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"Dewdrop" spotted on Titan..? |
 Dec 16 2008, 07:15 AM
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 The Poet Dude  Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60  |
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Dec 17 2008, 04:14 PM
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 Senior Member Group: Members Posts: 2173 Joined: 28-December 04 From: Florida, USA Member No.: 132 |
The last 50km of the descent exposed Huygens to colder temperatures. I recollect that methane was evaporated from the surface by the 'hot' intake for the mass spectrometer. However, I expect that the rest of the probe's exterior was cold, being well insulated from the warm interior.
http://www.obspm.fr/actual/nouvelle/nov05/titan.en.shtml |
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Dec 17 2008, 04:36 PM
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 Senior Member Group: Members Posts: 3652 Joined: 1-October 05 From: Croatia Member No.: 523 |
Also, keep in mind that Huygens was thermally insulated pretty well so on the outside it could have conceivably cooled to ambient temperature.
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Dec 18 2008, 02:21 PM
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 Member Group: Members Posts: 614 Joined: 23-February 07 From: Occasionally in Columbia, MD Member No.: 1764 |
QUOTE (ugordan @ Dec 17 2008, 11:36 AM)  Also, keep in mind that Huygens was thermally insulated pretty well so on the outside it could have conceivably cooled to ambient temperature. exactly - see my analysis of the thermal interaction of Huygens with its environment http://www.lpl.arizona.edu/~rlorenz/huygens_thermal.pdf |
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Dec 18 2008, 07:41 PM
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Member Group: Members Posts: 688 Joined: 20-April 05 From: Sweden Member No.: 273 |
As far as I can see you estimate in the paper that the skin temperature of Huygens was 5 K above ambient at landing rising to "a few tens of K above ambient" which I should think would preclude condensation.
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Dec 19 2008, 02:48 PM
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Member Group: Members Posts: 614 Joined: 23-February 07 From: Occasionally in Columbia, MD Member No.: 1764 |
QUOTE (tty @ Dec 18 2008, 02:41 PM) As far as I can see you estimate in the paper that the skin temperature of Huygens was 5 K above ambient at landing rising to "a few tens of K above ambient" which I should think would preclude condensation. As long as a surface like the DISR baffle is cooler than the ground spot heated by the lamp you can have condensation |
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Stu "Dewdrop" spotted on Titan..? Dec 16 2008, 07:15 AM
tty Would methane dew really collect on Huygens? I wou... Dec 16 2008, 08:44 PM MahFL You know it's nice to remember we have picture... Dec 18 2008, 12:04 PM centsworth_II QUOTE (tty @ Dec 18 2008, 02:41 PM) As fa... Dec 19 2008, 08:14 AM |
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