Juno Perijove 58, February 3, 2024 |
Juno Perijove 58, February 3, 2024 |
Jan 4 2024, 05:21 PM
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#1
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Senior Member Group: Members Posts: 2542 Joined: 13-September 05 Member No.: 497 |
(Started a new thread to avoid cluttering up the PJ57 thread with PJ58 discussion.)
-------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Feb 6 2024, 03:58 AM
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#2
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Solar System Cartographer Group: Members Posts: 10226 Joined: 5-April 05 From: Canada Member No.: 227 |
We just recently had a first suggestion of an impact crater in old data:
https://eos.org/articles/amateur-astronomer...le-crater-on-io Juno would not be able to see craters like that one. Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PDF: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Feb 6 2024, 05:57 PM
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#3
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Member Group: Members Posts: 251 Joined: 14-January 22 Member No.: 9140 |
"Twenty-kilometer diameter craters are made by kilometer-size impactors; such events occur on a Galilean satellite about once in a million years."
https://pubmed.ncbi.nlm.nih.gov/11878353/ Io's surface is "no more than a couple of mission years old." I don't know what a fair extrapolation is for the rate of cratering for that could be seen in these images, but it seems like it would be very optimistic to hope to see one, and zero is the likeliest number. The ambiguity in appearance adds to the difficulty. (Even on Earth, the cause of origin of weathered, extant craters can be ambiguous, and we're not observing them from orbital distances!) |
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