libnova
v 0.16.0

Celestial Mechanics, Astrometry and Astrodynamics Library
libnova is a general purpose, double precision, Celestial Mechanics, Astrometry and Astrodynamics library.
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 Nova project and most importantly, is free software.
The current version of libnova can calculate:
API documentation for libnova is included in the source. It can also be found in this website and an offline tarball is available here.
The latest released version of libnova is 0.15.0 It is available for download here.
The latest GIT version of libnova is available via GIT here.
libnova is released under the GNU LGPL.
If you are interested in helping in the future development of libnova, then please get in touch. Currently, we are needing help in the folowing areas.
libnova is maintained by Liam Girdwood and Petr Kubanek.
Thanks to Jean Meeus for most of the algorithms used in this library. From his book "Astronomical Algorithms".
Thanks to Michelle ChaprontTouze and Jean Chapront for publishing the Lunar Solution ELP 200082B.
Thanks to Messrs. Bretagnon and Francou for publishing planetary solution VSOP87.