
	*		*
	* \section docs Documentation		* \section docs Documentation
	* API documentation for libnova is included in the source. It can also be f ound in this website and an offline tarball is available <A href="http://li bnova.sf.net/libnovadocs.tar.gz">here</A>.		* API documentation for libnova is included in the source. It can also be f ound in this website and an offline tarball is available <A href="http://li bnova.sf.net/libnovadocs.tar.gz">here</A>.
	*		*
	* \section download Download		* \section download Download
	* The latest released version of libnova is 0.9.0 and was released on the 2 5th Jan 2004.		* The latest released version of libnova is 0.10.0 and was released on the 1st June 2004.
	* It is available for download <A href="http://sf.net/project/showfiles.php ?group_id=57697">here.</A>		* It is available for download <A href="http://sf.net/project/showfiles.php ?group_id=57697">here.</A>
	*		*
	* \section cvs CVS		* \section cvs CVS
	* The latest CVS version of libnova is available via CVS <A href="http://sf .net/cvs/?group_id=57697">here.</A>		* The latest CVS version of libnova is available via CVS <A href="http://sf .net/cvs/?group_id=57697">here.</A>
	*		*
	* \section licence Licence		* \section licence Licence
	* libnova is released under the <A href="http://www.gnu.org">GNU</A> LGPL.		* libnova is released under the <A href="http://www.gnu.org">GNU</A> LGPL.
	*		*
	* \section help Help		* \section help Help
	* If you are interested in helping in the future development of libnova, th en please get in touch.		* If you are interested in helping in the future development of libnova, th en please get in touch.
	* Currently, we are needing help in the folowing areas.		* Currently, we are needing help in the folowing areas.
	* - Documentation. (Not just API reference, but also astronomy info for nov ice users)		* - Documentation. (Not just API reference, but also astronomy info for nov ice users)
	* - Programming (in C) astronomical solutions or algorithms.		* - Programming (in C) astronomical solutions or algorithms.
	* - Algorithms and Solutions.		* - Algorithms and Solutions.
	* - Website and logo.		* - Website and logo.
	*		*
	* \section contact Contact		* \section contact Contact
	* If you would like further information, then please contact me <A href="ma ilto:liam@gnova.org">here</A>		* If you would like further information, then please contact me <A href="ma ilto:liam@gnova.org">here</A>
			* Note: Email address has recently changed.
	*		*
	* Liam Girdwood		* Liam Girdwood
	*		*
	* \section thanks Thanks		* \section thanks Thanks
	* Thanks to Jean Meeus for most of the algorithms used in this library.		* Thanks to Jean Meeus for most of the algorithms used in this library.
	* From his book "Astronomical Algorithms".		* From his book "Astronomical Algorithms".
	*		*
	* Thanks to Michelle Chapront-Touze and Jean Chapront for publishing		* Thanks to Michelle Chapront-Touze and Jean Chapront for publishing
	* the Lunar Solution ELP 2000-82B.		* the Lunar Solution ELP 2000-82B.
	*		*
	* Thanks to Messrs. Bretagnon and Francou for publishing planetary		* Thanks to Messrs. Bretagnon and Francou for publishing planetary
	* solution VSOP87.		* solution VSOP87.
	*		*
	* Also thanks to Sourceforge for hosting this project. <A href="http://sour ceforge.net"> <IMG src="http://sourceforge.net/sflogo.php?group_id=57697&am p;type=5" width="210" height="62" border="0" alt="SourceForge Logo"></A>		* Also thanks to Sourceforge for hosting this project. <A href="http://sour ceforge.net"> <IMG src="http://sourceforge.net/sflogo.php?group_id=57697&am p;type=5" width="210" height="62" border="0" alt="SourceForge Logo"></A>
	*/		*/
	#ifndef LN_LIBNOVA_H		#ifndef _LN_LIBNOVA_H
	#define LN_LIBNOVA_H		#define _LN_LIBNOVA_H
	#ifdef __cplusplus
	extern "C" {
	#endif
	#include <time.h>
	/* define some usefull constants if they are not already defined */
	#ifndef M_PI_2
	#define M_PI_2 1.5707963267948966192313216916398
	#define M_PI_4 0.78539816339744830961566084581988
	#define M_PI 3.1415926535897932384626433832795
	#endif
	/*!
	** Date
	* \struct ln_date
	* \brief Human readable Date and time used by libnova
	*
	* This is the Human readable (easy printf) date format used
	* by libnova.
	*/
	struct ln_date
	{
	int years; /*!< Years. All values are valid */
	int months; /*!< Months. Valid values : 1 (January) - 12
	(December) */
	int days; /*!< Days. Valid values 1 - 28,29,30,31 Depends on m
	onth.*/
	int hours; /*!< Hours. Valid values 0 - 23. */
	int minutes; /*!< Minutes. Valid values 0 - 59. */
	double seconds; /*!< Seconds. Valid values 0 - 59.99999.... */
	};
	/*! \struct ln_dms
	** \brief Degrees, minutes and seconds.
	*
	* Human readable Angle in degrees, minutes and seconds
	*/
	struct ln_dms
	{
	int sign; /*!< Sign. 0 for positive, anything else is
	negative */
	int degrees; /*!< Degrees. Valid > 0 */
	int minutes; /*!< Minutes. Valid 0 - 59 */
	double seconds; /*!< Seconds. Valid 0 - 59.9999... */
	};
	/*! \struct ln_hms
	** \brief Hours, minutes and seconds.
	*
	* Human readable Angle in hours, minutes and seconds
	*/
	struct ln_hms
	{
	int hours; /*!< Hours. Valid 0 - 23 */
	int minutes; /*!< Minutes. Valid 0 - 59 */
	double seconds; /*!< Seconds. Valid 0 - 59.9999... */
	};
	/*! \struct lnh_equ_posn
	** \brief Right Acsension and Declination.
	*
	* Human readable Equatorial Coordinates.
	*/
	struct lnh_equ_posn
	{
	struct ln_hms ra; /*!< RA. Object right ascension.*/
	struct ln_dms dec; /*!< DEC. Object declination */
	};
	/*! \struct lnh_hrz_posn
	** \brief Azimuth and Altitude.
	*
	* Human readable Horizontal Coordinates.
	*/
	struct lnh_hrz_posn
	{
	struct ln_dms az; /*!< AZ. Object azimuth. */
	struct ln_dms alt; /*!< ALT. Object altitude. */
	};
	/*! \struct lnh_lnlat_posn
	** \brief Ecliptical (or celestial) Latitude and Longitude.
	*
	* Human readable Ecliptical (or celestial) Longitude and Latitude.
	*/
	struct lnh_lnlat_posn
	{
	struct ln_dms lng; /*!< longitude. Object longitude.*/
	struct ln_dms lat; /*!< latitude. Object latitude */
	};
	/*! \struct ln_equ_posn
	** \brief Equatorial Coordinates.
	*
	* The Right Ascension and Declination of an object.
	*
	* Angles are expressed in degrees.
	*/
	struct ln_equ_posn
	{
	double ra; /*!< RA. Object right ascension.*/
	double dec; /*!< DEC. Object declination */
	};
	/*! \struct ln_hrz_posn
	** \brief Horizontal Coordinates.
	*
	* The Azimuth and Altitude of an object.
	*
	* Angles are expressed in degrees.
	*/
	struct ln_hrz_posn
	{
	double az; /*!< AZ. Object azimuth. <p>
	0 deg = South, 90 deg = West, 180 deg = Nord, 270 deg = Ea
	st */
	double alt; /*!< ALT. Object altitude. <p> 0 deg = horizon, 90 d
	eg = zenit, -90 deg = nadir */
	};
	/*! \struct ln_lnlat_posn
	** \brief Ecliptical (or celestial) Longitude and Latitude.
	*
	* The Ecliptical (or celestial) Latitude and Longitude of and object.
	*
	* Angles are expressed in degrees.
	*/
	struct ln_lnlat_posn
	{
	double lng; /*!< longitude. Object longitude. */
	double lat; /*!< latitude. Object latitude */
	};
	/*! \struct ln_helio_posn
	* \brief Heliocentric position
	*
	* A heliocentric position is an objects position relative to the
	* centre of the Sun.
	*
	* Angles are expressed in degrees.
	* Radius vector is in AU.
	*/
	struct ln_helio_posn
	{
	double L; /*!< Heliocentric longitude */
	double B; /*!< Heliocentric latitude */
	double R; /*!< Heliocentric radius vector */
	};
	/*! \struct ln_rect_posn
	* \brief Rectangular coordinates
	*
	* Rectangular Coordinates of a body. These coordinates can be either
	* geocentric or heliocentric.
	*
	* A heliocentric position is an objects position relative to the
	* centre of the Sun.
	* A geocentric position is an objects position relative to the centre
	* of the Earth.
	*
	* Position is in units of AU for planets and in units of km
	* for the Moon.
	*/
	struct ln_rect_posn
	{
	double X; /*!< Rectangular X coordinate */
	double Y; /*!< Rectangular Y coordinate */
	double Z; /*!< Rectangular Z coordinate */
	};
	/*!
	* \struct ln_ell_orbit
	* \brief Elliptic Orbital elements
	*
	* TODO.
	* Angles are expressed in degrees.
	*/
	struct ln_ell_orbit
	{
	double a; /*!< Semi major axis, in AU */
	double e; /*!< Eccentricity */
	double i; /*!< Inclination in degrees */
	double w; /*!< Argument of perihelion in degrees */
	double omega; /*!< Longitude of ascending node in degrees*/
	double n; /*!< Mean motion, in degrees/day */
	double JD; /*!< Time of last passage in Perihelion, in julian d
	ay*/
	};
	/*!
	* \struct ln_par_orbit
	* \brief Parabolic Orbital elements
	*
	* TODO.
	* Angles are expressed in degrees.
	*/
	struct ln_par_orbit
	{
	double q; /*!< Perihelion distance in AU */
	double i; /*!< Inclination in degrees */
	double w; /*!< Argument of perihelion in degrees */
	double omega; /*!< Longitude of ascending node in degrees*/
	double JD; /*!< Time of last passage in Perihelion, in julian d
	ay */
	};
	/*!
	* \struct ln_rst_time
	* \brief Rise, Set and Transit times.
	*
	* Contains the Rise, Set and transit times for a body.
	*
	* Angles are expressed in degrees.
	*/
	struct ln_rst_time
	{
	double rise; /*!< Rise time in JD */
	double set; /*!< Set time in JD */
	double transit; /*!< Transit time in JD */
	};
	/*!
	* \struct ln_nutation
	* \brief Nutation in longitude, ecliptic and obliquity.
	*
	* Contains Nutation in longitude, obliquity and ecliptic obliquity.
	*
	* Angles are expressed in degrees.
	*/
	struct ln_nutation
	{
	double longitude; /*!< Nutation in longitude */
	double obliquity; /*!< Nutation in obliquity */
	double ecliptic; /*!< Obliquity of the ecliptic */
	};
	/*! \defgroup version Libnova library version information
	*/
	/*! \fn const char * get_ln_version (void)
	* \brief Library Version Number
	* \ingroup version
	*/
	const char * get_ln_version (void);
	/*! \defgroup calendar General Calendar Functions
	*/
	/*! \fn double get_julian_day (struct ln_date * date)
	* \ingroup calendar
	* \brief Calculate the julian day from date.
	*/
	double get_julian_day (struct ln_date * date);
	/*! \fn void get_date (double JD, struct ln_date * date)
	* \ingroup calendar
	* \brief Calculate the date from the julian day.
	*/
	void get_date (double JD, struct ln_date * date);
	/*! \fn void get_local_date (double JD, struct ln_date * date)
	* \ingroup calender
	* \brief Calculate the local date from the Julian day
	*/
	void get_local_date (double JD, struct ln_date * date);
	/*! \fn unsigned int get_day_of_week (struct ln_date * date)
	* \ingroup calendar
	* \brief Calculate day of the week.
	*/
	unsigned int get_day_of_week (struct ln_date *date);
	/*! \fn double get_julian_from_sys ()
	* \brief Calculate julian day from system time.
	* \ingroup calendar
	*/
	double get_julian_from_sys ();
	/*! \fn void get_ln_date_from_sys (struct ln_date * date)
	* \brief Calculate date from system date
	* \ingroup calendar
	*/
	void get_ln_date_from_sys (struct ln_date * date);
	/*! \fn double get_julian_from_timet (time_t * time)
	* \brief Calculate julian day from time_t
	* \ingroup calendar
	*/
	double get_julian_from_timet (time_t * in_time);
	/*! \fn void get_timet_from_julian (double JD, time_t * time)
	* \brief Calculate time_t from julian day
	* \ingroup calendar
	*/
	void get_timet_from_julian (double JD, time_t * in_time);
	/*! \fn double get_julian_local_date(struct ln_date* date)
	* \brief Calculate Julian day from local date
	* \ingroup calendar
	*/
	double get_julian_local_date(struct ln_date* date);
	/*! \fn int get_date_from_mpc (struct ln_date* date, char* mpc_date)
	* \brief Calculate the local date from the a MPC packed date.
	* \ingroup calendar
	*/
	int get_date_from_mpc (struct ln_date* date, char* mpc_date);
	/*! \fn double get_julian_from_mpc (char* mpc_date)
	* \brief Calculate the julian day from the a MPC packed date.
	* \ingroup calendar
	*/
	double get_julian_from_mpc (char* mpc_date);
	/*! \defgroup misc Misc Functions
	*/
	/*! \fn double get_dec_location(char * s)
	* \ingroup misc
	* \brief Obtains Latitude, Longitude, RA or Declination from a string.
	*/
	double get_dec_location(char *s);
	/*! \fn char * get_humanr_location(double location)
	* \ingroup misc
	* \brief Obtains a human readable location in the form: dd
	*/
	char *get_humanr_location(double location);
	/*!
	* \defgroup dynamical Dynamical Time
	*
	* TODO
	*/
	/*! \fn double get_dynamical_time_diff (double JD)
	* \ingroup dynamical
	* \brief Calculate approximate dynamical time difference from julian day in
	seconds
	*/
	double get_dynamical_time_diff (double JD);
	/*! \fn double get_jde (double JD)
	* \brief Calculate julian ephemeris day (JDE)
	* \ingroup dynamical
	*/
	double get_jde (double JD);
	/*! \defgroup sidereal Sidereal Time
	*
	* TODO
	*/
	/*! \fn double get_mean_sidereal_time (double JD)
	* \brief Calculate mean sidereal time from date.
	* \ingroup sidereal
	*/
	double get_mean_sidereal_time (double JD);
	/*! \fn get_apparent_sidereal_time (double JD)
	* \brief Calculate apparent sidereal time from date.
	* \ingroup sidereal
	*/
	double get_apparent_sidereal_time (double JD);
	/*! \defgroup misc Misc. Functions
	*
	* Misc functions.
	*/
	/*
	* \fn double get_rect_distance (struct ln_rect_posn * a, struct ln_rect_pos
	n * b)
	* \ingroup misc
	*/
	double get_rect_distance (struct ln_rect_posn * a, struct ln_rect_posn * b)
	;
	/*! \defgroup conversion General Conversion Functions
	*
	* Conversion from one libnova type to another.
	*/
	/*! \fn double rad_to_deg (double radians)
	* \brief radians to degrees
	* \ingroup conversion
	*/
	double rad_to_deg (double radians);
	/*! \fn double deg_to_rad (double radians)
	* \brief degrees to radians
	* \ingroup conversion
	*/
	double deg_to_rad (double degrees);
	/*! \fn double hms_to_deg (struct ln_hms * hms)
	* \brief hours to degrees
	* \ingroup conversion
	*/
	double hms_to_deg (struct ln_hms * hms);
	/*! \fn void deg_to_hms (double degrees, struct ln_hms * hms)
	* \brief degrees to hours
	* \ingroup conversion
	*/
	void deg_to_hms (double degrees, struct ln_hms * hms);
	/*! \fn double hms_to_rad (struct ln_hms * hms)
	* \brief hours to radians.
	* \ingroup conversion
	*/
	double hms_to_rad (struct ln_hms * hms);
	/*! \fn void deg_to_hms (double radians, struct ln_hms * hms)
	* \brief radians to hours
	* \ingroup conversion
	*/
	void rad_to_hms (double radians, struct ln_hms * hms);
	/*! \fn double dms_to_deg (struct ln_dms * dms)
	* \brief dms to degrees
	* \ingroup conversion
	*/
	double dms_to_deg (struct ln_dms * dms);
	/*! \fn void deg_to_dms (double degrees, struct ln_dms * dms)
	* \brief degrees to dms
	* \ingroup conversion
	*/
	void deg_to_dms (double degrees, struct ln_dms * dms);
	/*! \fn double dms_to_rad (struct ln_dms * dms)
	* \brief dms to radians
	* \ingroup conversion
	*/
	double dms_to_rad (struct ln_dms * dms);
	/*! \fn void rad_to_dms (double radians, struct ln_dms * dms)
	* \brief radians to dms
	* \ingroup conversion
	*/
	void rad_to_dms (double radians, struct ln_dms * dms);
	/*! \fn void hequ_to_equ (struct lnh_equ_posn * hpos, struct ln_equ_posn *
	pos)
	* \brief human readable equatorial position to double equatorial position
	* \ingroup conversion
	*/
	void hequ_to_equ (struct lnh_equ_posn * hpos, struct ln_equ_posn * pos);
	/*! \fn void equ_to_hequ (struct ln_equ_posn * pos, struct lnh_equ_posn * h
	pos)
	* \brief human double equatorial position to human readable equatorial posi
	tion
	* \ingroup conversion
	*/
	void equ_to_hequ (struct ln_equ_posn * pos, struct lnh_equ_posn * hpos);
	/*! \fn void hhrz_to_hrz (struct lnh_hrz_posn * hpos, struct ln_hrz_posn *
	pos)
	* \brief human readable horizontal position to double horizontal position
	* \ingroup conversion
	*/
	void hhrz_to_hrz (struct lnh_hrz_posn * hpos, struct ln_hrz_posn * pos);
	/*! \fn void hrz_to_hhrz (struct ln_hrz_posn * pos, struct lnh_hrz_posn * h
	pos)
	* \brief double horizontal position to human readable horizontal position
	* \ingroup conversion
	*/
	void hrz_to_hhrz (struct ln_hrz_posn * pos, struct lnh_hrz_posn * hpos);
	/*! \fn const char * hrz_to_nswe (struct ln_hrz_posn * pos);
	* \brief returns direction of given azimut - like N,S,W,E,NSW,...
	* \ingroup conversion
	*/
	const char * hrz_to_nswe (struct ln_hrz_posn * pos);
	/*! \fn void hlnlat_to_lnlat (struct lnh_lnlat_posn * hpos, struct ln_lnlat
	_posn * pos)
	* \brief human readable long/lat position to double long/lat position
	* \ingroup conversion
	*/
	void hlnlat_to_lnlat (struct lnh_lnlat_posn * hpos, struct ln_lnlat_posn *
	pos);
	/*! \fn void lnlat_to_hlnlat (struct ln_lnlat_posn * pos, struct lnh_lnlat_
	posn * hpos)
	* \brief double long/lat position to human readable long/lat position
	* \ingroup conversion
	*/
	void lnlat_to_hlnlat (struct ln_lnlat_posn * pos, struct lnh_lnlat_posn * h
	pos);
	/*! \fn void add_secs_hms (struct ln_hms * hms, double seconds)
	* \brief add seconds to hms
	* \ingroup conversion
	*/
	void add_secs_hms (struct ln_hms * hms, double seconds);
	/*! \fn void add_hms (struct ln_hms * source, struct ln_hms * dest)
	* \brief add hms to hms
	* \ingroup conversion
	*/
	void add_hms (struct ln_hms * source, struct ln_hms * dest);
	/*! \fn void range_degrees (double angle)
	* \brief puts a large angle in the correct range 0 - 360 degrees
	* \ingroup conversion
	*/
	double range_degrees (double angle);
	/*! \fn void range_radians (double angle)
	* \brief puts a large angle in the correct range 0 - 2PI radians
	* \ingroup conversion
	*/
	double range_radians (double angle);
	double range_radians2 (double angle);
	/*
	* \fn double get_light_time (double dist)
	* \brief Convert units of AU into light days.
	* \ingroup conversion
	*/
	double get_light_time (double dist);
	/*! \defgroup transform Transformation of Coordinates
	*
	* Transformations from one coordinate system to another.
	*/
	/*! \fn void get_hrz_from_equ (struct ln_equ_posn * object, struct ln_lnlat
	_posn * observer, double JD, struct ln_hrz_posn *position);
	* \brief Calculate horizontal coordinates from equatorial coordinates
	* \ingroup transform
	*/
	/* Use get_mean_sidereal_time, get_hrz_from_equ_siderealtime */
	void get_hrz_from_equ
	(struct ln_equ_posn * object,
	struct ln_lnlat_posn * observer,
	double JD, struct ln_hrz_posn *position);
	/*! \fn void get_hrz_from_equ_sidereal_time (struct ln_equ_posn * object, s
	truct ln_lnlat_posn * observer, double sidereal_time, struct ln_hrz_posn *p
	osition);
	* \brief Calculate horizontal coordinates from equatorial coordinates,
	* using mean sidereal time.
	* \ingroup transform
	*/
	/* Equ 12.5,12.6 pg 88 */
	void get_hrz_from_equ_sidereal_time
	(struct ln_equ_posn * object,
	struct ln_lnlat_posn * observer,
	double sidereal, struct ln_hrz_posn *position);
	/*! \fn void get_equ_from_ecl (struct ln_lnlat_posn * object, double JD, st
	ruct ln_equ_posn * position);
	* \brief Calculate equatorial coordinates from ecliptical coordinates
	* \ingroup transform
	*/
	/* Equ 12.3, 12.4 pg 89 */
	void get_equ_from_ecl
	(struct ln_lnlat_posn * object,
	double JD,
	struct ln_equ_posn * position);
	/*! \fn void get_ecl_from_equ (struct ln_equ_posn * object, double JD, stru
	ct ln_lnlat_posn * position);
	* \brief Calculate ecliptical cordinates from equatorial coordinates
	* \ingroup transform
	*/
	/* Equ 12.1, 12.2 Pg 88 */
	void get_ecl_from_equ
	(struct ln_equ_posn * object,
	double JD,
	struct ln_lnlat_posn * position);
	/*! \fn void get_equ_from_hrz (struct ln_hrz_posn *object, struct ln_lnlat_
	posn * observer, double JD, struct ln_equ_posn * position);
	* \brief Calculate equatorial coordinates from horizontal coordinates
	* \ingroup transform
	*/
	/* Pg 89 */
	void get_equ_from_hrz
	(struct ln_hrz_posn *object,
	struct ln_lnlat_posn * observer,
	double JD,
	struct ln_equ_posn * position);
	/*! \fn void get_rect_from_helio (struct ln_helio_posn *object, struct ln_r
	ect_posn * position);
	* \brief Calculate geocentric coordinates from heliocentric coordinates
	* \ingroup transform
	*/
	/* Pg ?? */
	void get_rect_from_helio
	(struct ln_helio_posn *object,
	struct ln_rect_posn * position);
	/*! \fn void get_ecl_from_rect (struct ln_rect_posn * rect, struct ln_lnlat
	_posn * posn)
	* \ingroup transform
	* Transform an objects rectangular coordinates into ecliptical coordinates.
	*/
	/* Equ 33.2
	*/
	void get_ecl_from_rect (struct ln_rect_posn * rect, struct ln_lnlat_posn *
	posn);
	/*! \defgroup VSOP87 VSOP87 Theory
	*
	* Thanks to Messrs. Bretagnon and Francou for publishing planetary
	* solution VSOP87.
	*/
	/*! \fn void vsop87_to_fk5 (struct ln_helio_posn * position, double JD);
	* \ingroup VSOP87
	* \brief Transform from VSOP87 to FK5 reference system.
	*/
	/* equation 31.3 Pg 207 */
	/* JD Julian Day */
	void vsop87_to_fk5 (struct ln_helio_posn * position, double JD);
	/*! \defgroup earth Earth
	*
	* Functions relating to the planet Earth.
	*
	* All angles are expressed in degrees.
	*/
	/*! \fn void get_earth_centre_dist (float height, double latitude, double *
	p_sin_o, double * p_cos_o);
	* \ingroup earth
	* \brief Calculate Earth globe centre distance.
	*/
	void get_earth_centre_dist (float height, double latitude, double * p_sin_o
	, double * p_cos_o);
	/*! \defgroup nutation Nutation
	*
	* Nutation is a period oscillation of the Earths rotational axis around it'
	s
	* mean position.
	*
	* All angles are expressed in degrees.
	*/
	/*! \fn void get_nutation (double JD, struct ln_nutation * nutation);
	* \ingroup nutation
	* \brief Calculate nutation.
	*/
	void get_nutation (double JD, struct ln_nutation * nutation);
	/*! \defgroup apparent Apparent position of a Star
	*
	* The apparent position of a star is it's position as seen from
	* the centre of the Earth.
	*
	* All angles are expressed in degrees.
	*/
	/*! \fn void get_apparent_posn (struct ln_equ_posn * mean_position, struct
	ln_equ_posn * proper_motion, double JD, struct ln_equ_posn * position);
	* \brief Calculate the apparent position of a star.
	* \ingroup apparent
	*/
	void get_apparent_posn
	(struct ln_equ_posn * mean_position,
	struct ln_equ_posn * proper_motion,
	double JD,
	struct ln_equ_posn * position);
	/*! \defgroup precession Precession.
	*
	* Precession is the changing direction of the Earth's rotational axis over
	time and
	* is due to the gravitational influence of the Sun and the Moon.
	*
	* All angles are expressed in degrees.
	*/
	/*! \fn void get_equ_prec (struct ln_equ_posn * mean_position, double JD, s
	truct ln_equ_posn * position);
	* \brief Calculate the effects of precession on equatorial coordinates.
	* \ingroup precession
	*/
	/* Equ 20.2, 20.3, 20.4 pg 126 */
	void get_equ_prec
	(struct ln_equ_posn * mean_position,
	double JD,
	struct ln_equ_posn * position);
	/*! \fn void get_ecl_prec (struct ln_lnlat_posn * mean_position, double JD,
	struct ln_lnlat_posn * position);
	* \brief Calculate the effects of precession on ecliptical coordinates.
	* \ingroup precession
	*/
	/* Equ 20.5, 20.6 pg 128 */
	void get_ecl_prec
	(struct ln_lnlat_posn * mean_position,
	double JD,
	struct ln_lnlat_posn * position);
	/*! \defgroup motion Proper Motion.
	* Proper motion is the motion in space of a star between 2 epochs. It has c
	omponents
	* in right ascension and in declination.
	*
	* All angles are expressed in degrees.
	*/
	/*! \fn void get_equ_pm (struct ln_equ_posn * mean_position, struct ln_equ_
	posn * proper_motion, double JD, struct ln_equ_posn * position);
	* \brief Calculate the proper motion of a star.
	* \ingroup motion
	*/
	/* Equ 20.2, 20.3, 20.4 pg 126 */
	void get_equ_pm
	(struct ln_equ_posn * mean_position,
	struct ln_equ_posn * proper_motion,
	double JD,
	struct ln_equ_posn * position);
	/*! \defgroup aberration Aberration
	*
	* Aberration: need a description.
	*
	* All angles are expressed in degrees.
	*/
	/*! \fn void get_equ_aber (struct ln_equ_posn * mean_position, double JD, s
	truct ln_equ_posn * position);
	* \brief Calculate equatorial coordinates with the effects of aberration.
	* \ingroup aberration
	*/
	/* Equ 22.1, 22.3, 22.4 and Ron-Vondrak expression */
	void get_equ_aber
	(struct ln_equ_posn * mean_position,
	double JD,
	struct ln_equ_posn * position);
	/*! \fn void get_ecl_aber (struct ln_lnlat_posn * mean_position, double JD,
	struct ln_lnlat_posn * position);
	* \brief Calculate ecliptical coordinates with the effects of aberration.
	* \ingroup aberration
	*/
	/* Equ 22.1, 22.2 pg 139 */
	void get_ecl_aber
	(struct ln_lnlat_posn * mean_position,
	double JD,
	struct ln_lnlat_posn * position);
	/*! \defgroup solar Solar.
	*
	* Calculate solar ecliptical/equatorial coordinates for a given julian date
	.
	* Accuracy 0.01 arc second error - uses VSOP87 solution.
	*
	* All angles are expressed in degrees.
	*/
	#define SOLAR_STANDART_HORIZONT -0.8333
	#define CIVIL_HORIZONT -6.0
	#define NAUTIC_HORIZONT -12.0
	#define ASTRONOMICAL_HORIZONT -18.0
	/*! \fn double get_solar_rst (double JD, struct ln_lnlat_posn * observer, s
	truct ln_rst_time * rst);
	* \brief Calculate the time of rise, set and transit for the Sun.
	* \ingroup solar
	*/
	int get_solar_rst_horizont (double JD, struct ln_lnlat_posn * observer, dou
	ble horizont, struct ln_rst_time * rst);
	/*! \fn double get_solar_rst (double JD, struct ln_lnlat_posn * observer, s
	truct ln_rst_time * rst);
	* \brief Calculate the time of rise, set and transit for the Sun.
	* \ingroup solar
	*/
	int get_solar_rst (double JD, struct ln_lnlat_posn * observer, struct ln_rs
	t_time * rst);
	/*! \fn void get_geom_solar_coords (double JD, struct ln_helio_posn * posit
	ion);
	* \brief Calculate solar geometric coordinates.
	* \ingroup solar
	*/
	void get_geom_solar_coords
	(double JD,
	struct ln_helio_posn * position);
	/*! \fn void get_equ_solar_coords (double JD, struct ln_equ_posn * position
	);
	* \brief Calculate apparent equatorial coordinates.
	* \ingroup solar
	*/
	void get_equ_solar_coords
	(double JD,
	struct ln_equ_posn * position);
	/*! \fn void get_ecl_solar_coords (double JD, struct ln_lnlat_posn * positi
	on);
	* \brief Calculate apparent ecliptical coordinates.
	* \ingroup solar
	*/
	void get_ecl_solar_coords
	(double JD,
	struct ln_lnlat_posn * position);
	/*! \fn void get_geo_solar_coords (double JD, struct ln_rect_posn * positio
	n)
	* \brief Calculate geocentric coordinates (rectangular)
	* \ingroup solar
	*/
	void get_geo_solar_coords (double JD, struct ln_rect_posn * position);
	/*! \fn double get_solar_sdiam (double JD)
	* \brief Calcaluate the semidiameter of the Sun in arc seconds.
	* \ingroup solar
	*/
	double get_solar_sdiam (double JD);
	/*! \defgroup mercury Mercury
	*
	* Functions relating to the planet Mercury.
	*
	* All angles are expressed in degrees.
	*/
	/*! \fn double get_mercury_sdiam (double JD)
	* \brief Calcaluate the semidiameter of Mercury in arc seconds.
	* \ingroup mercury
	*/
	double get_mercury_sdiam (double JD);
	/*! \fn double get_mercury_rst (double JD, struct ln_lnlat_posn * observer,
	struct ln_rst_time * rst);
	* \brief Calculate the time of rise, set and transit for Mercury.
	* \ingroup mercury
	*/
	int get_mercury_rst (double JD, struct ln_lnlat_posn * observer, struct ln_
	rst_time * rst);
	/*! \fn void get_mercury_helio_coords (double JD, struct ln_helio_posn * po
	sition);
	* \brief Calculate Mercury's heliocentric coordinates
	* \ingroup mercury
	*/
	/* Chapter 31 Pg 206-207 Equ 31.1 31.2 , 31.3 using VSOP 87 */
	void get_mercury_helio_coords
	(double JD,
	struct ln_helio_posn * position);
	/*! \fn void get_mercury_equ_coords (double JD, struct ln_equ_posn * positi
	on);
	* \brief Calculate Mercury's equatorial coordinates
	* \ingroup mercury
	*/
	/* Chapter 31 Pg 206-207 Equ 31.1 31.2 , 31.3 using VSOP 87 */
	void get_mercury_equ_coords
	(double JD,
	struct ln_equ_posn * position);
	/*! \fn double get_mercury_earth_dist (double JD);
	* \brief Calculate the distance between Mercury and the Earth.
	* \ingroup mercury
	* \return Distance in AU
	*/
	/* Chapter ?? */
	double get_mercury_earth_dist (double JD);
	/*! \fn double get_mercury_sun_dist (double JD);
	* \brief Calculate the distance between Mercury and the Sun in AU
	* \ingroup mercury
	* \return Distance in AU
	*/
	/* Chapter ?? */
	double get_mercury_sun_dist (double JD);
	/*! \fn double get_mercury_magnitude (double JD);
	* \brief Calculate the visible magnitude of Mercury
	* \ingroup mercury
	* \return Visible magnitude of Mercury
	*/
	/* Chapter ?? */
	double get_mercury_magnitude (double JD);
	/*! \fn double get_mercury_disk (double JD);
	* \brief Calculate the illuminated fraction of Mercury's disk
	* \ingroup mercury
	* \return Illuminated fraction of mercurys disk
	*/
	/* Chapter 41 */
	double get_mercury_disk (double JD);
	/*! \fn double get_mercury_phase (double JD);
	* \brief Calculate the phase angle of Mercury (Sun - Mercury - Earth)
	* \ingroup mercury
	* \return Phase angle of Mercury (degrees)
	*/
	/* Chapter 41 */
	double get_mercury_phase (double JD);
	/*! \fn void get_mercury_rect_helio (double JD, struct ln_rect_posn * posit
	ion)
	* \ingroup mercury
	* \brief Calculate Mercurys rectangular heliocentric coordinates.
	*/
	void get_mercury_rect_helio (double JD, struct ln_rect_posn * position);
	/*! \defgroup venus Venus
	*
	* Functions relating to the planet Venus.
	*
	* All angles are expressed in degrees.
	*/
	/*! \fn double get_venus_sdiam (double JD)
	* \brief Calcaluate the semidiameter of Venus in arc seconds.
	* \ingroup venus
	*/
	double get_venus_sdiam (double JD);
	/*! \fn double get_venus_rst (double JD, struct ln_lnlat_posn * observer, s
	truct ln_rst_time * rst);
	* \brief Calculate the time of rise, set and transit for Venus.
	* \ingroup venus
	*/
	int get_venus_rst (double JD, struct ln_lnlat_posn * observer, struct ln_rs
	t_time * rst);
	/*! \fn void get_venus_helio_coords (double JD, struct ln_helio_posn * posi
	tion);
	* \brief Calvulate Venus heliocentric coordinates
	* \ingroup venus
	*/
	/* Chapter 31 Pg 206-207 Equ 31.1 31.2 , 31.3 using VSOP 87 */
	void get_venus_helio_coords
	(double JD,
	struct ln_helio_posn * position);
	/*! \fn void get_venus_equ_coords (double JD, struct ln_equ_posn * position
	);
	* \brief Calculate Venus equatorial coordinates
	* \ingroup venus
	*/
	/* Chapter 31 Pg 206-207 Equ 31.1 31.2 , 31.3 using VSOP 87 */
	void get_venus_equ_coords
	(double JD,
	struct ln_equ_posn * position);
	/*! \fn double get_venus_earth_dist (double JD);
	* \brief Calculate the distance between Venus and the Earth.
	* \ingroup venus
	* \return Distance in AU
	*/
	/* Chapter ?? */
	double get_venus_earth_dist (double JD);
	/*! \fn double get_venus_sun_dist (double JD);
	* \brief Calculate the distance between Venus and the Sun.
	* \ingroup venus
	* \return Distance in AU
	*/
	/* Chapter ?? */
	double get_venus_sun_dist (double JD);
	/*! \fn double get_venus_magnitude (double JD);
	* \brief Calculate the visible magnitude of Venus
	* \ingroup venus
	* \return Visible magnitude of Venus
	*/
	/* Chapter ?? */
	double get_venus_magnitude (double JD);
	/*! \fn double get_venus_disk (double JD);
	* \brief Calculate the illuminated fraction of Venus disk
	* \ingroup venus
	* \return Illuminated fraction of Venus disk
	*/
	/* Chapter 41 */
	double get_venus_disk (double JD);
	/*! \fn double get_venus_phase (double JD);
	* \brief Calculate the phase angle of Venus.
	* \ingroup venus
	* \return Phase angle of Venus (degrees)
	*/
	/* Chapter 41 */
	double get_venus_phase (double JD);
	/*! \fn void get_venus_rect_helio (double JD, struct ln_rect_posn * positio
	n)
	* \ingroup venus
	* \brief Calculate Venus rectangular heliocentric coordinates.
	*/
	void get_venus_rect_helio (double JD, struct ln_rect_posn * position);
	/*
	** Earth
	*/
	/*! \fn void get_earth_helio_coords (double JD, struct ln_helio_posn * posi
	tion);
	* \brief Calculate Earth's heliocentric coordinates
	* \ingroup earth
	*/
	/* Chapter 31 Pg 206-207 Equ 31.1 31.2 , 31.3 using VSOP 87 */
	void get_earth_helio_coords
	(double JD,
	struct ln_helio_posn * position);
	/*! \fn void get_earth_sun_dist (double JD);
	* \brief Calculate the distance between Earth and the Sun.
	* \ingroup earth
	* \return Distance in AU
	*/
	/* Chapter ?? */
	double get_earth_sun_dist (double JD);
	/*! \fn void get_earth_rect_helio (double JD, struct ln_rect_posn * positio
	n)
	* \ingroup earth
	* \brief Calculate the Earths rectangular heliocentric coordinates.
	*/
	void get_earth_rect_helio (double JD, struct ln_rect_posn * position);
	/*! \defgroup mars Mars
	*
	* Functions relating to the planet Mars.
	*
	* All angles are expressed in degrees.
	*/
	/*! \fn double get_mars_sdiam (double JD)
	* \brief Calcaluate the semidiameter of Mars in arc seconds.
	* \ingroup mars
	*/
	double get_mars_sdiam (double JD);
	/*! \fn double get_mars_rst (double JD, struct ln_lnlat_posn * observer, st
	ruct ln_rst_time * rst);
	* \brief Calculate the time of rise, set and transit for Mars.
	* \ingroup mars
	*/
	int get_mars_rst (double JD, struct ln_lnlat_posn * observer, struct ln_rst
	_time * rst);
	/*! \fn void get_mars_helio_coords (double JD, struct ln_helio_posn * posit
	ion);
	* \brief Calculate Mars heliocentric coordinates
	* \ingroup mars
	*/
	/* Chapter 31 Pg 206-207 Equ 31.1 31.2 , 31.3 using VSOP 87 */
	void get_mars_helio_coords
	(double JD,
	struct ln_helio_posn * position);
	/*! \fn void get_mars_equ_coords (double JD, struct ln_equ_posn * position)
	;
	* \brief Calculate Mars equatorial coordinates
	* \ingroup mars
	*/
	/* Chapter 31 Pg 206-207 Equ 31.1 31.2 , 31.3 using VSOP 87 */
	void get_mars_equ_coords
	(double JD,
	struct ln_equ_posn * position);
	/*! \fn double get_mars_earth_dist (double JD);
	* \brief Calculate the distance between Mars and the Earth.
	* \ingroup mars
	* \return Distance in AU
	*/
	/* Chapter ?? */
	double get_mars_earth_dist (double JD);
	/*! \fn double get_mars_sun_dist (double JD);
	* \brief Calculate the distance between Mars and the Sun.
	* \ingroup mars
	* \return Distance in AU
	*/
	/* Chapter ?? */
	double get_mars_sun_dist (double JD);
	/*! \fn double get_mars_magnitude (double JD);
	* \brief Calculate the visible magnitude of Mars
	* \ingroup mars
	* \return Visible magnitude of Mars
	*/
	/* Chapter ?? */
	double get_mars_magnitude (double JD);
	/*! \fn double get_mars_disk (double JD);
	* \brief Calculate the illuminated fraction of Mars disk
	* \ingroup mars
	* \return Illuminated fraction of Mars disk
	*/
	/* Chapter 41 */
	double get_mars_disk (double JD);
	/*! \fn double get_mars_phase (double JD);
	* \brief Calculate the phase angle of Mars.
	* \ingroup mars
	* \return Phase angle of Mars (degrees)
	*/
	/* Chapter 41 */
	double get_mars_phase (double JD);
	/*! \fn void get_mars_rect_helio (double JD, struct ln_rect_posn * position
	)
	* \ingroup mars
	* \brief Calculate Mars rectangular heliocentric coordinates.
	*/
	void get_mars_rect_helio (double JD, struct ln_rect_posn * position);
	/*! \defgroup jupiter Jupiter
	*
	* Functions relating to the planet Jupiter.
	*
	* All angles are expressed in degrees.
	*/
	/*! \fn double get_jupiter_equ_sdiam (double JD)
	* \brief Calcaluate the eqatorial semidiameter of Jupiter in arc seconds.
	* \ingroup jupiter
	*/
	double get_jupiter_equ_sdiam (double JD);
	/*! \fn double get_jupiter_pol_sdiam (double JD)
	* \brief Calcaluate the polar semidiameter of Jupiter in arc seconds.
	* \ingroup jupiter
	*/
	double get_jupiter_pol_sdiam (double JD);
	/*! \fn double get_jupiter_rst (double JD, struct ln_lnlat_posn * observer,
	struct ln_rst_time * rst);
	* \brief Calculate the time of rise, set and transit for Jupiter.
	* \ingroup jupiter
	*/
	int get_jupiter_rst (double JD, struct ln_lnlat_posn * observer, struct ln_
	rst_time * rst);
	/*! \fn void get_jupiter_helio_coords (double JD, struct ln_helio_posn * po
	sition);
	* \brief Calculate Jupiter's heliocentric coordinates
	* \ingroup jupiter
	*/
	/* Chapter 31 Pg 206-207 Equ 31.1 31.2 , 31.3 using VSOP 87 */
	void get_jupiter_helio_coords
	(double JD, struct ln_helio_posn * position);
	/*! \fn void get_jupiter_equ_coords (double JD, struct ln_equ_posn * positi
	on);
	* \brief Calculate Jupiter's equatorial coordinates.
	* \ingroup jupiter
	*/
	/* Chapter 31 Pg 206-207 Equ 31.1 31.2 , 31.3 using VSOP 87 */
	void get_jupiter_equ_coords
	(double JD,
	struct ln_equ_posn * position);
	/*! \fn double get_jupiter_earth_dist (double JD);
	* \brief Calculate the distance between Jupiter and the Earth.
	* \ingroup jupiter
	* \return Distance in AU
	*/
	/* Chapter ?? */
	double get_jupiter_earth_dist (double JD);
	/*! \fn double get_jupiter_sun_dist (double JD);
	* \brief Calculate the distance between Jupiter and the Sun.
	* \ingroup jupiter
	* \return Distance in AU
	*/
	/* Chapter ?? */
	double get_jupiter_sun_dist (double JD);
	/*! \fn double get_jupiter_magnitude (double JD);
	* \brief Calculate the visible magnitude of Jupiter
	* \ingroup jupiter
	* \return Visible magnitude of Jupiter
	*/
	/* Chapter ?? */
	double get_jupiter_magnitude (double JD);
	/*! \fn double get_jupiter_disk (double JD);
	* \brief Calculate the illuminated fraction of Jupiter's disk
	* \ingroup jupiter
	* \return Illuminated fraction of Jupiter's disk
	*/
	/* Chapter 41 */
	double get_jupiter_disk (double JD);
	/*! \fn double get_jupiter_phase (double JD);
	* \brief Calculate the phase angle of Jupiter.
	* \ingroup jupiter
	* \return Phase angle of Jupiter (degrees)
	*/
	/* Chapter 41 */
	double get_jupiter_phase (double JD);
	/*! \fn void get_jupiter_rect_helio (double JD, struct ln_rect_posn * posit
	ion)
	* \ingroup jupiter
	* \brief Calculate Jupiters rectangular heliocentric coordinates.
	*/
	void get_jupiter_rect_helio (double JD, struct ln_rect_posn * position);
	/*! \defgroup saturn Saturn
	*
	* Functions relating to the planet Saturn.
	*
	* All angles are expressed in degrees.
	*/
	/*! \fn double get_saturn_equ_sdiam (double JD)
	* \brief Calcaluate the equatorial semidiameter of Saturn in arc seconds.
	* \ingroup saturn
	*/
	double get_saturn_equ_sdiam (double JD);
	/*! \fn double get_saturn_pol_sdiam (double JD)
	* \brief Calcaluate the polar semidiameter of Saturn in arc seconds.
	* \ingroup saturn
	*/
	double get_saturn_pol_sdiam (double JD);
	/*! \fn double get_saturn_rst (double JD, struct ln_lnlat_posn * observer,
	struct ln_rst_time * rst);
	* \brief Calculate the time of rise, set and transit for Saturn.
	* \ingroup saturn
	*/
	int get_saturn_rst (double JD, struct ln_lnlat_posn * observer, struct ln_r
	st_time * rst);
	/*! \fn void get_saturn_helio_coords (double JD, struct ln_helio_posn * pos
	ition);
	* \brief Calculate Saturn's heliocentric coordinates.
	* \ingroup saturn
	*/
	/* Chapter 31 Pg 206-207 Equ 31.1 31.2 , 31.3 using VSOP 87 */
	void get_saturn_helio_coords
	(double JD, struct ln_helio_posn * position);
	/*! \fn void get_saturn_equ_coords (double JD, struct ln_equ_posn * positio
	n);
	* \brief Calculate Saturn's equatorial coordinates.
	* \ingroup saturn
	*/
	/* Chapter 31 Pg 206-207 Equ 31.1 31.2 , 31.3 using VSOP 87 */
	void get_saturn_equ_coords
	(double JD,
	struct ln_equ_posn * position);
	/*! \fn double get_saturn_earth_dist (double JD);
	* \brief Calculate the distance between Saturn and the Earth.
	* \ingroup saturn
	* \return Distance in AU
	*/
	/* Chapter ?? */
	double get_saturn_earth_dist (double JD);
	/*! \fn double get_saturn_sun_dist (double JD);
	* \brief Calculate the distance between Saturn and the Sun.
	* \ingroup saturn
	* \return Distance in AU
	*/
	/* Chapter ?? */
	double get_saturn_sun_dist (double JD);
	/*! \fn double get_saturn_magnitude (double JD);
	* \brief Calculate the visible magnitude of Saturn
	* \ingroup saturn
	* \return Visible magnitude of Saturn
	*/
	/* Chapter ?? */
	double get_saturn_magnitude (double JD);
	/*! \fn double get_saturn_disk (double JD);
	* \brief Calculate the illuminated fraction of Saturn's disk
	* \ingroup saturn
	* \return Illuminated fraction of Saturn's disk
	*/
	/* Chapter 41 */
	double get_saturn_disk (double JD);
	/*! \fn double get_saturn_phase (double JD);
	* \brief Calculate the phase angle of Saturn.
	* \ingroup saturn
	* \return Phase angle of Saturn (degrees)
	*/
	/* Chapter 41 */
	double get_saturn_phase (double JD);
	/*! \fn void get_saturn_rect_helio (double JD, struct ln_rect_posn * positi
	on)
	* \ingroup saturns
	* \brief Calculate Saturns rectangular heliocentric coordinates.
	*/
	void get_saturn_rect_helio (double JD, struct ln_rect_posn * position);
	/*! \defgroup uranus Uranus
	*
	* Functions relating to the planet Uranus.
	*
	* All angles are expressed in degrees.
	*/
	/*! \fn double get_uranus_sdiam (double JD)
	* \brief Calcaluate the semidiameter of Uranus in arc seconds.
	* \ingroup uranus
	*/
	double get_uranus_sdiam (double JD);
	/*! \fn double get_uranus_rst (double JD, struct ln_lnlat_posn * observer,
	struct ln_rst_time * rst);
	* \brief Calculate the time of rise, set and transit for Uranus.
	* \ingroup uranus
	*/
	int get_uranus_rst (double JD, struct ln_lnlat_posn * observer, struct ln_r
	st_time * rst);
	/*! \fn void get_uranus_helio_coords (double JD, struct ln_helio_posn * pos
	ition);
	* \brief Calculate Uranus heliocentric coordinates
	* \ingroup uranus
	*/
	/* Chapter 31 Pg 206-207 Equ 31.1 31.2 , 31.3 using VSOP 87 */
	void get_uranus_helio_coords
	(double JD, struct ln_helio_posn * position);
	/*! \fn void get_uranus_equ_coords (double JD, struct ln_equ_posn * positio
	n);
	* \brief Calculate Uranus equatorial coordinates.
	* \ingroup uranus
	*/
	/* Chapter 31 Pg 206-207 Equ 31.1 31.2 , 31.3 using VSOP 87 */
	void get_uranus_equ_coords
	(double JD,
	struct ln_equ_posn * position);
	/*! \fn double get_uranus_earth_dist (double JD);
	* \brief Calculate the distance between Uranus and the Earth.
	* \ingroup uranus
	* \return Distance in AU
	*/
	/* Chapter ?? */
	double get_uranus_earth_dist (double JD);
	/*! \fn double get_uranus_sun_dist (double JD);
	* \brief Calculate the distance between Uranus and the Sun.
	* \ingroup uranus
	* \return Distance in AU
	*/
	/* Chapter ?? */
	double get_uranus_sun_dist (double JD);
	/*! \fn double get_uranus_magnitude (double JD);
	* \brief Calculate the visible magnitude of Uranus
	* \ingroup uranus
	* \return Visible magnitude of Uranus
	*/
	/* Chapter ?? */
	double get_uranus_magnitude (double JD);
	/*! \fn double get_uranus_disk (double JD);
	* \brief Calculate the illuminated fraction of Uranus's disk
	* \ingroup uranus
	* \return Illuminated fraction of Uranus disk
	*/
	/* Chapter 41 */
	double get_uranus_disk (double JD);
	/*! \fn double get_uranus_phase (double JD);
	* \brief Calculate the phase angle of Uranus.
	* \ingroup uranus
	* \return Phase angle of Uranus (degrees)
	*/
	/* Chapter 41 */
	double get_uranus_phase (double JD);
	/*! \fn void get_uranus_rect_helio (double JD, struct ln_rect_posn * positi
	on)
	* \ingroup uranus
	* \brief Calculate Uranus rectangular heliocentric coordinates.
	*/
	void get_uranus_rect_helio (double JD, struct ln_rect_posn * position);
	/*! \defgroup neptune Neptune
	*
	* Functions relating to the planet Neptune.
	*
	* All angles are expressed in degrees.
	*/
	/*! \fn double get_neptune_sdiam (double JD)
	* \brief Calcaluate the semidiameter of Neptune in arc seconds.
	* \ingroup neptune
	*/
	double get_neptune_sdiam (double JD);
	/*! \fn double get_neptune_rst (double JD, struct ln_lnlat_posn * observer,
	struct ln_rst_time * rst);
	* \brief Calculate the time of rise, set and transit for Neptune.
	* \ingroup neptune
	*/
	int get_neptune_rst (double JD, struct ln_lnlat_posn * observer, struct ln_
	rst_time * rst);
	/*! \fn void get_neptune_helio_coords (double JD, struct ln_helio_posn * po
	sition);
	* \brief Calculate Neptune's heliocentric coordinates.
	* \ingroup neptune
	*/
	/* Chapter 31 Pg 206-207 Equ 31.1 31.2 , 31.3 using VSOP 87 */
	void get_neptune_helio_coords
	(double JD, struct ln_helio_posn * position);
	/*! \fn void get_neptune_equ_coords (double JD, struct ln_equ_posn * positi
	on);
	* \brief Calculate Neptune's equatorial coordinates.
	* \ingroup neptune
	*/
	/* Chapter 31 Pg 206-207 Equ 31.1 31.2 , 31.3 using VSOP 87 */
	void get_neptune_equ_coords
	(double JD,
	struct ln_equ_posn * position);
	/*! \fn double get_neptune_earth_dist (double JD);
	* \brief Calculate the distance between Neptune and the Earth.
	* \ingroup neptune
	* \return Distance in AU
	*/
	/* Chapter ?? */
	double get_neptune_earth_dist (double JD);
	/*! \fn double get_neptune_sun_dist (double JD);
	* \brief Calculate the distance between Neptune and the Sun.
	* \ingroup neptune
	* \return Distance in AU
	*/
	/* Chapter ?? */
	double get_neptune_sun_dist (double JD);
	/*! \fn double get_neptune_magnitude (double JD);
	* \brief Calculate the visible magnitude of Neptune.
	* \ingroup neptune
	* \return Visisble magnitude of Neptune.
	*/
	/* Chapter ?? */
	double get_neptune_magnitude (double JD);
	/*! \fn double get_neptune_disk (double JD);
	* \brief Calculate the illuminated fraction of Neptune's disk.
	* \ingroup neptune
	* \return Illuminated fraction of Neptune's disk.
	*/
	/* Chapter 41 */
	double get_neptune_disk (double JD);
	/*! \fn double get_neptune_phase (double JD);
	* \brief Calculate the phase angle of Neptune.
	* \ingroup neptune
	* \return Phase angle of Neptune (degrees)
	*/
	/* Chapter 41 */
	double get_neptune_phase (double JD);
	/*! \fn void get_neptune_rect_helio (double JD, struct ln_rect_posn * posit
	ion)
	* \ingroup neptune
	* \brief Calculate Neptunes rectangular heliocentric coordinates.
	*/
	void get_neptune_rect_helio (double JD, struct ln_rect_posn * position);
	/*! \defgroup pluto Pluto
	*
	* Functions relating to the planet Pluto.
	*
	* All angles are expressed in degrees.
	*/
	/*! \fn double get_pluto_sdiam (double JD)
	* \brief Calcaluate the semidiameter of Pluto in arc seconds.
	* \ingroup pluto
	*/
	double get_pluto_sdiam (double JD);
	/*! \fn double get_pluto_rst (double JD, struct ln_lnlat_posn * observer, s
	truct ln_rst_time * rst);
	* \brief Calculate the time of rise, set and transit for Pluto.
	* \ingroup pluto
	*/
	int get_pluto_rst (double JD, struct ln_lnlat_posn * observer, struct ln_rs
	t_time * rst);
	/*! \fn void get_pluto_helio_coords (double JD, struct ln_helio_posn * posi
	tion);
	* \brief Calculate Pluto's heliocentric coordinates.
	* \ingroup pluto
	*/
	/* Chapter 37 Pg 263 */
	void get_pluto_helio_coords
	(double JD, struct ln_helio_posn * position);
	/*! \fn void get_pluto_equ_coords (double JD, struct ln_equ_posn * position
	);
	* \brief Calculate Pluto's equatorial coordinates.
	* \ingroup pluto
	*/
	/* Chapter 37 */
	void get_pluto_equ_coords
	(double JD,
	struct ln_equ_posn * position);
	/*! \fn double get_pluto_earth_dist (double JD);
	* \brief Calculate the distance between Pluto and the Earth.
	* \ingroup pluto
	* \return distance in AU
	*/
	/* Chapter 37 */
	double get_pluto_earth_dist (double JD);
	/*! \fn double get_pluto_sun_dist (double JD);
	* \brief Calculate the distance between Pluto and the Sun.
	* \ingroup pluto
	* \return Distance in AU
	*/
	/* Chapter 37 */
	double get_pluto_sun_dist (double JD);
	/*! \fn double get_pluto_magnitude (double JD);
	* \brief Calculate the visible magnitude of Pluto
	* \ingroup pluto
	* \return Visible magnitude of Pluto.
	*/
	/* Chapter 41 */
	double get_pluto_magnitude (double JD);
	/*! \fn double get_pluto_disk (double JD);
	* \brief Calculate the illuminated fraction of Pluto's disk
	* \ingroup pluto
	* \return Illuminated fraction of Pluto's disk
	*/
	/* Chapter 41 */
	double get_pluto_disk (double JD);
	/*! \fn double get_pluto_phase (double JD);
	* \brief Calculate the phase angle of Pluto.
	* \ingroup pluto
	* \return Phase angle of Pluto (degrees).
	*/
	/* Chapter 41 */
	double get_pluto_phase (double JD);
	/*! \fn void get_pluto_rect_helio (double JD, struct ln_rect_posn * positio
	n)
	* \ingroup pluto
	* \brief Calculate Plutos rectangular heliocentric coordinates.
	*/
	void get_pluto_rect_helio (double JD, struct ln_rect_posn * position);
	/*! \defgroup lunar Lunar
	*
	* Functions relating to the Moon.
	*
	* All angles are expressed in degrees.
	*/
	/*! \fn double get_lunar_sdiam (double JD)
	* \brief Calcaluate the semidiameter of the Moon in arc seconds.
	* \ingroup lunar
	*/
	double get_lunar_sdiam (double JD);
	/*! \fn double get_lunar_rst (double JD, struct ln_lnlat_posn * observer, s
	truct ln_rst_time * rst);
	* \brief Calculate the time of rise, set and transit for the Moon.
	* \ingroup lunar
	*/
	#define LUNAR_STANDART_HORIZONT 0.125
	int get_lunar_rst (double JD, struct ln_lnlat_posn * observer, struct ln_rs
	t_time * rst);
	/*! \fn void get_lunar_geo_posn (double JD, struct ln_rect_posn * moon, dou
	ble precision);
	* \brief Calculate the rectangular geocentric lunar cordinates.
	* \ingroup lunar
	*/
	/* ELP 2000-82B theory */
	void get_lunar_geo_posn (double JD, struct ln_rect_posn * moon, double prec
	ision);
	/*! \fn void get_lunar_equ_coords (double JD, struct ln_equ_posn * position
	, double precision);
	* \brief Calculate lunar equatorial coordinates.
	* \ingroup lunar
	*/
	void get_lunar_equ_coords
	(double JD,
	struct ln_equ_posn * position, double precision);
	/*! \fn void get_lunar_ecl_coords (double JD, struct ln_lnlat_posn * positi
	on, double precision);
	* \brief Calculate lunar ecliptical coordinates.
	* \ingroup lunar
	*/
	void get_lunar_ecl_coords
	(double JD,
	struct ln_lnlat_posn * position, double precision);
	/*! \fn double get_lunar_phase (double JD);
	* \brief Calculate the phase angle of the Moon.
	* \ingroup lunar
	*/
	double get_lunar_phase (double JD);
	/*! \fn double get_lunar_disk (double JD);
	* \brief Calculate the illuminated fraction of the Moons disk
	* \ingroup lunar
	*/
	double get_lunar_disk (double JD);
	/*! \fn double get_lunar_earth_dist (double JD);
	* \brief Calculate the distance between the Earth and the Moon.
	* \ingroup lunar
	*/
	double get_lunar_earth_dist (double JD);
	/*! \fn double get_lunar_bright_limb (double JD);
	* \brief Calculate the position angle of the Moon's bright limb.
	* \ingroup lunar
	*/
	double get_lunar_bright_limb (double JD);
	/*! \fn double get_lunar_long_asc_node (double JD);
	* \brief Calculate the longitude of the Moon's mean ascending node.
	* \ingroup lunar
	*/
	double get_lunar_long_asc_node (double JD);
	/*! \fn double get_lunar_long_perigee (double JD);
	* \brief Calculate the longitude of the Moon's mean perigee.
	* \ingroup lunar
	*/
	double get_lunar_long_perigee (double JD);
	/*! \defgroup elliptic Elliptic Motion
	*
	* Functions relating to the elliptic motion of bodies.
	*
	* All angles are expressed in degrees.
	*/
	/*! \fn double solve_kepler (double E, double M);
	* \brief Calculate the eccentric anomaly.
	* \ingroup elliptic
	*/
	double solve_kepler (double e, double M);
	/*! \fn double get_ell_mean_anomaly (double n, double delta_JD);
	* \brief Calculate the mean anomaly.
	* \ingroup elliptic
	*/
	double get_ell_mean_anomaly (double n, double delta_JD);
	/*! \fn double get_ell_true_anomaly (double e, double E);
	* \brief Calculate the true anomaly.
	* \ingroup elliptic
	*/
	double get_ell_true_anomaly (double e, double E);
	/*! \fn double get_ell_radius_vector (double a, double e, double E);
	* \brief Calculate the radius vector.
	* \ingroup elliptic
	*/
	double get_ell_radius_vector (double a, double e, double E);
	/*! \fn double get_ell_smajor_diam (double e, double q);
	* \brief Calculate the semi major diameter.
	* \ingroup elliptic
	*/
	double get_ell_smajor_diam (double e, double q);
	/*! \fn double get_ell_sminor_diam (double e, double a);
	* \brief Calculate the semi minor diameter.
	* \ingroup elliptic
	*/
	double get_ell_sminor_diam (double e, double a);
	/*! \fn double get_ell_mean_motion (double a);
	* \brief Calculate the mean daily motion (degrees/day).
	* \ingroup elliptic
	*/
	double get_ell_mean_motion (double a);
	/*! \fn void get_ell_geo_rect_posn (struct ln_ell_orbit* orbit, double JD,
	struct ln_rect_posn* posn);
	* \brief Calculate the objects rectangular geocentric position.
	* \ingroup elliptic
	*/
	void get_ell_geo_rect_posn (struct ln_ell_orbit* orbit, double JD, struct l
	n_rect_posn* posn);
	/*! \fn void get_ell_helio_rect_posn (struct ln_ell_orbit* orbit, double JD
	, struct ln_rect_posn* posn);
	* \brief Calculate the objects rectangular heliocentric position.
	* \ingroup elliptic
	*/
	void get_ell_helio_rect_posn (struct ln_ell_orbit* orbit, double JD, struct
	ln_rect_posn* posn);
	/*! \fn double get_ell_orbit_len (struct ln_ell_orbit * orbit);
	* \brief Calculate the orbital length in AU.
	* \ingroup elliptic
	*/
	double get_ell_orbit_len (struct ln_ell_orbit * orbit);
	/*! \fn double get_ell_orbit_vel (double JD, struct ln_ell_orbit * orbit);
	* \brief Calculate orbital velocity in km/s.
	* \ingroup elliptic
	*/
	double get_ell_orbit_vel (double JD, struct ln_ell_orbit * orbit);
	/*! \fn double get_ell_orbit_pvel (struct ln_ell_orbit * orbit);
	* \brief Calculate orbital velocity at perihelion in km/s.
	* \ingroup elliptic
	*/
	double get_ell_orbit_pvel (struct ln_ell_orbit * orbit);
	/*! \fn double get_ell_orbit_avel (struct ln_ell_orbit * orbit);
	* \ingroup elliptic
	* \brief Calculate the orbital velocity at aphelion in km/s.
	*/
	double get_ell_orbit_avel (struct ln_ell_orbit * orbit);
	/*! \fn double get_ell_body_phase_angle (double JD, struct ln_ell_orbit * o
	rbit);
	* \ingroup elliptic
	* \brief Calculate the pase angle of the body. The angle Sun - body - Earth
	.
	*/
	double get_ell_body_phase_angle (double JD, struct ln_ell_orbit * orbit);
	/*! \fn double get_ell_body_elong (double JD, struct ln_ell_orbit * orbit);
	* \ingroup elliptic
	* \brief Calculate the bodies elongation to the Sun..
	*/
	double get_ell_body_elong (double JD, struct ln_ell_orbit * orbit);
	/*!
	* \fn double get_ell_body_solar_dist (double JD, struct ln_ell_orbit * orbi
	t)
	* \brief Calculate the distance between a body and the Sun
	* \ingroup elliptic
	*/
	double get_ell_body_solar_dist (double JD, struct ln_ell_orbit * orbit);
	/*!
	* \fn double get_ell_body_earth_dist (double JD, struct ln_ell_orbit * orbi
	t)
	* \brief Calculate the distance between a body and the Earth
	* \ingroup elliptic
	*/
	double get_ell_body_earth_dist (double JD, struct ln_ell_orbit * orbit);
	/*!
	* \fn void get_ell_body_equ_coords (double JD, struct ln_ell_orbit * orbit,
	struct ln_equ_posn * posn)
	* \brief Calculate a bodies equatorial coords
	* \ingroup elliptic
	*/
	void get_ell_body_equ_coords (double JD, struct ln_ell_orbit * orbit, struc
	t ln_equ_posn * posn);
	/*! \fn double get_ell_body_rst (double JD, struct ln_lnlat_posn * observer
	, struct ln_ell_orbit * orbit, struct ln_rst_time * rst);
	* \brief Calculate the time of rise, set and transit for a body with an ell
	iptic orbit.
	* \ingroup elliptic
	*/
	int get_ell_body_rst (double JD, struct ln_lnlat_posn * observer, struct ln
	_ell_orbit * orbit, struct ln_rst_time * rst);
	/*!\fn double get_ell_last_perihelion (double epoch_JD, double M, double n)
	;
	* \brief Calculate the julian day of the last perihelion.
	* \ingroup elliptic
	*/
	double get_ell_last_perihelion (double epoch_JD, double M, double n);
	/*! \defgroup parabolic Parabolic Motion
	*
	* Functions relating to the Parabolic motion of bodies.
	*
	* All angles are expressed in degrees.
	*/
	/*! \fn double solve_barker (double q, double t);
	* \brief Solve Barkers equation.
	* \ingroup parabolic
	*/
	double solve_barker (double q, double t);
	/*! \fn double get_par_true_anomaly (double q, double t);
	* \ingroup parabolic
	* \brief Calculate the true anomaly.
	*/
	double get_par_true_anomaly (double q, double t);
	/*! \fn double get_par_radius_vector (double q, double t);
	* \ingroup parabolic
	* \brief Calculate the radius vector.
	*/
	double get_par_radius_vector (double q, double t);
	/*! \fn void get_par_geo_rect_posn (struct ln_par_orbit* orbit, double JD,
	struct ln_rect_posn* posn);
	* \ingroup parabolic
	* \brief Calculate an objects rectangular geocentric position.
	*/
	void get_par_geo_rect_posn (struct ln_par_orbit* orbit, double JD, struct l
	n_rect_posn* posn);
	/*! \fn void get_par_helio_rect_posn (struct ln_par_orbit* orbit, double JD
	, struct ln_rect_posn* posn);
	* \ingroup parabolic
	* \brief Calculate an objects rectangular heliocentric position.
	*/
	void get_par_helio_rect_posn (struct ln_par_orbit* orbit, double JD, struct
	ln_rect_posn* posn);
	/*!
	* \fn void get_par_body_equ_coords (double JD, struct ln_par_orbit * orbit,
	struct ln_equ_posn * posn)
	* \ingroup parabolic
	* \brief Calculate a bodies equatorial coordinates.
	*/
	void get_par_body_equ_coords (double JD, struct ln_par_orbit * orbit, struc
	t ln_equ_posn * posn);
	/*!
	* \fn double get_par_body_earth_dist (double JD, struct ln_par_orbit * orbi
	t)
	* \ingroup parabolic
	* \brief Calculate the distance between a body and the Earth.
	*/
	double get_par_body_earth_dist (double JD, struct ln_par_orbit * orbit);
	/*!
	* \fn double get_par_body_solar_dist (double JD, struct ln_par_orbit * orbi
	t)
	* \ingroup parabolic
	* \brief Calculate the distance between a body and the Sun.
	*/
	double get_par_body_solar_dist (double JD, struct ln_par_orbit * orbit);
	/*! \fn double get_par_body_phase_angle (double JD, struct ln_par_orbit * o
	rbit);
	* \ingroup parabolic
	* \brief Calculate the pase angle of the body.
	*/
	double get_par_body_phase_angle (double JD, struct ln_par_orbit * orbit);
	/*! \fn double get_par_body_elong (double JD, struct ln_par_orbit * orbit);
	* \ingroup parabolic
	* \brief Calculate the bodies elongation to the Sun.
	*/
	double get_par_body_elong (double JD, struct ln_par_orbit * orbit);
	/*! \fn double get_par_body_rst (double JD, struct ln_lnlat_posn * observer
	, struct ln_par_orbit * orbit, struct ln_rst_time * rst);
	* \brief Calculate the time of rise, set and transit for a body with a para
	bolic orbit.
	* \ingroup parabolic
	*/
	int get_par_body_rst (double JD, struct ln_lnlat_posn * observer, struct ln
	_par_orbit * orbit, struct ln_rst_time * rst);
	/*! \defgroup asteroid Asteroids
	*
	* Functions relating to Asteroids.
	*
	* All angles are expressed in degrees.
	*/
	/*!
	* \fn double get_asteroid_mag (double JD, struct ln_ell_orbit * orbit, doub
	le H, double G)
	* \ingroup asteroid
	* \brief Calculate the visual magnitude of an asteroid.
	*/
	double get_asteroid_mag (double JD, struct ln_ell_orbit * orbit, double H,
	double G);
	/*! \fn double get_asteroid_sdiam_km (double H, double A)
	* \brief Calcaluate the semidiameter of an asteroid in km.
	* \ingroup asteroid
	*/
	double get_asteroid_sdiam_km (double H, double A);
	/*! \fn double get_asteroid_sdiam_arc (double JD, struct ln_ell_orbit * orb
	it, double H, double A);
	* \brief Calcaluate the semidiameter of an asteroid in arc seconds.
	* \ingroup asteroid
	*/
	double get_asteroid_sdiam_arc (double JD, struct ln_ell_orbit * orbit, doub
	le H, double A);
	/*! \defgroup comet Comets
	*
	* Functions relating to Comets.
	*
	* All angles are expressed in degrees.
	*/
	/*!
	* \fn double get_ell_comet_mag (double JD, struct ln_ell_orbit * orbit, dou
	ble g, double k)
	* \ingroup comet
	* \brief Calculate the visual magnitude of a comet in an elliptic orbit.
	*/
	double get_ell_comet_mag (double JD, struct ln_ell_orbit * orbit, double g,
	double k);
	/*!
	* \fn double get_par_comet_mag (double JD, struct ln_par_orbit * orbit, dou
	ble g, double k)
	* \ingroup comet
	* \brief Calculate the visual magnitude of a comet in a parabolic orbit.
	*/
	double get_par_comet_mag (double JD, struct ln_par_orbit * orbit, double g,
	double k);
	/*! \defgroup refraction Atmospheric Refraction
	*
	* Functions relating to Atmospheric Refraction
	*
	* All angles are expressed in degrees.
	*/
	/*! \fn double get_refraction_adj (double altitude, double atm_pres, double
	temp)
	* \brief Calculate the adjustment in altitude of a body due to atmospheric
	* refraction.
	* \ingroup refraction
	*/
	double get_refraction_adj (double altitude, double atm_pres, double temp);
	/*! \fn double interpolate3 (double n, double y1, double y2, double y3)
	* \ingroup misc
	* \brief Calculate an intermediate value of the 3 arguments.
	*/
	double interpolate3 (double n, double y1, double y2, double y3);
	/*! \fn double interpolate5 (double n, double y1, double y2, double y3, dou
	ble y4, double y5)
	* \ingroup misc
	* \brief Calculate an intermediate value of the 5 arguments.
	*/
	double interpolate5 (double n, double y1, double y2, double y3, double y4,
	double y5);
	/*! \defgroup rst Rise, Set, Transit
	*
	* Functions relating to an objects rise, set and transit
	*
	* All angles are expressed in degrees.
	*/
	/*! \fn double get_object_rst (double JD, struct ln_lnlat_posn * observer,
	struct ln_equ_posn * object,struct ln_rst_time * rst);
	* \brief Calculate the time of rise, set and transit for an object not orbi
	ting the Sun.
	* \ingroup rst
	*/
	int get_object_rst (double JD, struct ln_lnlat_posn * observer, struct ln_e
	qu_posn * object, struct ln_rst_time * rst);
	/*! \fn double get_object_next_rst (double JD, struct ln_lnlat_posn * obser
	ver, struct ln_equ_posn * object,struct ln_rst_time * rst);
	* \brief Calculate the time of next rise, set and transit for an object not
	orbiting the Sun.
	* E.g. it's sure, that rise, set and transit will be in <JD, JD+1> range.
	* \ingroup rst
	*/
	int get_object_next_rst (double JD, struct ln_lnlat_posn * observer, struct
	ln_equ_posn * object, struct ln_rst_time * rst);
	#define STAR_STANDART_HORIZONT -0.5667
	int get_body_rst_horizont (double JD, struct ln_lnlat_posn * observer, void
	(*get_equ_body_coords) (double, struct ln_equ_posn *),
	double horizont, struct ln_rst_time * rst);
	/*! \defgroup angular Angular Separation
	*
	* Functions relating to an the angular separation and position
	* angle between 2 bodies.
	*
	* All angles are expressed in degrees.
	*/
	/*! \fn double get_angular_separation (struct ln_equ_posn* posn1, struct ln
	_equ_posn* posn2);
	* \brief Calculate the angular separation between 2 bodies
	* \ingroup angular
	*/
	double get_angular_separation (struct ln_equ_posn* posn1, struct ln_equ_pos
	n* posn2);
	/*! \fn double get_rel_posn_angle (struct ln_equ_posn* posn1, struct ln_equ
	_posn* posn2);
	* \brief Calculate the position angle between 2 bodies
	* \ingroup angular
	*/
	double get_rel_posn_angle (struct ln_equ_posn* posn1, struct ln_equ_posn* p
	osn2);
	#ifdef __cplusplus		#include <libnova/ln_types.h>
	};		#include <libnova/julian_day.h>
	#endif		#include <libnova/dynamical_time.h>
			#include <libnova/sidereal_time.h>
			#include <libnova/transform.h>
			#include <libnova/nutation.h>
			#include <libnova/aberration.h>
			#include <libnova/apparent_position.h>
			#include <libnova/solar.h>
			#include <libnova/precession.h>
			#include <libnova/proper_motion.h>
			#include <libnova/mercury.h>
			#include <libnova/venus.h>
			#include <libnova/earth.h>
			#include <libnova/mars.h>
			#include <libnova/jupiter.h>
			#include <libnova/saturn.h>
			#include <libnova/uranus.h>
			#include <libnova/neptune.h>
			#include <libnova/pluto.h>
			#include <libnova/vsop87.h>
			#include <libnova/lunar.h>
			#include <libnova/elliptic_motion.h>
			#include <libnova/asteroid.h>
			#include <libnova/comet.h>
			#include <libnova/parabolic_motion.h>
			#include <libnova/refraction.h>
			#include <libnova/rise_set.h>
			#include <libnova/angular_separation.h>
			#include <libnova/ln_types.h>
			#include <libnova/utility.h>
			#include <libnova/hyperbolic_motion.h>
	#endif		#endif
End of changes. 6 change blocks.
	2040 lines changed or deleted		38 lines changed or added

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