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Posted by: Thorsten Jun 20 2006, 07:21 AM

Hi everybody,
Are there any plans for icy moon imaging on June 30?
I took a look at the solar system simulator and had the impression that at least Enceladus could allow some decent shots. (Enceladus: C/A (around 9:00 UTC) about 175,000 km, Phase 60°).
And there are two more goodies! A few hours before C/A Enceladus will be in front of Saturn, allowing one or two more Kodak moments. And a few hours earlier (around 0:00 UTC) Cassini should get a glimpse of Enceladus’ leading heimspere, which has been poorly covered so far.

Posted by: tallbear Jun 20 2006, 08:30 AM

QUOTE (Thorsten @ Jun 20 2006, 12:21 AM)

Hi everybody,
Are there any plans for icy moon imaging on June 30?
I took a look at the solar system simulator and had the impression that at least Enceladus could allow some decent shots. (Enceladus: C/A (around 9:00 UTC) about 175,000 km, Phase 60°).
And there are two more goodies! A few hours before C/A Enceladus will be in front of Saturn, allowing one or two more Kodak moments. And a few hours earlier (around 0:00 UTC) Cassini should get a glimpse of Enceladus’ leading heimspere, which has been poorly covered so far.

there is a CIRS set of thermal scans of Enceladus that has ISS as a RIDER.... 2006-181T06:50:00
for about an hour ... this is a Saturn TWT Periapsis segment ..... mostly atmospheric studies and
MAPS work with some retargetables and an atmos star occ of Beta Ori ... this is the final Equatorial
periapsis... from Rev 26 on it will be Ring Viewing ... expect spokes to be back ....

Posted by: angel1801 Jun 20 2006, 01:09 PM

I said in another thread that a few hours earlier than C/A, Cassini will get to image the poorly seen bits of Enceladus at about 2km/pxl. Distance will be about 347,000km. I hope this area is imaged as it will improve crater counts and comparisons between the saturn and anti-saturn hemipheres.

The Mimas encouter will be good to. Before Mimas C/A, there will be a chance to image new areas on the moon at decent resoution. ie 2km/pxl

Posted by: volcanopele Jun 20 2006, 04:16 PM

QUOTE (tallbear @ Jun 20 2006, 01:30 AM)

there is a CIRS set of thermal scans of Enceladus that has ISS as a RIDER.... 2006-181T06:50:00
for about an hour ... this is a Saturn TWT Periapsis segment ..... mostly atmospheric studies and
MAPS work with some retargetables and an atmos star occ of Beta Ori ... this is the final Equatorial
periapsis... from Rev 26 on it will be Ring Viewing ... expect spokes to be back ....

Yeah, that's the only Enceladus observation I can see. Over the anti-Saturnian hemisphere so no new coverage, but there should be decent resolution, ~ 1km/pixel. Also some Hyperion stuff at 1.7 km/pixel.

Posted by: Thorsten Jun 28 2006, 10:45 AM

Hyperion is slowly tumbling into view. Images are from June 25, (1,517,000 km away) and June 27, (549,000 km away).

Posted by: peter59 Jun 29 2006, 01:46 PM

Hyperion - new set of medium resolution images
http://saturn.jpl.nasa.gov/multimedia/images/raw/casJPGFullS21/N00063188.jpg

Posted by: angel1801 Jun 29 2006, 02:29 PM

I have checked the solar system simulatior and from 293,000km, we get to look an entire hemisphere of Hyperion, with the south pole at the bottom and the north pole at the top. I do assume here Hyperion's chaotic rotation is choatic in both north-south and east-west direction here.

Posted by: Ian R Jun 29 2006, 11:04 PM

Here's a stacked version of the current Hyperion image:

Posted by: ugordan Jun 30 2006, 06:35 AM

And here's a IR1-GRN-UV3 stretched color view, no resizing, just some slight sharpening was applied:

Posted by: Decepticon Jun 30 2006, 12:39 PM

Wow nice!

Posted by: um3k Jun 30 2006, 09:24 PM

Here's a hybrid of Ian_R's stacked image and ugordan's color image:
http://um3k.justinphillips.googlepages.com/Hyperion-Ian_R-stack__ugordan-color.png

Posted by: dilo Jul 1 2006, 09:28 AM

Ehm.. I was dooing almost the same things before to discover these post!

ok, this is another version, I like enhanced colors suggesting geologic differences between dark craters and "plain", redder regions (composition of images N63181+183+188, IR+green+UV).

Posted by: alan Jul 2 2006, 12:53 AM

Rhea behind the rings
http://saturn.jpl.nasa.gov/multimedia/images/raw/casJPGFullS21/N00063372.jpg

Posted by: Ian R Jul 2 2006, 03:28 AM

Shadow of a moon and the F-ring on Saturn's northern hemisphere:

http://saturn.jpl.nasa.gov/multimedia/images/raw/raw-images-details.cfm?feiImageID=78141

One of the co-orbitals possibly?

Posted by: dilo Jul 2 2006, 08:01 AM

QUOTE (Ian R @ Jul 2 2006, 03:28 AM)

Shadow of a moon and the F-ring on Saturn's northern hemisphere:

I think could be Epimetheus, but not sure...
Anyway, here two composite images using MT3+MT2+CB2 filters:

Notes:
- start images are W00015663+64+65 and W00015666+67+68
- I introduced a shift in the shadow detail in order to match them without impact overall Saturn image
- overall color balance modified in order to have more visual realistic result in terms of overall hue (saturation is enhanced); consider, however, that start images aren't RGB, so result cannot be completely realistic.

Posted by: dilo Jul 2 2006, 08:21 AM

and this is the Atlas sequence:

Posted by: dilo Jul 4 2006, 05:39 AM

QUOTE (alan @ Jul 2 2006, 12:53 AM)