Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.



Jupiter tonight - am I seeing the shadow of a moon?

Recommended Posts

Got the TAL-1 out tonight to look at Jupiter through the gaps in the clouds and I can see some moons and a black splodge on Jupiter itself. I assume this is the shadow of a moon, but which one?

This was also my first chance to try out my web-cam and I got this:


There's a dark splodge at 12o-clock and another fainter one at 10o-clock. Could they be the shadow of the moon on the left and the GRS respectively?

I think they were in roughly the same place through the eyepiece but the webcam turned the whole thing by 90 degrees (next time I will rotate the webcam till it matches what I actually see instead of just plonking it in there! It's all a learning curve. I was in a rush to try and get a video on the webcam before the clouds came over again so I had no time to look properly with my eyes.

Anyway, I'd like to know what the two splodges are and to identify the moons. I can't match up the image with what Stallarium shows me. Presumably Stellarium will show it straight when the eyepiece rotates it by 180 degrees.

--- Penguin

Share this post

Link to post
Share on other sites

According to stellarium Ganimede crossed it soon after sunset and Europa is crossing it right now.

Unfortunately every time I plan to see a moon transit on Jupiter I get full cloud coverage... A bit over a year in the hobby, with probably 10+ sessions per month and I'm yet to see a moon transit... :D

Share this post

Link to post
Share on other sites

It seams all it toke was a little rant! :D

The sky turned to partially cloudy and I managed to get a few minutes when Europa was finishing it's transit. The moon itself wasn't very easy to see, but there was a very pronounced shadow on the opposite side of the disk.

Now it's 100% cloud coverage again... It was short but at least the seeing was excellent, there was absolutely no shimmering at all.

Edited by pvaz

Share this post

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Recently Browsing   0 members

    No registered users viewing this page.

  • Create New...

Important Information

By using this site, you agree to our Terms of Use.