Cassini's Extended-Extended Mission, July 2010-June 2017 |
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Cassini's Extended-Extended Mission, July 2010-June 2017 |
 Feb 21 2009, 07:34 PM
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#16
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Senior Member  Group: Members Posts: 1018 Joined: 29-November 05 From: Seattle, WA, USA Member No.: 590  |
QUOTE (volcanopele @ Feb 20 2009, 02:06 AM)  Someone must really like Helene for some reason... Probably some French guy from USC. --Greg :-) |
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Feb 21 2009, 09:19 PM
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#17
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 Member Group: Members Posts: 213 Joined: 21-January 07 From: Wigan, England Member No.: 1638 |
From the latest Cassini Significant Events report:
"A two-day NASA Senior Review of a proposal for a Cassini Extended Extended Mission (XXM) concluded today. The review board's comments and questions indicated that they were quite impressed with the science, science team, and technical presentations, and that they understood and appreciated the XXM plans, rationale, and concerns. Within a month the final review board report should be available and some time after that a final decision is expected from NASA Headquarters." They were only quite impressed?  |
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Feb 21 2009, 09:34 PM
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#18
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 Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
QUOTE (volcanopele @ Feb 20 2009, 11:06 AM) Someone must really like Helene for some reason... How close? -------------------- |
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Feb 21 2009, 10:00 PM
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#19
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 Senior Member Group: Members Posts: 1419 Joined: 26-July 08 Member No.: 4270 |
A 12 km Enceladus flyby sounds nice =) (When do we finally land?
 )I, actually, find the rock moons rather interesting. Has Mimas ever gotten close flyby? -------------------- -- Hungry4info (Sirius_Alpha)
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Feb 21 2009, 10:07 PM
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#20
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 Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
No, no, I meant that there are 12 encounters of Enceladus with C/A distances of less than 10,000 km.
The Helene encounter is currently around 1800 km on June 18, 2011. Looks like both flybys (the other being on March 3, 2010 at 1820 km) will allow for nearly global imaging of the small body so that after the two flybys, Helene should be pretty well mapped.
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-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Feb 21 2009, 10:18 PM
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#21
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Senior Member Group: Members Posts: 1419 Joined: 26-July 08 Member No.: 4270 |
QUOTE (volcanopele @ Feb 21 2009, 04:07 PM) No, no, I meant that there are 12 encounters of Enceladus with C/A distances of less than 10,000 km.    Ah, yep. I apologize, I misread your post. That's awesome, though, about Helene.
-------------------- -- Hungry4info (Sirius_Alpha)
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Feb 21 2009, 11:07 PM
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#22
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 Member Group: Members Posts: 340 Joined: 11-April 08 From: Sydney, Australia Member No.: 4093 |
I found a website which lists 4 different scenarioes for the XXM at http://www.mpi-hd.mpg.de/dustgroup/cassini/xxm/xxm.html
Anybody has any idea as to which one is most likely to be chosen? -------------------- |
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Feb 21 2009, 11:41 PM
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#23
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
It was SM-7.
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Feb 22 2009, 01:16 AM
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#24
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 Member Group: Members Posts: 753 Joined: 23-October 04 From: Greensboro, NC USA Member No.: 103 |
Just heard Carolyn Porco speak at Spacefest this afternoon. She saved Enceladus for last in her talk, and she spent more time talking about it than she did about Titan. In discussing the XXM, she was most excited about the additional Enceladus flybys, and also about the ring plane crossings.
-------------------- Jonathan Ward
Manning the LCC at http://www.apollolaunchcontrol.com |
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Feb 22 2009, 09:52 AM
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#25
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 Member Group: Members Posts: 655 Joined: 22-January 06 Member No.: 655 |
QUOTE (dmuller @ Feb 21 2009, 11:07 PM) I found a website which lists 4 different scenarioes for the XXM at http://www.mpi-hd.mpg.de/dustgroup/cassini/xxm/xxm.html Anybody has any idea as to which one is most likely to be chosen? Some very tempting options here, and a tough call for those making the decision - two of the rejected trajectory options include close flybys of Hyperion (and yet still managed to allow 10 close Enceladus encounters into the bargain) - it would have been fantastic to get another set of very close views of Hyperion from a different perspective. By my reckoning (if it isn't already) Enceladus will be easily the most intimately-known object outside of Mars' orbit at the end of the XXM. |
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Feb 22 2009, 05:12 PM
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#26
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Senior Member Group: Members Posts: 1018 Joined: 29-November 05 From: Seattle, WA, USA Member No.: 590 |
Is there something that indicates what sort of Titan coverage we might get during the XXM?
--Greg |
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Feb 22 2009, 05:20 PM
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#27
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
QUOTE (volcanopele @ Feb 21 2009, 11:07 PM) The Helene encounter is currently around 1800 km on June 18, 2011. Thanks. That's close, will Cassini be able to track Helene the whole encounter - angular rates and all that? Too bad about the missed opportunities to re-image Hyperion, that moon makes for great poster material. -------------------- |
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Feb 23 2009, 05:26 AM
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#28
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Member Group: Members Posts: 340 Joined: 11-April 08 From: Sydney, Australia Member No.: 4093 |
QUOTE (Greg Hullender @ Feb 23 2009, 04:12 AM) Is there something that indicates what sort of Titan coverage we might get during the XXM? Have a look at http://www.mpi-hd.mpg.de/cassini/xxm/SM-7/SM-7_all.txt That seems to be what's in the running, but I have no further insights other what's been said on this forum and that website -------------------- |
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Feb 23 2009, 05:54 AM
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#29
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
Whoops...
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-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Feb 23 2009, 02:47 PM
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#30
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Member Group: Members Posts: 910 Joined: 4-September 06 From: Boston Member No.: 1102 |
Cassini having a very bad day
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