0
$\begingroup$

The Themis spacecraft B and C have been renamed ARTEMIS P1 and P2 and moved around in cis-lunar space from Earth orbit to Lunar orbit.

This transfer involved libration point orbits, as discussed in the 2010 NASA news article ARTEMIS - The First Earth-Moon Libration Orbiter and can be seen in the cool orbit plots there, also shown below.

But the JPL Horizons web interface currently only shows the two spacecraft's lunar orbits from January to August 2017, specifically 2017-Jan-31 00:01 to 2017-Aug-03 00:01.

Are kernels for the cis-lunar acrobatics in 2010 available anywhere in the JPL's web site, or are these not publicly accessible?


enter image description here

above: "Illustration of Artemis-P1 liberations orbits. Credits: NASA/Goddard",

below: "Illustration of Artemis-P1 liberations orbits, side or ecliptic view. Credits: NASA/Goddard"

enter image description here

$\endgroup$
2
$\begingroup$

It was hosted on the Berkely SSL server.

Kernels located here: http://themis.ssl.berkeley.edu/data/themis/spice_kernels/

P.S: Thanks to David Stansby's HelioPy documentation.

$\endgroup$
  • $\begingroup$ Check /ephem/logs/<sc> where <sc> is the spacecraft name $\endgroup$ – ASRI_306 Jul 2 at 11:04
  • $\begingroup$ Just did, check this one. Should work. $\endgroup$ – ASRI_306 Jul 2 at 11:07
  • $\begingroup$ Excellent! Okay I'll fire up some old Python and try to read them, thank you! $\endgroup$ – uhoh Jul 2 at 11:09

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.