4

Besides the official source for SPK files (ftp://ssd.jpl.nasa.gov/pub/eph ...) is there a place where people upload kernels for the smaller bodies in the solar system? I was looking for the Jupiter Trojans and other Trojans.

Thanks!

Kaushik Ghose
  • 990
  • 1
  • 8
  • 14
  • 2
    You might find some information here slightly interesting, although it's not what you are asking for https://space.stackexchange.com/a/19263/12102 especially the "required reading" page https://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/req/spk.html – uhoh Jul 11 '18 at 03:31
  • 1
    Also, according to this page, Comets & Asteroids: Ephemerides for comets and asteroids are available from JPL's HORIZONS system. SPK ephemeris files can also be custom generated using HORIZONS for use with JPL's NAIF SPICE toolkit. – uhoh Jul 11 '18 at 03:37
  • 1
    Doesn't the DE438s have a bunch of them? The GM parameter for them is in the comments at the start (names start with MA), but I do not know if the Chebyshev coefficients are also present for these items. – ChrisR Jul 11 '18 at 04:22
  • 1
    https://naif.jpl.nasa.gov/pub/naif/generic_kernels/spk/asteroids/ and https://ssd.jpl.nasa.gov/x/spk.html may or may not be helpful –  Jul 11 '18 at 13:48
  • Ok, reporting back on all the helpful answers here: https://ssd.jpl.nasa.gov/x/spk.html is great, gives SPK files, but a) only one body at a time b) the time range per file is heavily restricted - possibly for file size c) hard to find what range of data is available for a body d) documentation issues e) which is probably why its not so findable (like no inbound links). The telnet interface to Horizons is possibly the ticket. I have to learn that and will report back. – Kaushik Ghose Jul 27 '18 at 00:36

0 Answers0