[AZ-Observing] Re: Time-lapse Animation of Ganymede Eclipse
- From: Michael Collins <cal_donley@xxxxxxx>
- To: az-observing@xxxxxxxxxxxxx
- Date: Sat, 17 Nov 2012 23:46:35 -0700
On 11/17/12 23:15, Tom Polakis wrote:
> 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.
Excellent work. I observed a number of Jovian satellite events in the
'80's as part of a program coordinated by Jim Stamm. The differences in
the disappearance and reappearance times of the different satellites is
striking. Since all of my observations back then were made with a 200 mm
f/6 Newtonian, I was never able to resolve the disks of the satellites
as in the video.
Were these individual frame captures or stacks of multiple images?
On a side note, it's good to see some results from the C11.
-- Mike --
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cal_donley@xxxxxxx
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