... of Saturn's moons Methone and Tethys on May 20, 2012.With a close-approach ... Cassini flew by the larger moon Tethys at a distance of about 34,000 ... that encounter are included here. Tethys is 660 ...
... of Saturn's moons Enceladus and Tethys were taken on April 14, 2012, ... encounter, Cassini passed the moon Tethys with a closest approach distance ... Cassini's best imaging encounter with Tethys ...
A recent tweak to Cassini's trajectory allowed an even closer approach of 1,500 kilometers (930 miles) to the Saturnian moon, Tethys, than originally planned, and yielded unrivaled views of the icy moon’s cratered landscape and a look into the gargantuan canyon system called Ithaca Chasma.
This view is 'Voyager class' by my opinion. ( It's not 'Cassini class' as e. g. 'Hi-Res on Tethys'. )
Nevertheless I'm seeing good details on it, mainly: The familiar crater at the left is showing here its depth easily; at the top and the lower left there are ( probably ) 2 parallel-running canyon systems that could be Ithaca Chasma; ( changing the curvature of the moon's limb at the lower left thus they're deep ) and a large crater at the top slightly right to the middle that is looking many more degraded than the familiar left one. The two parallel features ( I think ) are running through the mentioned crater at the top indicating that they're younger than it.
For me it's not a truely new view of Tethys but still of medium interest.
Very interesting image. It's also quite interesting to compare the basin that dominates this view of Dione with Tethys' huge crater Odysseus (for example, note how Odysseus seems to lack the internal ring Dione's basin has)
I agree; truly impressive that canyon. It's not Tethys' Ithaca Chasma, but still it's awesome. How deep and largue is? (by the way, I would not be surprised if it's discovered it was in the past a plume source)
It is reckoned that Enceladus has rolled over. Jupiter's moon Io is another point. Some of the larger plumes on Io like Tvashtar are in the higher latitudes than the equator.
Dione also appears to have extentional faults & graben too. It is thought that Dione is partially responsible, for the heating of Enceladu, but Dione too, appears to have been very active at some point. Dione is approx 30 times the mass of Enceladus. What caused Dione to be active? Rhea??????? Yet Rhea appears as dead as a dodo, with not much happening there other being cratered.
it's interesting to see the pattern outwards from Saturn.
Mimas. Inactive cratered.
Tethys. Inactive, cratered.
Dione, has been active, possibly still is on a small level.
Rhea. Second largest of Saturn's moons, inactive, cratered.
Titan. Possibly very active, with cryovolcanoes & tectonic activity.
Iapetus. Inactive, cratered, but with a huge equatorial mountain belt, possibly home to some of the highest peaks not on Mars & Io.
Some parts of the south polar region on Enceladus does resemble Europa in may respects, yet Europa is approx 500 times Enceladus's mass.
It is interesting to see how similar landforms appear on bodies that cover a woide range of size & mass.
Perhaps I was a bit blunt, but also perhaps I did not put my point across very well.
Yes, it's true that Tethys & Rhea do not have the geological impact that Titan, Enceladus, Dione & Iapetus have, & visually, yes, it's craters on craters on craters.
But yes also, they record the pasdt environment better than the active or recently active moons a lot better, as geological activity erases what's there before, so Tethys & Rhea are a huge bonus in this respect of recording what has happened within the Kronian system as a whole.
So yes I am very pleased to see that they are ALL being mapped properly now. Perhaps rather than boring, Tehtys & Rhea are probably the simplist large moons in the solar system. I think perhaps only the Uranian moon Umbriel out of the other large solar system moons is as simple??
I agree also with you on this bruno.
Compared to Enceladus, Dione & Iapetus, Tethys does come over as a bit of a bore.
True Ithaca Chasma does offer something else, but really there appears to be little else of interest. There appears to be a smoother band around the equator, but even that is craters on craters on craters.
IMO Rhea & Tethys are among the most boring larger moons in the solar system.
Their saving graces may be they record the environment of the conditions within the Saturn system over the last 4.56 GYrs.
It is good to see though that they are all being properly mapped. This is fundamental in understanding the evolution of the Saturn system.