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Unmanned Spaceflight.com > Outer Solar System > Saturn > Cassini Huygens > Cassini general discussion and science resultsDeath of a Spacecraft: The Unknown Fate of Cassini, Decision on Cassini's fate |
 Nov 8 2006, 12:23 PM
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 Member  Group: Members Posts: 370 Joined: 12-September 05 From: France Member No.: 495  |
Death of a Spacecraft: The Unknown Fate of Cassini
http://space.com/businesstechnology/061108_cassini_fate.html I like the Cassini Mercury crash option, even if unlikely. Rakhir |
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Nov 15 2006, 12:59 AM
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#2
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 Junior Member Group: Members Posts: 59 Joined: 25-December 05 From: Stevens Point, Wisconsin, USA Member No.: 619 |
Why dispose of Cassini as if it were some embarrassment or threat (it has been pointed out several times in this forum that Huygens was not sterilized when it landed on Titan)? We might want to retrieve it and put it in a museum some day. Yes, a long shot, but wouldn’t we appreciate it if one of Magellan’s ships had been saved for posterity?
Leave Cassini in a wide, distant orbit and let it watch Saturn until its RTGs run low in 2025 or 2030. |
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Nov 15 2006, 08:51 AM
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#3
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Member Group: Members Posts: 370 Joined: 12-September 05 From: France Member No.: 495 |
QUOTE (rogelio @ Nov 15 2006, 03:59 AM)  Why dispose of Cassini as if it were some embarrassment or threat (it has been pointed out several times in this forum that Huygens was not sterilized when it landed on Titan)? As explained previously, the problem is not the absence of sterilization but the combination of piggybacked microbes and long-lasting heat. Once Huygens batteries were dead, Huygens temperature reached quickly the temperature of Titan surface (around 94 K). At this temperature, the terrestrial microbes are unable to reproduce. It's not the same thing with Cassini. RTGs are designed to have chance to survive a launch failure so they may also reach the surface of Titan almost intact (and thus not fully sterilized by the heat of the entry). They will then produce a significant heat for many decades. |
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Rakhir Death of a Spacecraft: The Unknown Fate of Cassini Nov 8 2006, 12:23 PM
ugordan Yikes Rakhir, you should choose topic titles more ... Nov 8 2006, 12:42 PM
Rakhir QUOTE (ugordan @ Nov 8 2006, 03:42 PM) Yi... Nov 8 2006, 01:05 PM jsheff QUOTE (Rakhir @ Nov 8 2006, 08:05 AM) Ind... Nov 8 2006, 07:04 PM ugordan You're not suggesting MGS is dead, are you? Nov 8 2006, 07:21 PM jsheff QUOTE (ugordan @ Nov 8 2006, 02:21 PM) Yo... Nov 8 2006, 07:46 PM ugordan I wouldn't write MGS off just yet. This is ... Nov 8 2006, 07:52 PM jsheff QUOTE (Rakhir @ Nov 8 2006, 07:23 AM) Dea... Nov 8 2006, 07:34 PM Mariner9 It's been a long time since I got that A+ in O... Nov 8 2006, 09:47 PM Big_Gazza Does anyone seriously consider the possibility of ... Nov 9 2006, 12:07 AM Stephen QUOTE (Big_Gazza @ Nov 9 2006, 11:07 AM) ... Nov 9 2006, 01:55 AM ugordan Since Huygens wasn't sterilized, I can't s... Nov 9 2006, 08:01 AM Jim from NSF.com QUOTE (ugordan @ Nov 9 2006, 03:01 AM) Si... Nov 9 2006, 02:47 PM ugordan Huygens had 35 approximately 1 Watt radioisotope h... Nov 9 2006, 03:04 PM JRehling QUOTE (Big_Gazza @ Nov 8 2006, 04:07 PM) ... Nov 9 2006, 03:45 PM tasp Let's go to Chiron! Nov 9 2006, 03:03 PM stevesliva QUOTE (tasp @ Nov 9 2006, 10:03 AM) Let... Nov 9 2006, 07:09 PM Ant103 Maybe it's unprobable but, they can put Cassin... Nov 10 2006, 10:41 AM djellison No......it can use gravity assists to try and get ... Nov 10 2006, 12:38 PM ugordan What I'd like to know is how plausible these S... Nov 10 2006, 12:50 PM volcanopele QUOTE (ugordan @ Nov 10 2006, 05:50 AM) W... Nov 10 2006, 03:46 PM nprev Gotta admit, I like the Saturn system escape optio... Nov 10 2006, 03:04 PM Bjorn Jonsson QUOTE (nprev @ Nov 10 2006, 03:04 PM) Got... Nov 10 2006, 04:03 PM JRehling QUOTE (nprev @ Nov 10 2006, 07:04 AM) Got... Nov 10 2006, 05:47 PM nprev ...okay, well that's that, then. I'll be l... Nov 10 2006, 03:51 PM nprev Actually, I agree, Bjorn. However, wasn't ther... Nov 10 2006, 04:32 PM ugordan QUOTE (nprev @ Nov 10 2006, 05:32 PM) Wou... Nov 10 2006, 04:46 PM Stephen QUOTE (nprev @ Nov 11 2006, 03:32 AM) Wou... Nov 15 2006, 01:26 AM nprev QUOTE (Stephen @ Nov 14 2006, 05:26 PM) W... Nov 15 2006, 01:42 AM Sunspot I sure i remember Cassini manager Bob Mitchell tal... Nov 10 2006, 04:42 PM nprev Thanks, UG...I understand the situation much bette... Nov 10 2006, 05:02 PM Myran I am afraid that volcanopele most likely are right... Nov 10 2006, 07:34 PM Greg Hullender I've been impressed by Martin Lo's work on... Nov 10 2006, 10:00 PM tedstryk I think a big difference between Galileo and Cassi... Nov 10 2006, 10:10 PM ugordan Yeah, but Cassini needs to turn the HGA to Earth f... Nov 10 2006, 10:25 PM stellarlight Some questions:
Although it seems fascinating to ... Nov 13 2006, 04:24 PM ugordan 1. The RTGs should last for a while. Radioisotopes... Nov 13 2006, 04:33 PM JRehling QUOTE (stellarlight @ Nov 13 2006, 08:24 ... Nov 13 2006, 04:36 PM stevesliva QUOTE (JRehling @ Nov 13 2006, 11:36 AM) ... Nov 13 2006, 06:02 PM ugordan Just to give an example of just how hard it is to ... Nov 13 2006, 06:53 PM mchan QUOTE (JRehling @ Nov 13 2006, 08:36 AM) ... Nov 14 2006, 10:41 AM TritonAntares QUOTE (JRehling @ Nov 13 2006, 05:36 PM) ... Nov 14 2006, 11:50 PM djellison You need the Encounter MFD
http://www.orbitermar... Nov 13 2006, 08:32 PM ugordan Hm... and I thought TransX was the advanced one ou... Nov 13 2006, 08:36 PM djellison Trans X is all a bit complicated for me - the Enco... Nov 13 2006, 08:39 PM ugordan Yes, it's complicated and has a convoluted int... Nov 13 2006, 08:47 PM nprev Sounds interesting to me too, TritonAntares. Speak... Nov 15 2006, 12:14 AM nprev I appreciate your sentiments, but I'm actually... Nov 15 2006, 01:34 AM edstrick Something I don't know but would like to... If... Nov 15 2006, 10:16 AM djellison If one is truely worried about contaminating Enc o... Nov 15 2006, 10:28 AM Big_Gazza QUOTE (Rakhir @ Nov 15 2006, 07:51 PM) RT... Nov 15 2006, 10:53 AM ugordan Not to mention the impact speed at Enceladus would... Nov 15 2006, 11:41 AM Rakhir QUOTE (Big_Gazza @ Nov 15 2006, 01:53 PM)... Nov 15 2006, 11:51 AM dvandorn I will point out that the Apollo 13 situation isn... Nov 16 2006, 03:23 AM Greg Hullender QUOTE (dvandorn @ Nov 15 2006, 07:23 PM) ... Nov 16 2006, 04:15 AM helvick QUOTE (Greg Hullender @ Nov 16 2006, 04:1... Nov 16 2006, 12:37 PM Rakhir QUOTE (Greg Hullender @ Nov 16 2006, 07:1... Nov 16 2006, 01:55 PM dilo Only now I realized that, if they smash Cassini on... Nov 19 2006, 05:38 PM stevesliva QUOTE (Rakhir @ Nov 16 2006, 08:55 AM) Ju... Nov 20 2006, 04:20 PM nprev Hmm...Maybe the answer is a highly elliptical orbi... Nov 16 2006, 03:41 AM |
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