[AZ-Observing] Re: Time-lapse Animation of Ganymede Eclipse
- From: Dan Heim <dan@xxxxxxxxxxxxx>
- To: az-observing@xxxxxxxxxxxxx
- Date: Sun, 18 Nov 2012 09:20:19 -0700
Excellent work as always, Tom. At first I was surprised at how large the
disc of Ganymede appeared, until I noted the focal length you used. I've
watched the gradual dimming at lower mags on many occasions, but it was
pretty cool to actually see the disc goes through "phases" as it was
eclipsed. -Dan
> ________________________________________
> From: az-observing-bounce@xxxxxxxxxxxxx [az-observing-bounce@xxxxxxxxxxxxx]
> on behalf of Tom Polakis [tpolakis@xxxxxxx]
> Sent: Saturday, November 17, 2012 11:15 PM
> To: AZ-Observing@xxxxxxxxxxxxx
> Subject: [AZ-Observing] Time-lapse Animation of Ganymede Eclipse
>
> Using a C11 at 7000mm of focal length, the 1.8 arcsecond disc of Ganymede is
> 11 pixels in diameter in my Webcam. That's large enough to show the partial
> phases of an eclipse by Jupiter's shadow. Here are 26 monochrome frames,
> each taken 30 seconds apart, and strung into an animation.
>
> http://www.pbase.com/polakis/image/147376394
>
> Tom
> --
>
>
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