CICLOPS: Cassini Imaging Central Laboratory for OPerationS

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Imaging Diary - Cassini

 
6/11/14
Arrival and Departure at Phoebe
PIA18411
 
4/26/12
Phoebe in the Round
PIA15507
 
4/26/12
The Face of Phoebe
PIA06064
 
3/27/06
Phoebe: Cartographic Projections
PIA07796
 
12/22/05
Map of Phoebe - December 2005
PIA07775
 

 

 
6/23/04
The True Shape of Phoebe
PIA06070
 
6/23/04
Phoebe Hi-Res Mosaic
PIA06073
 
6/14/04
Peering at Phoebe
PIA06072
 
6/13/04
Crater Close-up on Phoebe
PIA06068
 
6/13/04
Phoebe's Surprise
PIA06067
 

 

 
6/13/04
The Face of Phoebe
PIA06064
 
6/12/04
Phoebe Rotation Movie
PIA06065
 
6/10/04
Countdown to Phoebe
PIA06063
 
6/9/04
Closing in on Phoebe
PIA06062
 
12/23/13
Yin and Yang
PIA17142
 

 

 
4/26/12
Skyline View
PIA06075
 
4/26/12
Battered Moon
PIA06066
 
6/27/05
Spots on Janus
PIA07529
 
2/24/05
Phoebian Explorers
PIA06117
 
6/14/04
Skyline View
PIA06075
 

 

 
6/14/04
A View to the South
PIA06074
 
6/14/04
Dark Desolation
PIA06069
 
6/12/04
Battered Moon
PIA06066





Imaging Diary - Voyager

 
10/14/07
Saturn's outer satellite, Phoebe
PIA01965
 
10/14/07
Voyager 2 Movie of Saturn's Moon: Phoebe
PIA02260
 
10/14/07
Saturn's outer satellite - Phoebe
PIA02229
 
10/14/07
Iapetus Bright and Dark Terrains
PIA00348





Newsroom - Press Releases

 
CLOSING IN ON PHOEBE - Jun 9, 2004
 ... enigmatic moons. Cassini will fly by Phoebe, Saturn's largest outer moon, ... opportunity during the mission to study Phoebe at close range," said Dave Seal, ... Laboratory (JPL), Pasadena, Calif. ...


 
CASSINI FINDS SATURN MOON HAS PLANET-LIKE QUALITIES - Apr 26, 2012
 ... Cassini mission reveal Saturn's moon Phoebe has more planet-like qualities ... had their first close-up look at Phoebe when Cassini began exploring the ... and geology, scientists found Phoebe was ...


 
CLUES TO PHOEBE'S ORIGINS - Jun 14, 2004
 ... 2004-149 June 14, 2004 PHOEBE'S SURFACE REVEALS CLUES TO ITS ... close flyby of Saturn's moon, Phoebe, have yielded strong evidence ... 1,600 feet) thick. The surface of Phoebe is also heavily ...


 
FEATURES ON SATURN'S MOON PHOEBE NAMED - Feb 24, 2005
 ... 2005FEATURES ON SATURN'S MOON PHOEBE NAMEDTwenty-four of the largest craters on Phoebe, the small, retrograde outer moon ... Astronomical Union.Two image montages of Phoebe, the first stop in the ...


 
BATTERED MOON - Jun 12, 2004
 ... 12, 2004 CASSINI'S FLYBY OF PHOEBE SHOWS A MOON WITH A BATTERED PAST ... images from the Cassini flyby of Phoebe reveal it to be a scarred, cratered ... this.""What we are seeing is very neat. ...



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Newsroom - Special Events

 
Arrival and Departure at Phoebe - Jun 11, 2014
 As it entered the Saturn system, NASA's Cassini spacecraft performed its first targeted flyby of one of the planet's moons. On June 11, 2004, Cassini passed Phoebe, the largest of Saturn's outer or "irregular" moons, at an altitude of just 1,285 miles (2,068 kilometers).


 
Phoebe: A Captured Planetesimal - Apr 26, 2012
 ... look at Saturn's irregular moon, Phoebe, and finds it to be an interloper ... Cassini's 2004 encounter with Phoebe are included here ...


 
Closest Approach to Phoebe - Jun 1, 2004
 Images collected during the closest approach to Phoebe on June 11, 2004 are already starting to provide insights into the history of this dark outer moon of Saturn.







Home - Captain's Logs

 
Approach to Saturn Begins - Feb 27, 2004
 ... close, 2000-kilometer approach to Phoebe, collecting detailed images as ... by. At 220 kilometers across, Phoebe is the largest of Saturn's outer ...


 
Iapetus Up Ahead - Dec 30, 2004
 ... an even more distant moon, like Phoebe, and slowly evolved inward towards ...


 
Cassini Sights Saturn - Nov 1, 2002
 ... encounter with the small moon Phoebe, believed to be a captured asteroid, ...







Maps

 
3/27/06
Phoebe: Cartographic Projections
PIA07796
 
12/22/05
Map of Phoebe - December 2005
PIA07775





Newsroom - Looking Ahead

 
Rev244 - Sep 15, 2016
 


 
Rev239 - Jul 18, 2016
 


 
Rev235 - Apr 27, 2016
 


 
Rev226 - Nov 3, 2015
 


 
Rev219 - Jul 2, 2015
 



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Alliance Member Comments


Crater Close-up on Phoebe
wmdewease      
2011-07-08 10:35:05

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Phoebe looks like target practice for the solar system. Looking at the various pictures and by observation, it appears that the craters begin to "fill in" faster than other craters on other moons in the solar system. Am I imagining this or is there something to what I see?


Somersaulting Moon
Mercury_3488      
2011-01-12 12:39:36

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Hi lsludwig1, Yes I agree, Hyperion is very curious. One idea is that the deep fluted craters are due to normal craters being deepened by the dak dusty floors absorbing what little sunlight is out here & 'burning' a deeper hole, giving Hyperion the peculiar sponge like appearance. Also Hyperion is the least dense 'solid' body at only 0.55 Gcm3, just over half that of solid H2O ice, suggesting that Hyperion is an icy rubble pile held together by gravity. Certainly sopme asteroids are like this, main belt asteroid 253 Mathilde certainly so, rather carbonaceous materials rather than ice, the Mars moon Phobos (possibly Deimos too) & the Jupiter moon Amalthea. Phoebe appears coherent as does the main belt asteroid 21 Lutetia, so not all 'small' bodies are rubble piles, but Hyperion almost certainly is. Whether or not Hyperion is a captured comet is open to question, where as Phoebe most certainly is. Shame we cannot get another close pass of Phoebe, but I think we will see Hyperion again with Cassini. Hi Carolyn, Do we know when yeaterday's Rhea imagery will be avaliable? Hope Cassini has not gone into safing. Andrew Brown.


Rev133
Mercury_3488      
2010-06-21 16:06:46

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Myself I would rather use any excess fuel for a close pass of fascinating Dione or Mimas or one of the lesser known inner moons like Prometheus, Pandora, or a co orbital like Helene, Ploydeuces, Telesto or Calypso. We have had loads of Titan & Enceladus, so a close pass of one of the lesser known ones would be nice. Shame we cannot do Iapetus or Phoebe again, as far too far out.


Thermal Runaway Model
mipsandbips      
2009-12-22 18:15:20

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thanks carolyn, given that you are correct, of course, 'thermal' would not necessarily mean a volcanic eruption. Interesting also that you mention, in how the dust ring about Phoebe being of keen interest as well, I imagine that particular interest may be for a number of reasons also!


Thermal Runaway Model
carolyn      
2009-12-13 08:16:15

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mipsandbips: But there's no evidence for a massive volcanic explosion. If that were the case, you'd see craters that were partially buried. And the pattern wouldn't necessarily look like what we see. Computer models have verified that general outline you would see from a dust-initiated thermal runaway effect, and they agree beautifully with the observed pattern. Finally, a dust ring has just been found associated with Phoebe, an outer Saturnian satellite. That dust is making its way into Iapetus' orbit. So all holds together beautifully.


Phoebe Rotation Movie
Mercury_3488      
2008-12-28 17:51:51

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Although Phoebe orbits Saturn in a retrograde direction, looks like the rotation on the axis is prograde. Will be very interesting indeed to compare the fantastic Cassini Phoebe encounter with the New Horizons imagery & spectra of the Pluto moons Nix & Hydra (though Phoebe is very much larger than both). I still reckon Cassini beat New Horizons to imaging a KBO in close up. Unless we think Triton is a captured KBO by Neptune, then Voyager 2 wins. Eris, Triton & Pluto (that order of descending size & mass), still to me appear to share a common origin in the Kuiper Belt, just that Eris & Pluto are the largest. Does Phoebe share a common origin too with them?? Andrew Brown.


Enceladus "Rev 91" Flyby Raw Preview #2
Mercury_3488      
2008-11-01 17:06:47

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Thank you very much John. Yes I also think that Titan's rotational axis is perpendicular to the orbital plane. I can see that the difference in dates is only a matter of a few weeks at most. 20' of arc difference in rotational axis, that is very minor even in a 29.5 year long 'year'. I have run the sequence through Redshift 5 & the 11th August does indeed match up with Saturn & the Titan Equinox appears to be on the 5th August, so about a week ahead of Saturn's. If you are interested, I ran through the Equinox for Iapetus with a fairly large inclination of 14 degrees 45' & the equinox occurred way back on 31st March 2007, 19 months ago already!!!!!!! Also did Phoebe, Equinox was even further back on 1st September 2006. So for these two, Northern Spring began quite a while ago already. Looking forward to seeing the rest of the images, particularly the close up SKEET ones. Andrew Brown.


Crater Close-up on Phoebe
Dragon_of_Luck_Mah_Jonng1971      
2008-10-11 16:20:41

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What a good luck that Phoebe was so closed to Cassini when the spacecraft approached Saturn - this encounter was before SOI and no other flybys of Phoebe are planned. Even no ones in the Extended Mission. If Phoebe had been at its opposite point of its orbit then this Image would not have been possible. Cassini made a fantastic engineering action obtaining this image with no image smear ! This Image shows that even rather small Phoebe has got a complicated history of its surface, I suppose.


The Face of Phoebe
Dragon_of_Luck_Mah_Jonng1971      
2008-10-11 16:10:24

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That is Phoebe in full view ! It appears to be a primitive, unmodified body captured by Saturn. Because of its actual orbit. It is ice-rich because it appears bright. But it has got also a coating of darker material. I think it was a Trans-Neptunian Body, an icy 'planetesimal' , before having been captured. It's the smallest Saturnian satellite that is 'mid-sized or large' by my classification.


Profile of Janus
Mercury_3488      
2008-08-14 06:51:30

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Great image. Saw this once before as a shadowy noisey raw image. It's great to see that some of the smaller moons are also being researched like Hyperion, Janus, Epimetheus, Helene, Telesto, Phoebe, etc. Wonder if Janus is like Epimetheus, an icy rubble pile held together by gravity? Does anyone know when the Helene encounter will be? Is there any chance of a close passes of Calypso, Telesto (again) Polydeuces, etc? Andrew Brown.


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