Le 06/03/2014 14:50, Evan Ward a écrit : > Hi, Hi Evan, > > Does Orekit provide a reference frame aligned with the ecliptic? Maybe I > just missed it, but I couldn't find one in the FramesFactory or the > CelestialBodyFactory. No. We have the ICRF which is centered at solar system barycenter, but it is aligned with EME2000, not ecliptic. best regards, Luc > > Best Regards, > Evan >