CICLOPS: Cassini Imaging Central Laboratory for OPerationS

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Imaging Diary - Cassini

 
8/21/17
Saturn-lit Tethys
PIA21342
 
1/23/17
Here's Lookin' at You, Tethys
PIA20518
 
7/11/16
Tethys Tops Saturn
PIA20488
 
1/18/16
Janus and Tethys
PIA18353
 
12/7/15
Crescent Tethys and Rings
PIA18348
 

 

 
7/29/15
The Colors of Tethys II
PIA19638
 
7/29/15
Red "Cat Scratches" on Tethys
PIA19637
 
7/29/15
The Colors of Tethys I
PIA19636
 
7/27/15
Bright Basin on Tethys
PIA18329
 
6/15/15
Tethys ‘Eyes’ Saturn
PIA18318
 

 

 
6/8/15
Tethys the Target
PIA18317
 
12/15/14
Tethys the Spy
PIA18293
 
11/4/14
Color Maps of Tethys - November 2014
PIA18439
 
7/28/14
Tethys in Sunlight
PIA18275
 
5/19/14
Tethys' Terrains
PIA17164
 

 

 
11/26/12
Tiny Tethys
PIA14636
 
11/14/12
Tethys Polar Maps - June 2012
PIA14932
 
11/14/12
Map of Tethys - June 2012
PIA14931
 
5/21/12
Tethys 'Rev 166' Raw Preview #1
 
5/21/12
Tethys 'Rev 166' Raw Preview #4
 

 

 
5/21/12
Tethys 'Rev 166' Raw Preview #3
 
5/21/12
Tethys 'Rev 166' Raw Preview #2
 
4/16/12
Tethys 'Rev 164' Raw Preview #4
 
4/16/12
Tethys 'Rev 164' Raw Preview #3
 
4/16/12
Tethys 'Rev 164' Raw Preview #2
 

 

 
4/16/12
Tethys 'Rev 164' Raw Preview #1
 
12/20/10
Titan and Tethys
PIA12745
 
11/30/10
Geology on Tethys
PIA12802
 
11/30/10
Tethys Polar Maps - August 2010
PIA12799
 
11/30/10
Map of Tethys - August 2010
PIA11673
 

 

 
8/30/10
Tethys Before Titan
PIA12709
 
8/14/10
Tethys "Rev 136" Raw Preview #1
 
8/14/10
Tethys "Rev 136" Raw Preview #2
 
8/14/10
Tethys "Rev 136" Raw Preview #3
 
8/14/10
Tethys "Rev 136" Raw Preview #4
 

 

 
8/14/10
Tethys "Rev 136" Raw Preview #5
 
7/14/10
Melanthius on Tethys
PIA12676
 
6/30/10
Tethys and Darker Dione
PIA12666
 
6/9/10
Tethys in the Fore
PIA12651
 
6/7/10
Rings and Quarter Tethys
PIA12649
 

 

 
5/7/10
Big Ding on Tethys
PIA12628
 
5/3/10
Dione Sliding By Tethys
PIA12624
 
4/14/10
Up and Down Tethys
PIA12611
 
2/9/10
Tethys Polar Maps - February 2010
PIA11698
 
2/9/10
Map of Tethys - February 2010
PIA12560
 

 

 
1/25/10
Passing Tethys
PIA12534
 
1/15/10
Tethys Slips Behind Titan
PIA12528
 
1/4/10
Enceladus Behind Tethys
PIA12523
 
9/3/09
Tethys' Northern Crater
PIA11572
 
8/6/09
Eye on Tethys
PIA11552
 

 







Imaging Diary - Voyager

 
10/14/07
Saturn With Tethys and Dione
PIA00024
 
10/14/07
Saturn and its satellites Tethys, Enceladus and Mimas
PIA01383
 
10/14/07
High resolution view of Tethys
PIA01386
 
10/14/07
Pictures of Tethys' large crater
PIA01385
 
10/14/07
Photograph of Saturns' satellite Tethys
PIA01397
 

 

 
10/14/07
Saturn - large crater on Tethys
PIA01398
 
10/14/07
Saturn's moon Tethys
PIA01399
 
10/14/07
Cratered surface of Tethys
PIA01974
 
10/14/07
Saturn - Tethys from 594,000 kilometers (368,000 miles) away
PIA01392
 
10/14/07
Tethys
PIA02276
 

 

 
10/14/07
Saturn and Four Icy Moons, Enhanced Color
PIA00349
 
10/14/07
Saturn and Four Icy Moons in Natural Color
PIA00400
 
10/14/07
Saturn System Montage
PIA01482
 
10/14/07
Saturn taken from Voyager 2
PIA01364
 
10/14/07
Collage of Saturn's smaller satellites (PIA01954)
PIA01954
 

 






Newsroom - Press Releases

 
ENCELADUS AND TETHYS RAW IMAGE PREVIEW FROM CASSINI - Apr 16, 2012
 ... April, 16, 2012 ENCELADUS AND TETHYS RAW IMAGE PREVIEW FROM CASSININASA's ... of the icy moons Enceladus and Tethys during its course through the ... encounter, Cassini passed the moon Tethys with ...


 
UNUSUAL RED ARCS SPOTTED ON ICY SATURN MOON - Jul 29, 2015
 ... the surface of Saturn's icy moon Tethys in new, enhanced-color images ... to show large northern areas of Tethys under the illumination and viewing ... result of outgassing from inside Tethys. They ...


 
CASSINI'S DOUBLEHEADER FLYBYS SCORE HOME RUN - Sep 30, 2005
 ... back-to-back flybys of Saturn moons Tethys and Hyperion last weekend, coming ... than ever before to each of them. Tethys has a scarred, ancient surface, ... http://www.nasa.gov/cassini.Images of Tethys ...


 
CASSINI SHOWS GRANDEUR OF TWO SATURN MOONS - Nov 23, 2004
 ... views of Saturn's moons Titan and Tethys represent the most detailed look ... the battered and cratered moon Tethys. The result is the best-ever ... moon. As seen here, the surface of Tethys has a ...


 
CASSINI FINDS WARM CRACKS ON ENCELADUS - Nov 30, 2010
 ... Cassini swooped by the icy moon Tethys, collecting images that helped fill in gaps in the Tethys global map. Cassini's new views ...



Result Page: 1 2  Next





Newsroom - Special Events

 
Tethys 'Rev 277' Raw Preview - Jun 8, 2017
 ... his raw, unprocessed image of Tethys was taken on June 6, 2017 and ...


 
The Colors of Tethys - Jul 29, 2015
 ... the surface of Saturn's icy moon Tethys in new, enhanced-color images ...


 
Methone and Tethys Rev 166 Raw Preview - May 21, 2012
 ... 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 ...


 
Enceladus and Tethys Rev 164 Raw Preview - Apr 16, 2012
 ... 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 ...


 
Mapping Enceladus and Tethys - Nov 30, 2010
 ... released a new map of the moon Tethys. (News release can be found h ...


 
Titan Rev 139 Raw Preview - Oct 20, 2010
 ... Saturn's rings and the smaller moon Tethys are also seen here. The abrupt ...


 
Enceladus, Tethys and Dione Rev 136 Raw Preview - Aug 14, 2010
 ... taken of Saturn's moons Enceladus, Tethys and Dione on August 13, 2010 and ...


 
Tethys Flyby Raw Preview - Jun 29, 2007
 These raw, unprocessed images were taken during Cassini's close flyby of Tethys on June 27, 2007.


 
Craters and Chasms on Tethys - Sep 29, 2005
 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 moons cratered landscape and a look into the gargantuan canyon system called Ithaca Chasma.


 
Tethys Flyby Raw Preview - Sep 26, 2005
 These raw, unprocessed images were taken during Cassini's very close flyby of the icy moon Tethys on September 24, 2005.







Home - Captain's Logs

 
Spectacular Sights at 10 AU - Dec 22, 2005
 ... too is largely a cratered body. Tethys, like Iapetus, boasts enormous ... crack, Ithaca Chasm, for which Tethys is renowned is an ancient and ...


 
The Day the Earth Smiled - Nov 12, 2013
 ... and to the right of Enceladus is Tethys, a moon about a third the size ...


 
Nature's Canvas - Nov 29, 2004
 ... Enceladus, Dione, Rhea, and Tethys as never before ... mere tastes ...







Maps

 
11/4/14
Color Maps of Tethys - November 2014
PIA18439
 
11/14/12
Tethys Polar Maps - June 2012
PIA14932
 
11/14/12
Map of Tethys - June 2012
PIA14931
 
8/6/08
The Tethys Atlas
PIA11008
 
11/4/14
Color Maps of Mimas - November 2014
PIA18437
 

 






Artroom

 
1/11/10
Ithaca Chasma on Tethys
 
1/11/10
Mimas/Tethys Eclipse
 

 

 
12/30/14
Coasting Above the Rings
 
12/28/06
Saturn from the Vicinity of Dione
 

 

 
12/28/06
From Polar Orbit





Newsroom - Looking Ahead

 
Rev277-278 - May 17, 2017
 


 
Rev269-270 - Apr 3, 2017
 


 
Rev265-266 - Feb 25, 2017
 


 
Rev259-260 - Jan 13, 2017
 


 
Rev251-253 - Nov 18, 2016
 








Alliance Member Comments


Against a Hail of Stars
Mercury_3488      
2008-08-10 07:53:17

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I agree completely, bruno.thiery, I've researched what the background sky was, forming a backdrop for Tethys. This image was obtained back in June on the final day of the Primary Mission of the Cassini Spacecraft, which has now been extended to Wednesday 30th June 2010. Tethys is seen here, in the shadow of Saturn, but dimly lit by reflected sunlight from Saturn's rings & other moon. Dione is off the frame to the bottom left & I wonder if Dione is responsible for most of the weakillumination of Tethys? The stars in the background ar within the far north of the constellation of Bootes close to the stars Merez / Rho Bootis & Upsilon Bootis. The red giant star Arcturus / Alpha Bootis is way out of the frame to the lower right. I really hope we get to see a lot more of these sort of obervations. Andrew Brown.


Tethys: Leading Hemisphere
Red_dragon      
2008-07-15 10:23:36

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Great image, perhaps one of the best Tethys images you've released; I like her Mimas/eye/Death Star look.


Enceladus '61EN' Flyby Raw Preview #2
Mercury_3488      
2008-03-14 06:53:13

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Cheers anne v. Yes the left hand 'crescent' lit by Rhea & the right hand 'crescent' lit by Tethys & Dione are quite easy to see, despite the bright 'gibbous' from sunlight reflected of Saturn's rings. So clearly Enceladus is still being lit by reflected sunlight from several objects within the Saturn system & the double northern horns of the opposing crescents is interesting. Really quite eerie & alien. On a few of the raw images are showing the eclipsed Enceladus in front of the trailed stars of the Camelopardalis / Ursa Minor border, whilst Cassini tracked the eclipsed ice covered moon. Absolutely fantastic stuff. Andrew Brown.


Enceladus '61EN' Flyby Raw Preview #2
anne v      
2008-03-13 21:56:16

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Yes, this image was obtained while Enceladus was indeed in eclipse, illuminated by sunlight reflected first from Saturn's rings then onto the planet and finally onto the moon. Portions of Enceladus are also lit by scattered light from nearby Tethys, Dione, and Rhea, although not as brightly as by Saturn's reflected ringshine.


The Rays of Rhea
Mercury_3488      
2008-03-01 20:37:22

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Hi Red_dragon, It is so interesting to see how different the individual moons are within a particular system. With Saturn's system, the difference between Titan & Mimas is most striking. Phoebe almost certainly is an interloper from the KBO, Hyperion is just odd, Enceladus, highly active, Dione also probably moderately active, Tethys, Rhea, & Mimas as dead as door nails. Iapetus is extremely fascinating for other reasons. I suspect the Uranian moons had more radiactive elements & it is interesting to see, how much denser Titania & Oberon are to Saturn's similarly sized moons Rhea & Iapetus. Clearly the Saturn & Uranus systems have evolved very differently. I like your comparison of the differences between Io & Callisto in the Jovian system. True, Jupiter's immensely gravity & tidal influences have much to do with this. Even so, Io is poor in volatiles, but heavily differentiated & contains a large amout of heavy materials (Io has the highest density & surface gravity of the solar system's moons). Callisto appears to be a mixture of rock & ice, with a slight concentration of rock towards the centre, but not enough to form a core. Probably much like Rhea, which appears to be much like a smaller Callisto. Andrew Brown.


The Rays of Rhea
Mercury_3488      
2008-02-24 15:31:10

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Hi Red_dragon. I suspect in the case of Rhea, it is lighter less space weathered ice being deposited over older more space weathered ice. Rhea appears to have had no internal geological activity, the entire surface appears to have been effected by impact events. I use the word appears, as in the images I have & have seen, can see no evidence for anything else other than impacts. Many of Saturn's moons appear to have had varying degrees of geological activity to varying degrees. Enceladus & Titan: extensive. Dione: moderate overall, extensive in a few locations. Iapetus: Some, the giant equatorial ridge of the Voyager Mountains. Tethys: Little, smoother equatorial regions, Ithaca Chasma, little else. Rhea & Mimas: None as far as I can tell, only impact cratering. Rhea appears to be a bit of an odd ball in this respect. Rhea is a large object that appears to have had little other than impacts happen to it. Rhea is similar in size to the Uranus moons Titania & Oberon, as well as Iapetus. In descending diameter size order below: Titania: 1,578 KM. Largest moon of Uranus. Density: 1.70 Grammes cm/3 Comments: Giant canyons, smoother subdued craters in places, possibly previous cryovolcanism, possibly very tenuous atmosphere. Rhea: 1,528 KM. Second largest moon of Saturn. Density: 1.33 Grammes cm/3. Comments: Little has happened apart from impact cratering. Oberon: 1,522 KM. Second largest moon of Uranus. Density: 1.64 Grammes cm/3. Comments. Like Rhea has experienced extensive cratering. Unlike Rhea, has tall mountains & has had experienced cryovolcanism & like Titania possible limited tectonic activity. Possibly a very tenuous atmosphere. Note Oberon's average diameter is only 6 KM less than Rhea's, but is somewhat more massive due to higher density. Iapetus: 1,436 KM. Third largest moon of Saturn. Density: 1.21 Grammes cm/3. Comments. Odd ball moon. Dark leading, bright trailling hemispheres. Huge equatorial mountain range, some peaks almost as tall as those on Mars & Io. I suspect Rhea's lesser density (greater ice to rock ratio) may explain lack of geological activity. Andrew Brown.


Coming to Light
Mercury_3488      
2008-02-17 10:20:16

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Once again, thank you very much Carolyn. 3488 is strange, I agree completely 100% with you. No secret I'm happy to explain. Due to my troubled youth with my condition (High Functioning Autistic), it was thought that I could never live outside of sheltered housing. Well I proved them all wrong. Got my own flat & 3488 was my first ever PIN for my bank account, so that number has real significance. Not only that it is easy to remember & as there is no other 3488 on any message board on the web, I am easy to find. Back to Sector 6. I like the idea of placing Cassini inside of the D Ring. A variant if possible, could Cassini be placed into a very close polar orbit around Saturn? Twice each orbit the rings would be approached very closely, enabling high resolution imaging, both back & front, whilst global weather monitoring would be doable. A bit like the JUNO mission to Jupiter & would be able to compare JUNO results directly with Saturn. I still aim for the Northern Summer Solstice though with the mission carrying on as is. Hopefully we will still get many more Titan, Enceladus & Dione encounters in. Shame we cannot revisit Iapetus & Phoebe due to DeltaV issues (it would be scientifically very valuable to encounter ex KBO Phoebe again, but with the opposite side facing Cassini at closest approach). Are we likely to get a very close encounter with Mimas & / or Janus, Prometheus, the Dione & Tethys co-orbitals? It is great talking with you. Andrew Brown.


Cosmic Blasting Zone
Mercury_3488      
2008-02-16 07:57:58

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I've sometimes wondered about this also. Hyperion is the least dense of the known solid bodies in the entire solar system, only 0.55g cm3. This suggests a rubble pile held together by gravity & / or a more coherent body with huge internal voids. My bet is the rubble pile. Like polystyrene, it is possible to punch deep but narrow holes in it. We see similar here on Hyperion. I had seen one suggestion bantered about elsewhere (not my idea), that Titan formed in a heliocentric orbit at one of Saturn's lagrange points & over time, Titan was drawn towards Saturn. Hyperion was suggested to be Titan's former moon. The mass ratio between Hyperion & Titan is identical to that of Dione with Polydeuces & Helene as well as Tethys with Telesto & Calypso. These facts were part of a thought exercise elsewhere. Hyperion being a former comet is an interesting idea. Remember that Phoebe is almost certainly a captured comet / KBO. Also remember the floors of these deep craters are dark, so they absorb the very little solar energy there is & can burn through the ice. I am sure there are a whole multitude of reasons for Hyperion's weird situation. A most fascinating object.


Rebounded Craters
Red_dragon      
2008-01-25 15:52:13

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Fantastic image. That huge southern basin is interesting; it seems to have a size similar to Odyseeus in Tethys, yet is not "sank" on the moon as that and it SEEMS to have an inner ring of mountains.


Parade of Moons
Red_dragon      
2007-10-09 01:11:29

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Amazing, as many other NAC shots, how Tethys and Rhea seem to be estacked together.







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