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Rev 141 - Nov 20-Dec 10, 2010 - Hyperion and Enceladus E12
EDG
post Dec 2 2010, 07:37 AM
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I've put together a sequence of images of Hyperion (false colour, from the IR/Green/UV images) from the November 2010 sequence that you guys might appreciate smile.gif.

I've also written an article about the images and Hyperion on my Science blog!
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Ian R
post Dec 2 2010, 09:37 AM
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QUOTE (EDG @ Dec 2 2010, 04:29 AM) *
Did you put that together? I'd like to mention/link to it on my blog if I could.


Yes, that's mine: you're more than welcome to use it on your blog. As it happens, I've just produced a slightly better colorized version too:

http://www.youtube.com/watch?v=U5VfYDYL3rA



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Ian R
post Dec 2 2010, 09:49 AM
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The Enceladan horizon from 51 kilometres above the surface:


Attached Image


http://saturn.jpl.nasa.gov/photos/raw/rawi...?imageID=230082


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EDG
post Dec 2 2010, 10:01 AM
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QUOTE (Ian R @ Dec 2 2010, 01:37 AM) *
Yes, that's mine: you're more than welcome to use it on your blog. As it happens, I've just produced a slightly better colorized version too:

http://www.youtube.com/watch?v=U5VfYDYL3rA


Great, thanks! I've updated the link on my blog to it as well.

QUOTE (Ian R @ Dec 2 2010, 01:49 AM) *
The Enceladan horizon from 51 kilometres above the surface:


Attached Image


http://saturn.jpl.nasa.gov/photos/raw/rawi...?imageID=230082


Blimey, that's cutting it close! blink.gif
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EDG
post Dec 2 2010, 10:07 AM
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Nice new one of Enceladus over the rings (or maybe the shadow of the rings on Saturn?):

http://saturn.jpl.nasa.gov/photos/raw/rawi...?imageID=230086

I think something weird going on here (taken with CL1 and CL2):

http://saturn.jpl.nasa.gov/photos/raw/rawi...?imageID=230114

Compare that with this (same filters):

http://saturn.jpl.nasa.gov/photos/raw/rawi...?imageID=230116

It looks to me like the first image has more specular reflection (and contrast) in it? Is that just down to different exposure lengths, or is something else going on? Or is it just an illusion?
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volcanopele
post Dec 2 2010, 11:12 AM
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It is just a different stretch used by the JPL raw images page. The first image has fewer pixels on Enceladus' night side so the black level is set at a higher I/F than in the second image.


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Phil Stooke
post Dec 2 2010, 04:19 PM
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Very serious case of deja vu with this image:

http://saturn.jpl.nasa.gov/multimedia/imag...5/N00165320.jpg

Doesn't the terminator region look like the well-known corona on Miranda? I think so.

Phil


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Ian R
post Dec 2 2010, 05:26 PM
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Here's a IR/UV/GRN combo, with the saturation increased, and the gamma decreased:

Attached Image


The small orange splotch that appears half way up, on the far left of the image, appears to be a real feature; it's very prominent in the UV image, and faintly visible in the GRN filter too.


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ugordan
post Dec 2 2010, 07:27 PM
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QUOTE (Ian R @ Dec 2 2010, 06:26 PM) *
The small orange splotch that appears half way up, on the far left of the image, appears to be a real feature

Sorry, that's a flatfield effect. Another dust ring effect or similar.


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Ian R
post Dec 3 2010, 01:32 PM
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Gordan,

I stand corrected! wink.gif It was the differing visibility of this feature in the individual filters that threw me: a quick check of several different UV-filtered images confirm that it is indeed an artefact.

In the meantime, here's a four-frame clear filter mosaic:

Attached Image


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ugordan
post Dec 3 2010, 02:08 PM
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Nice!


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tedstryk
post Dec 3 2010, 05:30 PM
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QUOTE (Phil Stooke @ Dec 2 2010, 04:19 PM) *
Very serious case of deja vu with this image:

http://saturn.jpl.nasa.gov/multimedia/imag...5/N00165320.jpg

Doesn't the terminator region look like the well-known corona on Miranda? I think so.

Phil


It is uncanny...


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elakdawalla
post Dec 3 2010, 06:15 PM
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QUOTE (Ian R @ Dec 3 2010, 05:32 AM) *
In the meantime, here's a four-frame clear filter mosaic:
Great stuff, Ian. I tried to put that one together but couldn't figure out how to deal with Saturn's shifting position. Your cheat is quite elegant!


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brellis
post Dec 3 2010, 07:44 PM
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Ian, that's a great composite! thanks for posting it smile.gif
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stevesliva
post Dec 3 2010, 07:52 PM
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QUOTE (Phil Stooke @ Dec 2 2010, 11:19 AM) *
Doesn't the terminator region look like the well-known corona on Miranda? I think so.


Hey, look at that, Miranda is hypothesized to have once been in a 3:1 resonance with Umbriel and had more tidal heating.

Good captioned version of the photo here:
http://nssdc.gsfc.nasa.gov/imgcat/html/obj...g2_2684620.html
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