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November 9 2006 icy moon encounters
alan
post Nov 5 2006, 03:26 AM
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Using the solar system simulator I found a pass ~100,000 km from Enceladus' south pole.
http://space.jpl.nasa.gov/cgi-bin/wspace?t...=1&showsc=1
Any others planned for this orbit?
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Decepticon
post Nov 5 2006, 06:36 AM
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Finally some Ice moons observations. Lacking as of late. biggrin.gif
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angel1801
post Nov 5 2006, 08:36 AM
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November 8-9 encounters:

Enceladus
Tethys

November 20-21 encounters:

Mimas
Dione

December 14-15 encouters:

Dione
Tethys

December 31 encounters:

Dione


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edstrick
post Nov 6 2006, 10:48 AM
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Caution and Note: On the current high inclination orbits, the spacecraft plunges rapidly through Saturn's equatorial plane on the periapsis part of the pass. The result is that moderately encounters are possible with whatever moons happen to be near the plunge-point, but the trajectory won't stay in the equatorial plane and give relatively close encounters with other moons. An advantage is that moons will be able to be seen will be seen from one high "altitude" parts of the pass, giving better views of the poles than tends to be possible from equatorial orbits.
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angel1801
post Nov 6 2006, 02:55 PM
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The November 8-9 encounters of both Enceladus and Tethys are over high southern latitudes.

Enceladus at about 129,000km and Tethys at about 238,000km.

The November 20-21 encounters of Dione and Mimas are also both over high southern latitudes.

Mimas at about 175,000km and Dione at about 145,000km.

The Mimas encounter should fill alot of the gaps in Steve Alber's Mimas maps, especially near the south pole!


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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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Holder of the Tw...
post Nov 10 2006, 03:53 AM
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Two pics have come in so far, one of Enceladus and one of Mimas. Both fairly far out, about 400,000 km for each. Still, the Enceladus pic shows some better resolved... and interesting... features beyond the tiger stripes. This is on the upper left side in the raw picture. The stripes run almost horizontally from the terminator toward the left and downward just a little, and stop about halfway to the edge. This in the upper third of the half disk.

Raw image

Mimas pic
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angel1801
post Nov 10 2006, 05:25 AM
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The mimas image gives a very good view of it's south polar area. But we will see the same area at much better resolution on November 20-21.

The Enceladus image shows alot of the poorly seen areas at about 2.4km/pixel.

We will get much better resolution of these areas on May 27, June 28 and September 30 of next year.


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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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Phil Stooke
post Nov 12 2006, 03:21 PM
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I've processed the Mimas and Enceladus pics a bit - you can't perform miracles with these JPEGs, but my interest is in making near-terminator features easier to see. There's a bit of Saturnshine on Mimas.

Phil

Attached Image


Attached Image


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TritonAntares
post Nov 13 2006, 11:47 PM
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Let me add the view with Solar System Simulator:
Crosses mark the southpoles.

Attached Image

Mimas

Attached Image

Enceladus

And a map of known, unknown or mostly bad resolved regions at Enceladus southpolar cap:
Attached Image


Bye.
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ugordan
post Nov 14 2006, 08:19 AM
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Nice pictures, Phil. Sadly, from the looks of things, these two lone opnavs are the only images we'll be seeing from this periapsis pass. Due to a combination of bad timing on Cassini's part as well as bad timing on MGS's part and consequent recovery operations, all useful imaging data was lost.


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scalbers
post Nov 18 2006, 05:49 PM
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Nice to see at least this one Enceladus image. So far I've been able to add a portion of this to my map, at moderately high southern latitudes near 0 degrees longitude. The latest version is at http://laps.noaa.gov/albers/sos/sos.html#ENCELADUS


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volcanopele
post Dec 22 2006, 05:35 PM
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While ISS missed Enceladus on this encounter, CIRS got some decent data at Enceladus, revealing the hot spot at the south pole:

http://photojournal.jpl.nasa.gov/catalog/PIA09037


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scalbers
post Dec 22 2006, 09:23 PM
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Interesting to see that both views over time show the same embedded cooler region between about 180 and 210 degrees longitude...


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scalbers
post Mar 3 2007, 05:59 PM
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In relation to Enceladus I've been gradually adding some high resolution images of those fascinating mid-southern latitudes to my map. The most recent update is available at this URL:

http://laps.noaa.gov/albers/sos/sos.html#ENCELADUS


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ustrax
post Mar 3 2007, 09:08 PM
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QUOTE (scalbers @ Mar 3 2007, 05:59 PM) *
In relation to Enceladus I've been gradually adding some high resolution images of those fascinating mid-southern latitudes to my map. The most recent update is available at this URL:


Great site. Great work! biggrin.gif


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