libnova  v 0.16.0
proper_motion.h
1 /*
2  * This library is free software; you can redistribute it and/or
3  * modify it under the terms of the GNU Lesser General Public
4  * License as published by the Free Software Foundation; either
5  * version 2 of the License, or (at your option) any later version.
6  *
7  * This library is distributed in the hope that it will be useful,
8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
10  * Lesser General Public License for more details.
11  *
12  * You should have received a copy of the GNU General Public License
13  * along with this program; if not, write to the Free Software
14  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
15  *
16  * Copyright (C) 2000 - 2005 Liam Girdwood
17  */
18 
19 #ifndef _LN_PROPER_MOTION_H
20 #define _LN_PROPER_MOTION_H
21 
22 #include <libnova/ln_types.h>
23 
24 #ifdef __cplusplus
25 extern "C" {
26 #endif
27 
39 /* Equ 20.2, 20.3, 20.4 pg 126 */
40 void LIBNOVA_EXPORT ln_get_equ_pm(struct ln_equ_posn *mean_position,
41  struct ln_equ_posn *proper_motion, double JD,
42  struct ln_equ_posn *position);
43 
47 /* Equ 20.2, 20.3, 20.4 pg 126
48 */
49 void LIBNOVA_EXPORT ln_get_equ_pm_epoch(struct ln_equ_posn *mean_position,
50  struct ln_equ_posn *proper_motion, double JD, double epoch_JD,
51  struct ln_equ_posn *position);
52 
53 #ifdef __cplusplus
54 };
55 #endif
56 
57 #endif
void LIBNOVA_EXPORT ln_get_equ_pm(struct ln_equ_posn *mean_position, struct ln_equ_posn *proper_motion, double JD, struct ln_equ_posn *position)
Calculate a stars equatorial position wrt proper motion (J2000).
Definition: proper_motion.c:37
Equatorial Coordinates.
Definition: ln_types.h:176