Reduction from stellar catalog coordinates to apparent positions, and ephemerides for double/variable stars.
Accurate ephemeris of stars are available using this package. The Bright Star Catalogue 5th and SkyMaster 2000 are directly available, and support for other catalogs is provided (Hipparcos, Tycho, and others). Reduction from catalog coordinates is performed applying different models and corrections, using the same objects as in planetary calculations. FK4/FK5/ICRF systems are supported for input/output coordinates.
Ephemerides for variable stars is also provided by means of the catalog by J.M. Kreiner (2004), and also ephemerides for double stars using the catalog of visual binary stars by Worley (1983) and Hartkopf (2006).