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Enceladus-3 (March 12, 2008)
Guest_AlexBlackwell_*
post Feb 24 2006, 09:12 PM
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Excerpt from Cassini Significant Events for 02/16/06 - 02/22/06:

"As mentioned in previous weeks, the project has been working on adopting a new reference trajectory in order to raise the minimum Titan flyby altitude for various encounters. Today the project reached a decision to proceed with the 'optocc2' trajectory. Additional work is still to be performed before delivery of the final files. This will include minor tweaks that have been analyzed in other trajectories, adjusting orbit 68 timing, and capture of an Enceladus plume occultation on orbit 28."

For the record, the new reference trajectory will result in an even more spectacular Enceladus-3 flyby [61EN (t) E3] on March 12, 2008.
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Guest_BruceMoomaw_*
post Mar 9 2006, 09:36 PM
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TWENTY-FIVE KM?!! You guys are really taking this place seriously, aren't you? I hope the navigation is better than that on MCO...

In that connection, one catastrophe that has yet to strike the US space program is the failure of an long, expensive outer Solar System mission just before its arrival. What will the public and Congressional reaction be when that finally happens? It looked as though it might happen with Galileo, but JPL succeeded (to their unquestionable credit) in pulling enough chestnuts out of the fire to remove that impression in that case.

At the risk of setting off the dog (aka Alex) again: I mentioned this point to Spilker's subgroup on Europa lander design at the Europa Focus Group Workshop, and got an enthusiastic response from JPL's Karla Clark -- we do NOT want something as expensive and long-term as a Europa Astrobiology Lander to fail at the very moment it's trying to land on Europa, and for that reason the best role for a little piggyback lander attached to Europa Orbiter may well be to check out the engineering characteristics of Europa's surface rather than carrying out any specifically scientific studies.
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Guest_AlexBlackwell_*
post Mar 9 2006, 09:47 PM
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QUOTE (BruceMoomaw @ Mar 9 2006, 09:36 PM) *
...JPL's Karla Clark -- we do NOT want something as expensive and long-term as a Europa Astrobiology Lander to fail at the very moment it's trying to land on Europa...

Now that's a visionary statement.

QUOTE (ugordan @ Mar 9 2006, 09:42 PM) *
I'm wondering about this figure as well, I noticed volcanopele edited it out of his post. Does that figure really hold in the new updated trajectory?

"Officially," the new reference trajectory is still in review at the Project/Program level; a decision should be forthcoming very shortly. I won't speak for Jason, but unofficially, the 25 km figure is the new Enceladus-3 flyby C/A altitude under all options that were being considered.

QUOTE (ugordan @ Mar 9 2006, 09:42 PM) *
What exactly is the scientific justification of such a dangerously close pass?

More on that later; however, sooner than 2008 tongue.gif
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Posts in this topic
- AlexBlackwell   Enceladus-3 (March 12, 2008)   Feb 24 2006, 09:12 PM
- - BruceMoomaw   It was casually confirmed in one of the new EGU ab...   Feb 25 2006, 04:03 AM
- - volcanopele   Even though the encounter distance is closer, don...   Feb 25 2006, 04:12 AM
|- - AlexBlackwell   QUOTE (volcanopele @ Feb 25 2006, 04:12 A...   Feb 27 2006, 04:13 PM
|- - Holder of the Two Leashes   QUOTE (volcanopele @ Feb 24 2006, 10:12 P...   Feb 27 2006, 04:40 PM
|- - ljk4-1   Check this out: http://drudgereport.com/flash8na....   Mar 9 2006, 06:42 PM
|- - volcanopele   QUOTE (ljk4-1 @ Mar 9 2006, 11:42 AM...   Mar 9 2006, 07:37 PM
|- - AlexBlackwell   QUOTE (volcanopele @ Mar 9 2006, 07:37 PM...   Mar 9 2006, 07:43 PM
- - BruceMoomaw   TWENTY-FIVE KM?!! You guys are really taki...   Mar 9 2006, 09:36 PM
|- - ugordan   QUOTE (BruceMoomaw @ Mar 9 2006, 10:36 PM...   Mar 9 2006, 09:42 PM
|- - AlexBlackwell   QUOTE (BruceMoomaw @ Mar 9 2006, 09:36 PM...   Mar 9 2006, 09:47 PM
||- - volcanopele   Technically, that number is official (well, it isn...   Mar 9 2006, 10:12 PM
|||- - AlexBlackwell   QUOTE (volcanopele @ Mar 9 2006, 10:12 PM...   Mar 9 2006, 10:17 PM
|||- - EccentricAnomaly   QUOTE (volcanopele @ Mar 9 2006, 02:12 PM...   Mar 10 2006, 04:43 AM
|||- - AlexBlackwell   QUOTE (EccentricAnomaly @ Mar 10 2006, 04...   Mar 10 2006, 04:26 PM
|||- - JRehling   Various notes: However we might wring our hands o...   Mar 10 2006, 05:32 PM
|||- - AlexBlackwell   QUOTE (JRehling @ Mar 10 2006, 05:32 PM) ...   Mar 10 2006, 06:07 PM
|||- - RGClark   QUOTE (JRehling @ Mar 10 2006, 05:32 PM) ...   Mar 10 2006, 06:26 PM
||- - AlexBlackwell   QUOTE (AlexBlackwell @ Mar 9 2006, 09:47 ...   Mar 15 2006, 08:38 PM
|- - The Messenger   QUOTE (BruceMoomaw @ Mar 9 2006, 02:36 PM...   Mar 9 2006, 10:23 PM
|- - ugordan   QUOTE (The Messenger @ Mar 9 2006, 11:23 ...   Mar 9 2006, 10:34 PM
|- - The Messenger   QUOTE (ugordan @ Mar 9 2006, 03:34 PM) Yo...   Mar 10 2006, 06:37 AM
- - Richard Trigaux   Passing at 25 kms of Enceladus would be very inter...   Mar 9 2006, 11:05 PM
|- - DDAVIS   To take images? Wow fantastic images from such an ...   Mar 9 2006, 11:38 PM
- - Sunspot   I think this is the highest resolution image taken...   Mar 9 2006, 11:49 PM
|- - JRehling   QUOTE (Sunspot @ Mar 9 2006, 03:49 PM) I ...   Mar 10 2006, 12:04 AM
- - BruceMoomaw   Unfortunately, as Jason noted back on his own (sor...   Mar 10 2006, 05:01 AM
|- - Richard Trigaux   QUOTE (BruceMoomaw @ Mar 10 2006, 06:01 A...   Mar 10 2006, 08:44 AM
|- - AlexBlackwell   QUOTE (BruceMoomaw @ Mar 10 2006, 05:01 A...   Mar 10 2006, 03:52 PM
|- - EccentricAnomaly   QUOTE (BruceMoomaw @ Mar 9 2006, 09:01 PM...   Mar 10 2006, 05:57 PM
- - gpurcell   If the E-Ring is caused by the venting, why not tr...   Mar 10 2006, 07:13 PM
- - tty   Isnít landing on Enceladus an unnecessarily compli...   Mar 10 2006, 07:24 PM
|- - Richard Trigaux   QUOTE (tty @ Mar 10 2006, 08:24 PM) Isnít...   Mar 10 2006, 07:41 PM
- - BruceMoomaw   QUOTE (AlexBlackwell @ Mar 10 2006, 03:52...   Mar 10 2006, 07:24 PM
|- - AlexBlackwell   QUOTE (BruceMoomaw @ Mar 10 2006, 07:24 P...   Mar 10 2006, 07:44 PM
|- - JRehling   QUOTE (AlexBlackwell @ Mar 10 2006, 11:44...   Mar 10 2006, 08:12 PM
- - volcanopele   a few notes: E3 Imaging: Don't expect super h...   Mar 10 2006, 07:36 PM
|- - AlexBlackwell   QUOTE (volcanopele @ Mar 10 2006, 07:36 P...   Mar 10 2006, 09:34 PM
|- - RGClark   QUOTE (volcanopele @ Mar 10 2006, 07:36 P...   Mar 10 2006, 10:48 PM
|- - RGClark   QUOTE (volcanopele @ Mar 10 2006, 07:36 P...   Mar 11 2006, 03:33 PM
|- - JRehling   One Enceladus mission I could see flying would be ...   Mar 11 2006, 06:58 PM
- - BruceMoomaw   OK. All I can report is what I saw: before Ms. Cl...   Mar 10 2006, 09:16 PM
|- - AlexBlackwell   QUOTE (BruceMoomaw @ Mar 10 2006, 09:16 P...   Mar 10 2006, 10:15 PM
- - BruceMoomaw   QUOTE (AlexBlackwell @ Mar 10 2006, 10:15...   Mar 10 2006, 11:20 PM
|- - AlexBlackwell   QUOTE (BruceMoomaw @ Mar 10 2006, 11:20 P...   Mar 10 2006, 11:51 PM
|- - helvick   QUOTE (AlexBlackwell @ Mar 10 2006, 11:51...   Mar 11 2006, 01:54 AM
|- - AlexBlackwell   QUOTE (helvick @ Mar 11 2006, 01:54 AM) I...   Mar 11 2006, 02:00 AM
- - BruceMoomaw   Fine -- especially since the whole damn thing was ...   Mar 11 2006, 02:50 AM
- - BruceMoomaw   I found Jason's blog entry from almost a year ...   Mar 11 2006, 11:19 AM
|- - EccentricAnomaly   QUOTE (BruceMoomaw @ Mar 11 2006, 03:19 A...   Mar 11 2006, 06:01 PM
- - BruceMoomaw   The NEP idea -- which would orbit Saturn and fly t...   Mar 11 2006, 10:53 PM
- - BruceMoomaw   QUOTE (EccentricAnomaly @ Mar 11 2006, 06...   Mar 12 2006, 11:30 PM
|- - volcanopele   QUOTE (BruceMoomaw @ Mar 12 2006, 04:30 P...   Mar 13 2006, 02:46 AM
|- - ugordan   QUOTE (BruceMoomaw @ Mar 13 2006, 12:30 A...   Mar 13 2006, 08:38 AM
- - volcanopele   The planetary society Cassini tour page now has th...   Mar 15 2006, 10:06 PM
|- - AlexBlackwell   QUOTE (volcanopele @ Mar 15 2006, 10:06 P...   Mar 15 2006, 10:19 PM
- - AlexBlackwell   I just read the materials in the 060323 Reference ...   Mar 28 2006, 09:26 PM
- - BruceMoomaw   Can you tell us anything more about just what they...   Mar 29 2006, 01:11 AM
- - AlexBlackwell   QUOTE (BruceMoomaw @ Mar 29 2006, 01:11 A...   Mar 29 2006, 06:10 PM


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