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April 30 Icy Moon Imaging
angel1801
post Apr 24 2006, 02:58 PM
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Apart from Titan, will Cassini get close to any icy moons when it gets into the inner part of Saturn on or around April 30? I've checked using the Solar System Simulator and I have not seen anything good to date.


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volcanopele
post Apr 26 2006, 08:39 PM
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The best non-targeted encounter ofthis orbit is that of Janus on Saturday UTC. we come within 209,000 km of this small satellite. Should provide the best imaging to date of this moon, with pixel scales better than 1.25 km/pixel, though near the end of the encounter, Janus will start to be occulted by the rings. Images from this encounter should be down early Sunday.

This encounter also provides a decent imaging opportunity of Rhea.


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angel1801
post Apr 29 2006, 02:16 PM
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I'm here to tell you that the first two images of Rhea are now available. The distance is about 481,000km and Rhea is centered about 32S, 75W in these images. This means the "Great White Splat" is visible in both images relased to date. THe Janus images are not in yet.


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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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TritonAntares
post Apr 29 2006, 04:29 PM
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Hi,
there could be the possibility to have a 'closer' look at Janus (diameter 181 km).
As I read, CASSINI should pass it in roughly 204.400 km on april 29th, the closest distance so far.

I tried to create a simulation with Solar System Viewer to check this info,
but unfortunately Janus isn't inclueded there... blink.gif huh.gif

Best Janus image so far:

Date: 2005/05/20
Distance: 357.000 km
Resolution: ~2 km/pxl
Let's wait if they actually took some pics...

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dilo
post Apr 29 2006, 07:20 PM
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QUOTE (TritonAntares @ Apr 29 2006, 04:29 PM) *
Best Janus image so far:

Date: 2005/05/20
Distance: 357.000 km
Resolution: ~2 km/pxl
Let's wait if they actually took some pics...

Waiting for closer looks, this is the sharpened/contrast enhanced version:
Attached thumbnail(s)
Attached Image
 


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Posts in this topic
- angel1801   April 30 Icy Moon Imaging   Apr 24 2006, 02:58 PM
- - tasp   The Voyager trajectories with their multiple moon ...   Apr 24 2006, 05:30 PM
- - Analyst   Almost all of the Voyager encounters were far enco...   Apr 24 2006, 06:57 PM
|- - ugordan   From what I see, Cassini will fly pretty far from ...   Apr 25 2006, 09:44 AM
- - edstrick   Voyager 1's primary small moon target was Rhea...   Apr 25 2006, 10:47 AM
|- - angel1801   QUOTE (edstrick @ Apr 25 2006, 08:17 PM) ...   Apr 25 2006, 11:38 AM
|- - ugordan   QUOTE (edstrick @ Apr 25 2006, 11:47 AM) ...   Apr 25 2006, 11:38 AM
- - Analyst   See page 35 (pdf-page 47) on The Voyager Neptune T...   Apr 25 2006, 12:33 PM
|- - ugordan   There's a rather elaborate description of the ...   Apr 25 2006, 01:00 PM
||- - ljk4-1   QUOTE (ugordan @ Apr 25 2006, 09:00 AM) N...   Apr 25 2006, 02:18 PM
||- - ugordan   QUOTE (ljk4-1 @ Apr 25 2006, 03:18 P...   Apr 25 2006, 02:27 PM
|- - angel1801   QUOTE (Analyst @ Apr 25 2006, 10:03 PM) S...   Apr 25 2006, 02:09 PM
- - Analyst   QUOTE (ugordan @ Apr 25 2006, 01:00 PM) I...   Apr 25 2006, 03:02 PM
- - volcanopele   The best non-targeted encounter ofthis orbit is th...   Apr 26 2006, 08:39 PM
|- - angel1801   I'm here to tell you that the first two images...   Apr 29 2006, 02:16 PM
|- - TritonAntares   Hi, there could be the possibility to have a ...   Apr 29 2006, 04:29 PM
|- - dilo   This image of Epimetheus+rings+Titan is really stu...   Apr 29 2006, 06:14 PM
|- - dilo   QUOTE (TritonAntares @ Apr 29 2006, 04:29...   Apr 29 2006, 07:20 PM
- - BruceMoomaw   Interesting. Janus -- like the little Lagrange mo...   Apr 29 2006, 10:43 PM
- - Phil Stooke   It is an illusion, but not caused by low resolutio...   Apr 29 2006, 11:38 PM
- - edstrick   The article on Voyager 2's Saturn encounter th...   Apr 30 2006, 07:45 AM
|- - ugordan   Janus UV3-GRN-IR1 composite, distance ~220 000 km:...   Apr 30 2006, 02:40 PM
|- - ugordan   Rhea from ~481 000 km, R+B composite with a synthe...   Apr 30 2006, 03:05 PM
|- - volcanopele   QUOTE (ugordan @ Apr 30 2006, 07:40 AM) J...   May 1 2006, 07:28 PM
- - alan   Which moon is below the rings? http://saturn1.jpl....   Apr 30 2006, 04:06 PM
|- - TritonAntares   QUOTE (alan @ Apr 30 2006, 06:06 PM) Whic...   Apr 30 2006, 05:22 PM
|- - volcanopele   QUOTE (TritonAntares @ Apr 30 2006, 10:22...   Apr 30 2006, 05:39 PM
|- - TritonAntares   QUOTE (volcanopele @ Apr 30 2006, 07:39 P...   May 1 2006, 05:22 PM
- - volcanopele   Nope, Prometheus. prometheus is a bit more hot do...   May 1 2006, 05:46 PM
|- - TritonAntares   QUOTE (volcanopele @ May 1 2006, 07:46 PM...   May 1 2006, 06:31 PM
- - SigurRosFan   It's Janus (above, 218,000 km distance) and Pr...   Jun 5 2006, 01:21 PM
- - jasedm   Can anyone confirm whether Cassini is still assign...   Sep 23 2006, 07:37 PM
|- - ugordan   The recent Cassini significant events report state...   Sep 23 2006, 08:37 PM
- - jasedm   Hi ugordan, the dark crater floors were intimated ...   Sep 23 2006, 09:14 PM
|- - ugordan   Somehow I'm not very convinced those are dark ...   Sep 23 2006, 09:41 PM
- - jasedm   Yes, it's probably wishful thinking on my part...   Sep 23 2006, 10:18 PM
- - nprev   Speaking of icy moons, check out this recent shot ...   Sep 23 2006, 11:31 PM
|- - Rob Pinnegar   QUOTE (nprev @ Sep 23 2006, 05:31 PM) REA...   Sep 24 2006, 01:47 AM
- - Decepticon   Here's another of Iapetus http://saturn.jpl.na...   Sep 24 2006, 03:22 AM
- - edstrick   I remain convinced that there a black monolith on ...   Sep 24 2006, 06:49 AM
- - nprev   QUOTE (edstrick @ Sep 23 2006, 11:49 PM) ...   Sep 24 2006, 09:16 PM
- - ugordan   QUOTE (nprev @ Sep 24 2006, 10:16 PM) Yea...   Sep 24 2006, 09:28 PM

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