[AZ-Observing] Re: Time-lapse of Callisto Eclipsing Ganymede this Morning

  • From: Sam Rua <sam@xxxxxxxxxxx>
  • To: "az-observing@xxxxxxxxxxxxx" <az-observing@xxxxxxxxxxxxx>
  • Date: Sat, 24 Jan 2015 09:19:56 -0700

Very cool. Now that is some serious dedication to capture an eclipse within a 
different planetary system. Makes our efforts to get a lunar eclipse here seem 
very tame by comparison. 

Sent from my iPad

> On Jan 23, 2015, at 6:42 PM, Tom Polakis <tpolakis@xxxxxxx> wrote:
> 
> As we pass through the orbital plane of Jupiter's moons, there are plenty of 
> mutual events, both occultations and eclipses.  The deepest and most 
> favorable of these events occurred this morning, when Callisto's shadow 
> covered more than 80 percent of Ganymede.  The geometry was such that the 
> distance between Callisto and Ganymede was 1.6 million miles at the time of 
> the eclipse.
> 
> Seeing was very unsteady this morning, but I gave it a shot with the webcam 
> this morning.  I used a 15-inch with a 2x Barlow lens, and further doubled 
> the scale in the post-processing.  This time-lapse series runs 19 minutes, 
> and used a 1-minute interval between the finished frames.  The shadow passed 
> north of (above) center, which is evident in the sequence.
> 
> I'd complain more about the seeing conditions on this January night, but it 
> could be worse; we could be in Buffalo.
> 
> http://www.pbase.com/polakis/image/158918439/original
> 
> Tom
> 
> 
> 
> 
> --
> See message header for info on list archives or unsubscribing, and please 
> send personal replies to the author, not the list.
> 
--
See message header for info on list archives or unsubscribing, and please 
send personal replies to the author, not the list.

Other related posts: