CICLOPS: Cassini Imaging Central Laboratory for OPerationS

Sector 6

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Tethys 'Rev 164' Raw Preview #2
thetonster      
04-25-2012  04:39:31

R164 raw 2 shows mostly crater-saturated terrain, but in the upper left quadrant a couple of features are noteworthy.
The first is that Fault scarp from the large, irregular crater to the double crater (likely due to a simultaneous impact of two bodies).
The scarp casts shadows along 2/3 of its length, then suddenly changes to a bright cliff; this suggests a rotation has occurred on an axis normal to the fault.
Second is a lobate flow, off the rim of ‘North Dike’ crater, whose sharpness of form makes it seem to float above the underlying landscape. It appears to be a viscous flow, rather like Pahoehoe lava, in contrast to the loose-matter flows in ‘South Dike’ crater.
Crater chains abound in this scene, too.
Tethys is definitely interesting, and probably has more surprises for us.

Pitted Hyperion
thetonster      
11-10-2009  02:34:07

How many images have been made of Hyperion with Cassini? There was an article in Science a few years ago asserting chaotic rotation, but I wonder if it is in some exotic state wherein Hyperion effectively precesses at a rate almost equal to its rotation, and the latter possibly occurs around a non-principal axis, the way Eros does. This could mimic chaos over a relatively short time.
Also I wonder anyone has attempted to model the evolution of Hyperion’s orbit, and how it got so tangled up with Titan! Saturn’s family has so many marvelous mysteries we have yet to completely understand.

Shadow on Bright B Ring
thetonster      
07-29-2009  20:59:36

Carolyn, PIA11544, or Cas5689-13230-2 seems to show a brightening in the widest part of Epimetheus’ shadow. I don’t recall any through-holes in any pictures of that little ice ball, nor did they reveal it to be washer-shaped. Pray tell, how can a shadow behave this way? Is Epi the same angular size as the Sun just now, and therefore this becomes an interior diffraction spot? It is mighty intriguing.

Enceladus' Jets
thetonster      
03-08-2009  18:06:37

Quickly now, before the Mars-faceites see it; there’s a face in southern Enceladus, too. Note the most-tilted, Norternmost spike as it rotates past center; a little below it, a rather morose face seems to be embedded in the ripples. We know it is a chance collection of Ice ridges and grooves, of course; but sure as shootin’ the von Däniken followers will find this one too: and who knows what Alien Race they’ll invoke to explain it?
On another Cassini target, I’d like it if our fearless imaging team would take more pictures of Hyperion; not necessarily in a zoom-by, but merely to verify an assertion made a few years ago in the literature, that Hyperion’s rotation is chaotic. Does that outsize sponge rotate, or does it trip and stumble as it orbits?