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T54 (May 5, 2009/Ref 110) |
 May 1 2009, 06:32 PM
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 Senior Member  Group: Moderator Posts: 2785 Joined: 10-November 06 From: Pasadena, CA Member No.: 1345  |
Flyby page is up (mission description not yet posted): http://saturn.jpl.nasa.gov/mission/flybys/titan20090505/
-------------------- Some higher resolution images available at my photostream: http://www.flickr.com/photos/31678681@N07/
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May 10 2009, 07:29 PM
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#2
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 Senior Member Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542 |
Maybe my original question wasn't clear. Since Titan is in eclipse presumably the main source of illumination, from the left, is sunlight scattered by the rings or bounced between rings and planet in some way as you say. Fine. I was asking about the illumination from the right that is allowing us to see the opposite limb. Presumably that is well within the anti-Saturn hemisphere so there should be no light arriving there at all from either rings or planet. Some very rough calculations tell me that, seen from Titan, Hyperion and Iapetus at their best are only about as bright as brightish stars so I don't think they are responsible. With the Sun behind Saturn the anti-Saturn hemisphere of Titan should be as dark as if it were in interstellar space. Are we really seeing this part of Titan imaged by starlight? That would be amazing enough. Until I know, I'll try not to think about alternatives . .
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Juramike T54 (May 5, 2009/Ref 110) May 1 2009, 06:32 PM
ngunn 'Looking ahead':
http://ciclops.org/view/5... May 2 2009, 07:51 AM Juramike From the Looking Ahead entry "This [ISS] mosa... May 2 2009, 01:45 PM ngunn Mission Description:
http://saturn.jpl.nasa.gov/fi... May 4 2009, 06:05 PM alan some images up, this one is interesting
http://sat... May 7 2009, 01:33 PM
MahFL Personally I have never been able to get excited a... May 7 2009, 03:03 PM Ian R Here's my attempt at processing a global view:... May 7 2009, 03:21 PM Ian R Here's another view of the southern hemisphere... May 9 2009, 09:27 PM ngunn Very nice! (and the previous). May 9 2009, 10:01 PM Juramike Image of Titan in eclipse with stars in the backgr... May 10 2009, 03:20 AM ngunn QUOTE (Juramike @ May 10 2009, 04:20 AM) ... May 10 2009, 08:08 AM Juramike Animated sequence of a stellar occultation of Tita... May 10 2009, 03:26 AM nprev I'd guess the rings; they're not completel... May 10 2009, 09:07 AM ngunn QUOTE (nprev @ May 10 2009, 10:07 AM) I... May 10 2009, 10:08 AM ugordan QUOTE (nprev @ May 10 2009, 11:07 AM) I... May 10 2009, 06:23 PM ugordan I can't find any plausible source except for P... May 10 2009, 07:55 PM rlorenz QUOTE (ngunn @ May 10 2009, 02:29 PM) Som... May 14 2009, 02:02 AM Ian R The latest view of Titan's southern hemisphere... May 10 2009, 09:33 PM ugordan May 10:
May 12 2009, 06:12 PM Phil Stooke Re: the illumination question - light refracted th... May 12 2009, 06:21 PM ngunn This is an amazingly stubborn issue - or is that ... May 12 2009, 10:16 PM Juramike Actually, the anti-Saturnian side of Titan can sti... May 12 2009, 11:03 PM ngunn Only if you're viewing from distance and looki... May 12 2009, 11:16 PM Juramike QUOTE (ngunn @ May 12 2009, 06:16 PM) Onl... May 13 2009, 01:05 AM john_s It should be possible to test the scattered-around... May 13 2009, 03:09 AM ugordan I was going to bring up the point about the bright... May 13 2009, 07:43 AM ngunn Thanks - it's great to have those authoritativ... May 14 2009, 07:32 AM rlorenz QUOTE (ngunn @ May 14 2009, 03:32 AM) Tha... May 14 2009, 11:00 PM remcook About the brightness ratio of dark side/illuminate... May 14 2009, 03:58 PM ngunn Believing it's starlight becomes quite painles... May 14 2009, 04:17 PM Jason W Barnes QUOTE (ngunn @ May 14 2009, 09:17 AM) Bel... May 14 2009, 04:47 PM ugordan QUOTE (Jason W Barnes @ May 14 2009, 06:4... May 14 2009, 05:33 PM ngunn QUOTE (Jason W Barnes @ May 14 2009, 05:4... May 16 2009, 07:27 AM ngunn Aha! The 'Looking ahead' for T55 tells... May 16 2009, 01:48 PM ngunn A note on the brightness of starlight. I found a p... May 16 2009, 03:00 PM volcanopele I should note that the list of potential sources o... May 16 2009, 07:47 PM ngunn Mention of atmospheric emissions sent me off to do... May 17 2009, 06:32 PM |
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