Rev 149 - May 30-Jun 29, 2011 - Helene, Distant Iapetus, mutual events |
Rev 149 - May 30-Jun 29, 2011 - Helene, Distant Iapetus, mutual events |
Jul 4 2011, 10:56 AM
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#76
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Solar System Cartographer Group: Members Posts: 10227 Joined: 5-April 05 From: Canada Member No.: 227 |
Very nice. I think that other face is the leading side as you say.
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 20 2017, 06:26 AM
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#77
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Member Group: Members Posts: 238 Joined: 15-January 13 Member No.: 6842 |
Just "discovered" Helene, what a peculiar-looking moon! Any idea what its surface gravity would be?
Here's my RGB composite from N00172891, N00172892, and N001728913 Enhanced saturation: A lot of work went into "massaging" the individual images into alignment, but there's still some colour fringing. -------------------- Curiosity rover panoramas: http://www.facebook.com/CuriosityRoverPanoramas
My Photosynth panoramas: http://photosynth.net/userprofilepage.aspx...;content=Synths |
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Feb 21 2017, 04:19 AM
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#78
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Senior Member Group: Members Posts: 2106 Joined: 13-February 10 From: Ontario Member No.: 5221 |
007 m/s2 from Wolfram Alpha: http://www.wolframalpha.com/input/?i=helene+surface+gravity
The equation is pretty simple to calculate oneself, though: g = G * M / r2. |
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