July 23 Tethys Imaging, South polar imaging |
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July 23 Tethys Imaging, South polar imaging |
 Jul 1 2006, 06:45 PM
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 Member  Group: Members Posts: 147 Joined: 4-March 06 Member No.: 694  |
I have been using the solar system simulator alot on the July 23 Tethys encounter and from what I see, Cassini will be able to image all of the remaining bits of Tethys' south polar region that until has been poorly imaged.
Is this true? -------------------- I call heaven and earth to witness against you this day, that I have set before thee life and death, the blessing and the curse; therefore choose life, that thou mayest live, thou and thy seed.
- Opening line from episode 13 of "Cosmos" |
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Jul 10 2006, 07:09 PM
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 Senior Member Group: Moderator Posts: 2818 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
yepper. There is a great Tethys opportunity on that date. Closest approach looks to be around 120,000 km. Low-phase, best imaging of Odysseus that I am aware of
 Thanks for bringing this up.
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Jul 10 2006, 09:07 PM
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Senior Member Group: Moderator Posts: 2818 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
Actually, Rev26 could be a good orbit for icy sats. Decent observations of Rhea and Dione are also planned, though not as good IMHO as the Tethys stuff. Like the Rev25 Enceladus observations where we missed the satellite, the Tethys observation is a ride-along observation. We should still hit the satellite, this time (fingers crossed)
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Jul 11 2006, 07:25 AM
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 Senior Member Group: Members Posts: 3534 Joined: 1-October 05 From: Croatia Member No.: 523 |
QUOTE (volcanopele @ Jul 10 2006, 10:07 PM)  Like the Rev25 Enceladus observations where we missed the satellite, the Tethys observation is a ride-along observation. Missed it? I'm curious of the ways that can happen. Is it merely a consequence of ride-along observations where you miss a slew or just bad Inertial-Vector-Propagator-thingies? -------------------- |
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Jul 15 2006, 02:23 AM
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 IMG to PNG GOD Group: Moderator Posts: 1323 Joined: 19-February 04 From: Near fire and ice Member No.: 38 |
Yes, a great Tethys flyby with closest approach at 120,000 km, subspacecraft lat=-39.7, subspacecraft lon=85.8, phase=37.5.
There is also 45,000 km Telesto flyby on July 24. I wonder if any imaging is planned for that flyby. |
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Jul 23 2006, 06:33 PM
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 Senior Member Group: Members Posts: 1620 Joined: 20-November 04 From: Iowa Member No.: 110 |
One image down, nice view of the chasm
http://saturn.jpl.nasa.gov/multimedia/imag...eiImageID=79848 |
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Jul 24 2006, 10:48 AM
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 Junior Member Group: Members Posts: 66 Joined: 8-November 05 From: Australia Member No.: 547 |
QUOTE One image down, nice view of the chasm http://saturn.jpl.nasa.gov/multimedia/imag...eiImageID=79848 Odd feeling of Deja Vu, check out this previous image from Feb 2005... http://saturn.jpl.nasa.gov/multimedia/imag...fm?imageID=1353 |
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Jul 25 2006, 08:40 AM
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Member Group: Members Posts: 147 Joined: 4-March 06 Member No.: 694 |
The raw images are available to view now.
-------------------- I call heaven and earth to witness against you this day, that I have set before thee life and death, the blessing and the curse; therefore choose life, that thou mayest live, thou and thy seed.
- Opening line from episode 13 of "Cosmos" |
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Jul 25 2006, 10:03 AM
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#9
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Senior Member Group: Members Posts: 1620 Joined: 20-November 04 From: Iowa Member No.: 110 |
Check out the area to left of center in this image of Tethys, it appears to have fewer craters (is younger than?) the area it the right.
http://saturn.jpl.nasa.gov/multimedia/imag...2/N00064170.jpg |
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Jul 25 2006, 10:35 AM
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#10
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QUOTE (alan @ Jul 25 2006, 10:03 AM) Check out the area to left of center in this image of Tethys, it appears to have fewer craters (is younger than?) the area it the right. http://saturn.jpl.nasa.gov/multimedia/imag...2/N00064170.jpg The boundary looks curved. Could it be a shallow impact basin that's been entirely filled in? |
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Jul 25 2006, 03:24 PM
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 Member Group: Members Posts: 104 Joined: 6-November 05 From: So. Maryland, USA Member No.: 544 |
QUOTE (David @ Jul 25 2006, 06:35 AM) The boundary looks curved. Could it be a shallow impact basin that's been entirely filled in? It would have to be a very big one. There is a sharp border between the two terrains, coming right out of the side of Odysseus, but for most of the border there doesn't seem to be any topographic evidence of a basin rim. It's interesting that the dark band area at the bottom right looks so similar to the adjoining, brighter terrain. Michael |
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Jul 25 2006, 06:36 PM
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Member Group: Members Posts: 154 Joined: 16-May 06 From: Geneva, Switzerland Member No.: 773 |
Are you sure the big crater o the picture is Odysseus ?
It seems to be a little bit too small. I would say Melanthius or Antonous, one of the big craters localized near the south pole. |
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Jul 25 2006, 07:37 PM
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Senior Member Group: Moderator Posts: 2818 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
It's Melanthius.
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Jul 25 2006, 08:24 PM
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#14
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Senior Member Group: Members Posts: 4521 Joined: 5-April 05 From: Canada Member No.: 227 |
There certainly do seem to be regional variations on Tethys... I don't think this boundary is a basin rim. The cratered side almost looks like a swarm of secondaries, or similar-looking craters, as if (say) a shattered co-orbital splattered across this area.
Phil -------------------- ... because the Solar System ain't gonna map itself.
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Jul 25 2006, 08:51 PM
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Member Group: Members Posts: 809 Joined: 11-March 04 Member No.: 56 |
QUOTE (Phil Stooke @ Jul 25 2006, 08:24 PM) There certainly do seem to be regional variations on Tethys... I don't think this boundary is a basin rim. The cratered side almost looks like a swarm of secondaries, or similar-looking craters, as if (say) a shattered co-orbital splattered across this area. I'm just guessing here, but wouldn't that produce a gradient in crater size (increasing toward the site(s) of impact and decreasing farther away) rather than a sharp(ish) boundary? If not an impact basin, could it be a surface flow of some kind, caused by localized melting (or at least enough of a temperature increase to render the icy surface more plastic)? |
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