CICLOPS: Cassini Imaging Central Laboratory for OPerationS

Prometheus "Rev 125" Flyby Raw Preview
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Prometheus "Rev 125" Flyby Raw Preview
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  This raw, unprocessed image of Prometheus was taken by Cassini on Jan. 27, 2010.

The image was taken in visible light with the Cassini spacecraft narrow-angle camera. The view was obtained at a distance of approximately 36,000 kilometers (23,000 miles) from Prometheus and at a Sun-Prometheus-spacecraft, or phase, angle of 85 degrees. Image scale is 217 meters (713 feet) per pixel.

The Cassini Equinox Mission is a joint United States and European endeavor. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA's Science Mission Directorate, Washington, D.C. The Cassini orbiter was designed, developed and assembled at JPL. The imaging team consists of scientists from the US, England, France, and Germany. The imaging operations center and team lead (Dr. C. Porco) are based at the Space Science Institute in Boulder, Colo.

For more information about the Cassini Equinox Mission visit, and

Credit: NASA/JPL/Space Science Institute
Released: January 28, 2010
Image/Caption Information

Alliance Member Comments
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stowaway (Feb 3, 2010 at 8:16 AM):
An unusual camera angle. The images from December are far more definitive of Prometheus' true shape.
ajbock (Feb 1, 2010 at 4:26 AM):
To me, the left boundary of the "central bulge" looks like a "weld", where a somewhat smaller "moon" impacted and stuck. The ruduced cratering at that curved boundary may be shrouded to some extent by the accumulating ring "snow", but still seems like a reletively new "melded" feature. Just me?
Red_dragon (Jan 29, 2010 at 8:18 AM):
The alien look of Prometheus is at least fascinating...
mipsandbips (Jan 28, 2010 at 7:57 PM):
Up close, Prometheus resembles a fossilized tool carved by prehistoric man!
UweZ (Jan 28, 2010 at 1:57 PM):
You really can't fool me. The Jan. 28 image labeled "Prometheus -Rev 125" is really a well-done fried egg tossed in the air by an artistic cook.
carolyn (CICLOPS) (Jan 28, 2010 at 1:56 PM):
mic1303: The white specks are cosmic ray hits on the CCD detector...a well-known phenomenon.
carolyn (CICLOPS) (Jan 28, 2010 at 1:55 PM):
JimRinX: Picking up white fluffy stuff indeed....but not from Enceladus...from the F ring!!
mic1303 (Jan 28, 2010 at 1:41 PM):
Hi Team! Question. What are the white specks (?) in the background? They even appear to be on the moon itself. Are they ring particles? Prometheus almost looks transparent on one side! Great work!
JimRinX (Jan 28, 2010 at 1:12 PM):
I don't know which way 'forward' - orbitally speaking - is; but it almost looks like Prometheus is picking up some of white fluffy stuff from the Geysers on Enceladus; rather like Iapetus has been.
Too bad, that: I was hoping for a Giant Obelysk with a STAR GATE inside it, i don't know about you!
hondacivic21218 (Jan 28, 2010 at 12:41 PM):
Oh,yes....great work Cassini team!

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