The Grand Finale, Proximal orbits |
The Grand Finale, Proximal orbits |
Sep 18 2017, 08:34 PM
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#121
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Senior Member Group: Members Posts: 2530 Joined: 20-April 05 Member No.: 321 |
This juncture might be a time to remember that extended mission concepts once proposed for Cassini included going into Titan orbit or leaving Saturn orbit and journeying to Uranus. It sounded like the first was infeasible and the second simply unwise.
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Sep 18 2017, 11:52 PM
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#122
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Senior Member Group: Members Posts: 2106 Joined: 13-February 10 From: Ontario Member No.: 5221 |
Yep, I remember the idea of Cassini ending up in Titan orbit from both a Stephen Baxter novel, and some speculation on how it could be accomplished in this very forum, circa 2004! ( http://www.unmannedspaceflight.com/index.php?showtopic=559 ). I still do wonder how plausible the main antenna as a heat shield would be...
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Sep 19 2017, 01:48 PM
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#123
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Senior Member Group: Members Posts: 1592 Joined: 14-October 05 From: Vermont Member No.: 530 |
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Sep 19 2017, 03:20 PM
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#124
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Senior Member Group: Members Posts: 2530 Joined: 20-April 05 Member No.: 321 |
I don't think the Uranus option ever made much sense. It would have cost a lot of Saturn science and created a huge and risky delay before arrival at Uranus. If anything, it was more of an impressive statement of possibilities.
Of course, in some alternate reality, alternate versions of us in 2029 will say, "Wow, if Cassini hadn't been sent to Uranus, we never would have known about _______!" |
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Sep 19 2017, 08:08 PM
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#125
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Member Group: Members Posts: 655 Joined: 22-January 06 Member No.: 655 |
I don't think the Uranus option ever made much sense. It would have cost a lot of Saturn science and created a huge and risky delay before arrival at Uranus. If anything, it was more of an impressive statement of possibilities. Agreed. I think the right decision was made - a 'free' atmosphere probe at Saturn (although not optimised as such) will surely pay dividends. With Uranus' axial tilt also, flyby science would have been shoehorned into the relatively brief period a couple of days either side of closest approach. It's more than a pity however that an almost perfectly-operational spacecraft had to be disposed of for want of fuel. As ever, it's all in the delta V.... |
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Sep 19 2017, 08:25 PM
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#126
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Senior Member Group: Members Posts: 2106 Joined: 13-February 10 From: Ontario Member No.: 5221 |
During the finale coverage, one member of the team (I forgot who) said that another possible alternative for disposal would have been an orbit far beyond both Enceladus and Titan. It may have been possible, but all the good science is of course in the centre of the system, so they decided to follow the science.
Sure, a few flybys of the irregular moons would have be good, along with plasma and dust science, but they balanced that against the ring and atmosphere science (we'll see what is recovered from the final dive) See slide 19 here: http://www.lpi.usra.edu/opag/march_08_meet...ons/spilker.pdf |
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Sep 20 2017, 01:29 AM
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#127
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Member Group: Members Posts: 866 Joined: 15-March 05 From: Santa Cruz, CA Member No.: 196 |
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Sep 29 2017, 02:01 AM
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#128
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Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 |
My pictorial tribute to our dear and departed robotic friend ....
Cassini's Last Dance — A Final Portrait of Saturn by Ian Regan, on Flickr -------------------- |
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Nov 22 2017, 04:02 AM
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#129
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Senior Member Group: Members Posts: 2106 Joined: 13-February 10 From: Ontario Member No.: 5221 |
The CICLOPS team version of the final mosaic: http://ciclops.org/view/8631/A-Farewell-to-Saturn
Farewell... |
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