Rev 149 - May 30-Jun 29, 2011 - Helene, Distant Iapetus, mutual events |
Unmanned Spaceflight.com > Outer Solar System > Saturn > Cassini Huygens > Cassini's ongoing mission and raw images  |
Rev 149 - May 30-Jun 29, 2011 - Helene, Distant Iapetus, mutual events |
 Jun 20 2011, 04:38 PM
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#46
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 Senior Member  Group: Moderator Posts: 2785 Joined: 10-November 06 From: Pasadena, CA Member No.: 1345  |
To me, it looks like ring material is coating up and loading onto the surface. Then at some point, it releases and makes an avalanche that fills into the basin.
Trying to get a sense of scale, this is about the size of a big avalanche chute on Earth, but I imagine the whole motion being much gentler due to the really low gravity. -------------------- Some higher resolution images available at my photostream: http://www.flickr.com/photos/31678681@N07/
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Jun 20 2011, 04:47 PM
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#47
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 Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
QUOTE (Juramike @ Jun 20 2011, 06:38 PM)  To me, it looks like ring material is coating up and loading onto the surface. Looking at Ian's atlas, it does seem to be the case that the leading hemisphere is smooth, while the trailing is heavily cratered. My guess would be small impacts over time causing quakes to shake material down slope. I wonder if the trailing hemisphere is spectrally redder as a consequence. -------------------- |
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Jun 20 2011, 05:17 PM
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#48
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 Junior Member Group: Members Posts: 57 Joined: 22-March 09 From: West Hartford, Connecicut Member No.: 4691 |
Amazing image and interesting craters and errosion of the surface.
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Jun 20 2011, 06:30 PM
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#49
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 Member Group: Members Posts: 655 Joined: 22-January 06 Member No.: 655 |
Awesome with a capital 'awe'
I've been looking forward to this flyby for a couple of months. I get home from work hoping to browse the raw images; and come here first to find that not only was the camera pointing inch-perfect, but the raw images have been enhanced and stacked, there's a cross-eye stereo view to enjoy, and even a flyby movie on 'You tube' Phenomenal work everybody!! I'm sure there's a little detail to be teased out courtesy of saturnshine too.....  |
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Jun 20 2011, 06:43 PM
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#50
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Member Group: Members Posts: 128 Joined: 28-October 08 From: Boston, MA Member No.: 4469 |
Incredible. Thanks again and again to the Cassini team and all of the image mavens here for providing the rest of us with a seemingly endless chain of such awe inspiring moments. Longest day of the year (almost), and I have a sudden yearning for winter.
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Jun 20 2011, 06:52 PM
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#51
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 Member Group: Members Posts: 754 Joined: 9-February 07 Member No.: 1700 |
Looks kinda like a used painting sponge:
Attached image(s)
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Jun 20 2011, 07:39 PM
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#52
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Solar System Cartographer Group: Members Posts: 10153 Joined: 5-April 05 From: Canada Member No.: 227 |
No, that's Hyperion!
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 PD: 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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Jun 20 2011, 09:22 PM
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#53
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 Member Group: Members Posts: 259 Joined: 23-January 05 From: Seattle, WA Member No.: 156 |
I'd love a hi-res enough view to do a good comparison of Helene's flow features with Martian gullies.
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Jun 20 2011, 10:07 PM
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#54
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 Member Group: Members Posts: 813 Joined: 29-December 05 From: NE Oh, USA Member No.: 627 |
Thanks CASSINI and UMSF image mages....
Agree with Juramike and ugordan. Think this is some ring particle loading phenomenon. Whatever.... man... is she beautiful!!!! Craig |
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Jun 20 2011, 10:20 PM
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#55
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 The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
Good... ***grief***...
Just got back from a day in Blackpool (bought some rock, ate some ice cream, met some daleks, as you do) and went online to see what I've missed - Look at THAT!!! I'll say it too: great work everyone who worked on these images. Just brilliant processing and "citizen science" (hate that term but it seems to have stuck... oh well...) See, DAWN team? See what happens when you release your images quickly and generously? People like those here treat them with care and admiration and use them to create works of art and wonder, which get other people buzzing like bees on crack about your mission! Stop ****ing about and let those pictures fly free!! 
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Jun 21 2011, 01:56 AM
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#56
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 Merciless Robot Group: Admin Posts: 8783 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Stu: Well said!!!!!!!!!!!!!!!!!!!!!!!!
Helene:  !!! GREAT work, everyone!After seeing this, I'm beginning to wonder if Cassini herself might glaze over in a few years! -------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Jun 21 2011, 04:48 AM
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#57
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 Senior Member Group: Admin Posts: 3108 Joined: 21-December 05 From: Canberra, Australia Member No.: 615 |
I'm just blown away by the subtlety of the light in this image - the first frame in Cassini's Helene sequence - image N00172780.
Does anyone know if the light shining at the bottom of the frame is Saturn's limb/terminator, a moon or some other feature? Is the planet part of the background? Also, with an eXtreme contrast stretch (right), Helene's body comes out of the darkness
BTW, nice job everyone of the images produced so far. Cassini's own image release is here and the same from JPL here. |
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Jun 21 2011, 05:55 AM
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#58
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Founder Group: Chairman Posts: 14432 Joined: 8-February 04 Member No.: 1 |
QUOTE (Astro0 @ Jun 20 2011, 09:48 PM) Does anyone know if the light shining at the bottom of the frame is Saturn's limb/terminator, a moon or some other feature? Is the planet part of the background? Eyes on the Solar System has predicted trajectory (but not pointing) for this - and looking at the geometry, I think it's the limb of Saturn, The 'darkness' you have, is the night side of Saturn. C/A was well after that and the dark side of Saturn was no longer in the FOV. |
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Jun 21 2011, 10:58 AM
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#59
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Senior Member Group: Moderator Posts: 2785 Joined: 10-November 06 From: Pasadena, CA Member No.: 1345 |
I wonder if the color changes on the surface are a grain-size phenomenon? Fine coating --> lumpy bigger grained avalanche debris
or grains on the surface slowly subliming-redepositing to get bigger grains, then getting ground down to dust during the avalanche event? (initial Fine coating --> bigger recrystallized grains --> avalanche dust). Hyperion also has the same kinda look. Anyone know if VIMS also got images? -------------------- Some higher resolution images available at my photostream: http://www.flickr.com/photos/31678681@N07/
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Jun 21 2011, 11:16 AM
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#60
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
QUOTE (Juramike @ Jun 21 2011, 12:58 PM) Anyone know if VIMS also got images? Even if it did, the pixels would be so large you would have trouble landing one on just the darker or bright stuff. -------------------- |
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