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Thread: Cassini image: is that a shepherd moon?

  1. #1
    Join Date
    Nov 2001
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    20

    Cassini image: is that a shepherd moon?

    Take a look at this raw ring image. Midway to lower right corner from center, just inside G Ring, I can see what looks like a crescent asteroid. Is that one of the shepherd moons (e.g. Pandora), or just lens debris?

  2. #2
    Join Date
    Sep 2003
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    3,029
    Well, it cannot be Pandora, since it orbits outside the F-Ring. But it can be Prometheus, which orbits inside the ring and is very elongated in shape. It may also be a image defect or something.

  3. #3
    Join Date
    Feb 2004
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    262
    I noticed it too

    Im pretty sure its a feature in the rings as it reamains in the same position in the sequence of wide angle shots of that area of the rings, a dust spot etc would change position

    http://saturn.jpl.nasa.gov/multimedi.../W00000384.jpg

    http://saturn.jpl.nasa.gov/multimedi.../W00000376.jpg

  4. #4
    Join Date
    Apr 2004
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    And it seems to be correctly illuminated...

  5. #5
    Join Date
    Dec 2003
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    Here's a picture of Pan. The webpage has a link to a movie that "shows the moons Prometheus (102 kilometers or 63 miles across), Pandora (84 kilometers or 52 miles across), Pan and Atlas (32 kilometers or 20 miles across)."

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