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Jul 15 2005, 04:26 PM

Post #1

Solar System Cartographer

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Here's one of the latest Rhea images showing the prominent ray crater.

Phil

--------------------

... because the Solar System ain't gonna map itself.

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Replies

Gsnorgathon View Member Profile	Jul 15 2005, 06:50 PM Post #2
Member Group: Members Posts: 260 Joined: 23-January 05 From: Seattle, WA Member No.: 156	I shamefully confess that I haven't given the matter much thought, but I still can't get over the fact that the ray crater doesn't look fresh to me. Am I missing something?

Bob Shaw View Member Profile	Jul 15 2005, 08:12 PM Post #3
Senior Member Group: Members Posts: 2488 Joined: 17-April 05 From: Glasgow, Scotland, UK Member No.: 239	QUOTE (Gsnorgathon @ Jul 15 2005, 07:50 PM) I shamefully confess that I haven't given the matter much thought, but I still can't get over the fact that the ray crater doesn't look fresh to me. Am I missing something? Phil: The surface certainly looks strange. There's a lot of craters with central peaks, and a lot of distinctly non-circular craters, too - the old 'Lunar grid' afficionados would have a field day! The population distribution seems a little odd. It looks to me like there's an underlying rolling and eroded landscape peppered with bigger craters, as if a well-gardened moon had suffered a series of periods of catastrophic impacts. The 'bright' impact crater isn't as bright as I'd have expected - the ejecta blanket is still very visible, but the relationship between ejecta blanket visiblity and rays seems somehow skewed as compared to our own Moon. Perhaps 'fresh' ejecta is subject to faster UV damage, sublimation, and/or micrometeoroid damage, and that's what we're seeing - a different sort of weathering... Of course, it could all be down to the filters on the camera! Just my 10 cents! Bob Shaw -------------------- Remember: Time Flies like the wind - but Fruit Flies like bananas!

Posts in this topic

Phil Stooke E2 Rhea Images Jul 15 2005, 04:26 PM

alan Some subtle horizontal streaks at 4 o'clock in... Jul 15 2005, 06:47 PM

Gsnorgathon I shamefully confess that I haven't given the ... Jul 15 2005, 06:50 PM

Bob Shaw QUOTE (Gsnorgathon @ Jul 15 2005, 07:50 PM)I ... Jul 15 2005, 08:12 PM

dvandorn QUOTE (Bob Shaw @ Jul 15 2005, 03:12 PM)...Th... Aug 19 2005, 07:33 AM

Bob Shaw other Doug: The only fly in the ointment with reg... Aug 19 2005, 12:50 PM

DEChengst Two simple mosaics made with the images from yeste... Jul 15 2005, 08:07 PM

Bob Shaw QUOTE (DEChengst @ Jul 15 2005, 09:07 PM)Two ... Jul 15 2005, 08:15 PM

Decepticon Is this a second basin? Or is this a cluster of cr... Aug 16 2005, 12:27 PM

Gsnorgathon QUOTE (Decepticon @ Aug 16 2005, 12:27 PM)Is ... Aug 19 2005, 10:50 PM

Decepticon Rhea map from Steves excellent Planetary Maps. h... Aug 16 2005, 12:29 PM

Rob Pinnegar That second basin on Rhea is visible in some of th... Aug 16 2005, 02:10 PM

tedstryk Will Cassini ever get good imagery of the cliffs o... Aug 17 2005, 01:10 PM

malgar Rhea craters... Elevation map extracted thanks to ... Aug 19 2005, 12:20 AM

Decepticon New update... http://photojournal.jpl.nasa.gov/cat... Aug 25 2005, 01:38 PM

Decepticon http://ciclops.org/view.php?id=1285 Sep 9 2005, 02:38 PM

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