Observation by Nick James: Artemis/Orion EM-1 at 375,000 km
Uploaded by
Nick James
Observer
Nick James
Observed
2022 Dec 07 - 21:30
Uploaded
2022 Dec 07 - 21:47
Objects
Spacecraft
Equipment
- ASI6200MM + Celestron HD11
Exposure
26x30s
Location
Chelmsford, UK
Target name
Artemis/Orion EM-1
Title
Artemis/Orion EM-1 at 375,000 km
About this image
Grant beat me to it (here) but here is my animation of the Orion capsule and ESA service module heading back to Earth. The position is close to the JPL Horizons prediction and the range is around 375,000 km.
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Comments
I think yours is a nicer picture though. I had to remove a sky background from each frame of mine before creating the gif. The result is rather nosy.
Your measurement suggests a mag brighter than last night. Will be even nearer tonight.
One query. Can I assume reentry is over the US so we won't see it? Its a hot arrival with a double "bounce" apparently. Does that put first bounce over the atlantic at 17:00ish?
Assuming no course corrections the astrometry we have shows contact with the Earth at at 11 Dec 2022 17:31:23.84 UTC at lat -20.82961 lon W122.42014:
https://projectpluto.com/pluto/mpecs/orion.htm
That's in the South Pacific. The splashdown will actually be off the coast of California. We get a good view of it right up to the night of December 10th.
As of 13:00 the JPL Horizons system seemed to be refusing to serve up a positional predictions.
Could you remind me how its possible to get a prediction for my Long/Lat from Project Pluto please.
Horizons is working for me but the other source is Bill Gray's pages:
https://projectpluto.com/pluto/mpecs/orion.htm
https://github.com/Bill-Gray/tles/blob/master/22156a.tle#L196
The second link gives you perturbed TLEs for each segment of the return path.
The artsat page here:
https://projectpluto.com/sat_eph.htm
Doesn't have Orion on it.
Thanks for all that. I shall try that link.
I tried Horizons again the next day and it worked fine. By chance I realised I had downloaded a 48hr prediction the day before, so I got Artemis again last night. Though things iced up after 1am.
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