Function lupnt::MeanObliquity¶ Defined in File solar_system.cc Function Documentation¶ Real lupnt::MeanObliquity(Real mjd_tt)¶ Compute the mean obliquity of the ecliptic. Parameters: mjd_tt – Terrestrial Time (Modified Julian Date) Returns: Mean obliquity of the ecliptic O. Montenbruck and G. Eberhard, Satellite orbits: models, methods, and applications. Berlin : New York: Springer, 2000. doi: 10.1007/978-3-642-58351-3.