[AZ-Observing] Re: jupiter shadow transit photos

  • From: Tom Polakis <tpolakis@xxxxxxx>
  • To: az-observing@xxxxxxxxxxxxx
  • Date: Sun, 25 Jan 2015 13:15:36 -0500

---- Stan Gorodenski <stanlep@xxxxxxxxxxxxx> wrote: 
> The image description says three shadows, but I see a fourth. Is that a 
> shadow?

Callisto's albedo is so low (20%, still higher than Earth's moon) that it looks 
like a shadow during a transit.  In this case, Callisto followed its shadow 
onto the disc.

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