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  • I have a question. I know VSOP87 is used for the planet modules, and ELP2000 for the Moon. Do you know what theories are used for the other modules (the minor planets, other moons, etc) ? This question is for versions up to 2016. I'm wanting to recreate ephems for these, but I don't know if they are just 2-body models or using JPL Horizon or DE ephems. Thanks.
    Chode,I saw missileman01 hired you for Grand Exploration,I also saw that he gave you the files for GEP. Are you still doing them? Or can I update it to 100830?
    Saw the mention of you having worked on the orbit equations for uranus. thanks for all you do for Orbiter.
    best
    rob mckenzie
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