eclipsoid

Transit models for ellipsoidal planets in Jax

Eclipsoid is an extension of the jaxoplanet package for computing transits, occultations, and rotational light curves of bodies in orbit around each other, such as an exoplanet orbiting a host star. In eclipsoid, we extend jaxoplanet to model these bodies when the orbiting body is oblate or ellipsoidal. This is expected to be the case for any planet with a nonzero rotation rate, and can be a significant effect for long period exoplanets. In our own Solar system, Saturn is about 10% oblate, (i.e 10% squashed at the poles compared to at its equator), and Jupiter about 7%.

Refer to the jaxoplanet documentation for a primer on how to model light curves; our API largely follows jaxoplanet's.