Re: Ganymede transit - was there a cast shadow too?

From: P T Chambers (ptchamb@No-Spam)
Date: Tue Dec 25 2001 - 18:12:50 MST

  • Next message: glennhirsch@No-Spam: "Re: Ganymede transit - was there a cast shadow too?"

    Hi Glenn
    Yes, If the moon is over Jupiter from our perspective, it can easily be
    harder to see than the shadow. The shadows usually stand out in stark
    contrast to the surface of Jupiter.

    ---------
    Phil Chambers [ptchamb@No-Spam] (S.F. Bay Area - Calif. USA)

    On Tue, 25 Dec 2001 glennhirsch@No-Spam wrote:

    >
    > Last night @ 1230am in SF using an 8" dobs with a tak le 7mm eypiece,
    > I spied Jupiter through a brief cloud hole -- I had a surprisingly steady
    > view @ 175x showing Ganymede's tiny black disk just above the red
    > spot.
    >
    >
    >
    > I thought I also saw the moon's cast shadow -- did I? Is a cast shadow
    > visible during a transit in addition to a moon's silhouette?
    >
    > Glenn Hirsch
    >

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