This library provides functionality to compute lunar positions and thus allowing contruction of lunar ephemerides.
It is based on semi-analytical theory ELP version ELP 2000-82B developed by M. Chapront-Touzé and J. Chapront at Bureau des Longitudes, Paris, France.
To find information on the theory itself, refer to the following original papers:
- M. Chapront-Touzé and J. Chapront. The lunar ephemeris ELP 2000. Astronomy and Astrophysics, vol. 124, 1983, pp. 50-62.
- M. Chapront-Touzé and J. Chapront. ELP 2000-85: a semi-analytical lunar ephemeris adequate for historical times. Astronomy and Astrophysics, vol. 190, 1988, pp. 342-352.
- Lunar Solution ELP 2000-82B. Explanatory note.
- J. Chapront and G. Francou. The lunar theory ELP revisited. Introduction of new planetary perturbations. Astronomy and Astrophysics, vol. 404, 2003, pp. 735-742.
As well as data files found through Vizier Catalog FTP service.
This library is implemented in C and needs be linked only against math library.
Provided files contain the following functionality
- elp2000-82b is the main file of interest. It contains routines that compute lunar positions depending on desired output coordinates and reference frame. Refer to the header comments for more information.
- arguments contains routines that compute arguments of the ELP theory. Among such, this file contains a routine to compute mean lunar arguments (Delaunay arguments), that may come in need while performing various lunar computations.
- series contains auxiliary routines that compute Fourier and Poisson series of the ELP theory.
- All other header files define arrays of coefficients of ELP theory and are of no practical use outside given library.
**If you find any errors or inconsistencies with this software, please contact me via [e-mail][2]**
Serhii Tsyba
18.08.2010
Helsinki, Finland