Rev 126 - Feb 4-22, 2010 - Mimas (main target), Tethys, Iapetus, Calypso and mutual events too |
Rev 126 - Feb 4-22, 2010 - Mimas (main target), Tethys, Iapetus, Calypso and mutual events too |
Feb 4 2010, 01:35 AM
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#1
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Member Group: Members Posts: 813 Joined: 29-December 05 From: NE Oh, USA Member No.: 627 |
All
closest look at Mimas ... 30 minutes after periapsis on 02/13/10 at 17:25 UTC http://ciclops.org/view/6188/Rev126 "Thirty minutes after periapse, ISS will perform a targeted encounter with Saturn's innermost large icy satellite, Mimas. The altitude for this encounter is 9,510 kilometers (5,910 miles) the closest Cassini has ever gotten to this cratered moon. For this encounter, ISS will acquire three mosaics along with another observation where ISS will be riding along with the Composite Infrared Spectrometer (CIRS). ISS' first mosaic of Mimas, GEOLOG001, will start 30 minutes after closest approach when Cassini is 14,800 kilometers (9,200 miles) away from Mimas. GEOLOG001 is a seven-frame, multi-spectral mosaic of the region surrounding the crater Herschel. Herschel, at 130 kilometers (80 miles) across, is the largest impact basin on Mimas, so large that it caused significant amounts of stress on the lithosphere of the small moon and so distinctive that it helped give the satellite the nickname, "The Death Star Moon." These high-resolution observations of the basin will be used to estimate the age of the crater. Scientists will count the number of smaller craters on the basin floor, compared to other regions on Mimas, to set limits on how old the basin can be. The second mosaic, GEOLOG002, will also be a seven-frame, multi-spectral mosaic, this time covering most of the visible surface of Mimas, shown above left. The best resolutions for these two observations will be 87 meters (285 feet) per pixel for GEOLOG001 and 191 meters (626 feet) per pixel GEOLOG002. Next, Cassini will ride-along with a CIRS FP3 temperature map of Mimas' day side, acquiring six narrow-angle-camera images during the scan. Finally, ISS will acquire a full-frame, multispectral observation (GLOCOL001) of Mimas' anti-Saturn hemisphere from a distance of 70,000 kilometers (44,000 miles). Saturn will provide a backdrop for this observation." Glorious Craig |
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Feb 4 2010, 03:16 AM
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#2
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Senior Member Group: Moderator Posts: 3242 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
Don't forget poor little Calypso.
-------------------- &@^^!% 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 7 2010, 08:08 AM
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#3
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Member Group: Members Posts: 655 Joined: 22-January 06 Member No.: 655 |
Yes, I'm glad that Calypso is getting a closer inspection on this rev - it'll be interesting to see how subdued the craters are compared to it's sibling Lagrange moon Telesto
This will mean that everything bigger than a kilometre or so within Hyperion's orbit will have been imaged by Cassini from less than 75,000km, except for Pan, Daphnis, Anthe and Methone - quite an achievement in itself. Really looking forward to Mimas - I wonder if there'll be more visible faulting around Herschel at the higher resolution? |
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Feb 10 2010, 06:25 PM
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#4
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Member Group: Members Posts: 207 Joined: 6-March 07 From: houston, texas Member No.: 1828 |
waiting in a snowstorm in DC to see if my train will depart on schedule . . .
Just posted some background info, data, and mosaics related to the upcoming Mimas encounter, including a rotating Mimas movie with the latest global mosaic, on my blog. (the movie is too large to upload here) http://stereomoons.blogspot.com/ http://www.youtube.com/watch?v=CwWBZFIBkr0 enjoy! -------------------- Dr. Paul Schenk, Lunar and Planetary Institute, Houston TX
http://stereomoons.blogspot.com; http://www.youtube.com/galsat400; http://www.lpi.usra.edu/science/schenk/ |
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Feb 12 2010, 10:53 PM
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#5
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Member Group: Members Posts: 813 Joined: 29-December 05 From: NE Oh, USA Member No.: 627 |
Very Cool Dr. Shank!!
I cannot wait! Thanks. Craig |
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Feb 13 2010, 03:27 PM
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#6
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Senior Member Group: Members Posts: 1670 Joined: 5-March 05 From: Boulder, CO Member No.: 184 |
-------------------- Steve [ my home page and planetary maps page ]
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Feb 13 2010, 04:34 PM
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#7
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Senior Member Group: Members Posts: 1670 Joined: 5-March 05 From: Boulder, CO Member No.: 184 |
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Feb 13 2010, 04:58 PM
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#8
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Senior Member Group: Members Posts: 1670 Joined: 5-March 05 From: Boulder, CO Member No.: 184 |
Here's a little movie...
mimas9.avi ( 835.5K ) Number of downloads: 540 Near closest approach (WAC FOV) at 1713UTC View around 1750UTC - looks more elliptical again "Live" Herschel NAC field of view at 1814UTC |
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Feb 13 2010, 05:52 PM
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#9
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Member Group: Members Posts: 571 Joined: 20-April 05 From: Silesia Member No.: 299 |
-------------------- Free software for planetary science (including Cassini Image Viewer).
http://members.tripod.com/petermasek/marinerall.html |
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Feb 13 2010, 07:12 PM
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#10
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Senior Member Group: Members Posts: 1453 Joined: 26-July 08 Member No.: 4270 |
Very much looking forward to images!
-------------------- -- Hungry4info (Sirius_Alpha)
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Feb 14 2010, 10:09 AM
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#11
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Member Group: Members Posts: 571 Joined: 20-April 05 From: Silesia Member No.: 299 |
Calypso !
http://saturn.jpl.nasa.gov/multimedia/imag...7/N00151487.jpg http://saturn.jpl.nasa.gov/multimedia/imag...7/N00151500.jpg -------------------- Free software for planetary science (including Cassini Image Viewer).
http://members.tripod.com/petermasek/marinerall.html |
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Feb 14 2010, 10:18 AM
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#12
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Senior Member Group: Moderator Posts: 3242 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
Just an FYI: the play back earlier was a short one, only running 2 hrs 20 mins. So we only managed to play back some of the data acquired during the periapse period, like the Calypso images and some images acquired of Saturn's haze layers while Cassini was in the planet's shadow. There is another playback period tonight and that one is the normal, 9 hours long. The Mimas data were carried over to that one.
-------------------- &@^^!% 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 14 2010, 10:45 AM
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#13
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Senior Member Group: Members Posts: 3652 Joined: 1-October 05 From: Croatia Member No.: 523 |
Eclipse view from Feb 13, WAC RGB:
Hmm, the more I look at this, the more it seems I've got it upside down. The rings look as if it's their unlit side, but their shadow should definitely not fall onto Saturn's northern hemisphere. Perhaps it's just the low illumination making this high phase view look unlit. Hence Cassini being above the ring plane and looking "down" onto the rings. Edit #2: Yep, it's upside down. The parallax motion is only consistent with Cassini orbiting prograde if the image is rotated. Here's the correct orientation and some brightness/saturation enhancement. -------------------- |
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Feb 14 2010, 12:08 PM
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#14
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Senior Member Group: Admin Posts: 3108 Joined: 21-December 05 From: Canberra, Australia Member No.: 615 |
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Feb 14 2010, 12:55 PM
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#15
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Member Group: Members Posts: 102 Joined: 29-January 10 From: Poland Member No.: 5205 |
I stack to color image from this:
N00151479 ( R ) N00151479 ( G ) N00151478 ( B ) -------------------- Adam Hurcewicz from Poland
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