Return to the Cloudy Nights Telescope Reviews home page


Observing >> Solar System Observing

Pages: 1
Ed D
Carpal Tunnel
*****

Reged: 04/30/10

Loc: Sunny South Florida
Anyone else catch the double transit this morning? new
      #6115318 - 10/03/13 02:29 PM

Weather down here in 'Sunny South Florida' continues to be horrendous. However, this morning at 4:30am (UT -4) wasn't that bad so I set up my little Vixen, made a cup of coffee, and started observing Jupiter through the only decent open spot in the sky. I noticed that one of the moons was near the planet and I was in for a little treat. What surprised me was when I realized that I was observing a double transit. Io's shadow was pretty distinct, while Ganymede's shadow was less prominent and a little harder to observe, at least in my 70mm achro and not so great conditions.

Good thing the clouds finally drifted enough to obscure my view of Jupiter. I didn't realize just how long I had been outside observing this double transit treat. I had to rush through my morning routine to try to make it to work on time.

So, was anyone else lucky enough to catch this?

Ed D


Post Extras: Print Post   Remind Me!   Notify Moderator  
Ed D
Carpal Tunnel
*****

Reged: 04/30/10

Loc: Sunny South Florida
Re: Anyone else catch the double transit this morning? new [Re: Ed D]
      #6115339 - 10/03/13 02:43 PM

There is a fantastic pic of the transit HERE in the Solar System Imaging forum.

Ed D


Post Extras: Print Post   Remind Me!   Notify Moderator  
C_Moon
Pooh-Bah
*****

Reged: 10/23/09

Loc: Beneath the arms of Cassiopeia
Re: Anyone else catch the double transit this morning? new [Re: Ed D]
      #6116167 - 10/03/13 09:55 PM

I also viewed this morning and thought it was a double shadow transit as well. Turns out it was Ganymede transiting and Io's shadow!

I have never seen a moon transit that was that dark before. Usually I "lose" the moons after shortly after they move past the limb.

I'm not sure if I ever saw a Ganymede transit before. Is it always that noticeable as it traverses the disk of Jupiter?

I did not notice that Ganymede was over Oval BA, but I did think that the shape of the transiting Ganymede was not quite circular, so perhaps I was seeing some detail of Oval BA superimposed next to Ganymede?

By the way, I also saw a prominent white spot (almost looked like a bubble to me) in the equatorial band. From looking at the image you linked to, I believe it was the large festoon/plume NE of the shadow.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Ed D
Carpal Tunnel
*****

Reged: 04/30/10

Loc: Sunny South Florida
Re: Anyone else catch the double transit this morning? [Re: C_Moon]
      #6117316 - 10/04/13 01:48 PM

Paul, you're right, it was Ganymede transiting and Io's shadow. I found a pic that was taken later than my observation. It showed the two moons off to the side of the planet, and Ganymede casting a shadow. It figures that I can't find it now! If I do come across it again I'll post a link.

In the transits I have observed the moons look like bright disks and the shadows are inky black. This is the first time I have observed a moon that looked a fuzzy pale grey.

I also noticed the feature right next to Ganymede, which later I identified as the Oval BA from the pic. Howver, I didn't see the white spot in my scope, but doubt I would have in a 70mm achro.

It was a great way to start the day, observing something I had not seen before.

Ed D


Post Extras: Print Post   Remind Me!   Notify Moderator  
Pages: 1


Extra information
1 registered and 3 anonymous users are browsing this forum.

Moderator:  Rich (RLTYS), star drop, dr.who 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled


Thread views: 244

Jump to

CN Forums Home




Cloudy Nights Sponsor: Astronomics