Nightfall is an astronomy application for science, education, and fun. It can produce animated views of eclipsing binary stars, calculate synthetic lightcurves and radial velocity curves, and eventually determine the best-fit model for a given set of observational data of an eclipsing binary star system.
Nightfall comes with a user guide, and a set of observational data for several eclipsing binary star systems.
1.8627 Oct 2014 09:06
For the case of an elliptic orbit, the contact times and the conversion of stellar radii to absolute units have been fixed.