#1  
Old 26-09-2007, 07:24 AM
你B
Its only a column of dust

你B is offline
 
Join Date: Aug 2007
Location: New Iceland
Posts: 761
Jupiter 25/9

Well the weather was temporarily clear so I figured "why not, it's my last chace for a week". Took the 10" Dob outside to cool.

After an hour and 30 of cooling with the fan on, I nudged the collimation into place as good as I can get it by shining my red light on the opening of the cheshire.

Telescope: 10" Newtonian
Seeing: 4/10

As I pointed the scope at Jupiter, it immediately became apparent that the seeing was absolutely no good. Well, I didn't expect much in the first place as that jetstream was over us again. Indeed, when I defocused the planet slightly, the shimmering was crazy! Imagine looking directly above a fire. Any low contrast and delicate feature would be washed right away in these conditions.

At 166x I made out 7 belts and the GRS was present this time. It featured a pale pink colour. I could detect some ruffling in the SEB and NEB in moments of good seeing. I caught a shadow transit of Io, and at 9:29 UT the moon itself emerged from a transit at the planet's eastern limb. The EQ band was very obvious, to the point where I could see it varying in thickness. Didn't see much festoon and white oval activity along the southern fringe of te NEB which I put down to either a quiet day on the planet or the poor seeing.

All in all, the view was pretty good considering the bad conditions. Can there possibly be a a night of good seeing before we lose Jupiter for this year?
Attached Thumbnails
Click for full-size image (jupiter 003.jpg)
65.7 KB34 views
Reply With Quote
  #2  
Old 26-09-2007, 10:32 AM
DougAdams
Lord Lissie

DougAdams is offline
 
Join Date: Dec 2004
Posts: 233
Good stuff, love those sketches. Transits are great, especially when you can pick the moon's disk against the planet itself. I've seen that a couple of times, when the moon has just disappeared or about to reappear.
Reply With Quote
  #3  
Old 26-09-2007, 02:59 PM
你B
Its only a column of dust

你B is offline
 
Join Date: Aug 2007
Location: New Iceland
Posts: 761
Thanks Doug one thing that really caught my eye was the EQ band. I've never seen it as well defined as yesterday, even the night before with better seeing and higher mag.

Unfortunately, the poor seeing meant that I couldn't see the moons disk against the planet. I suspect in near-perfect conditions, with magnifications above 200x it would've been possible. (one problem with Jupiter is it doesn't handle anything above 200-250x well).

btw Doug, what telescope did you see it in?
Reply With Quote
  #4  
Old 26-09-2007, 03:10 PM
Dave47tuc's Avatar
Dave47tuc (David)
IIS member 65

Dave47tuc is offline
 
Join Date: Dec 2004
Location: Mornington peninsula. Victoria.
Posts: 1,658
Nice work Sab.

I have been reading your work and as usual very well done

Nice to see the 10" put to better use than when i had it.
Reply With Quote
  #5  
Old 26-09-2007, 03:32 PM
DougAdams
Lord Lissie

DougAdams is offline
 
Join Date: Dec 2004
Posts: 233
Quote:
Originally Posted by 你B View Post
Thanks Doug one thing that really caught my eye was the EQ band. I've never seen it as well defined as yesterday, even the night before with better seeing and higher mag.
Yeah, you've captured what I've seen of that EQ band very well. A pencil thin streak right across the disk (although it bleeds out at each end in my scope).

Quote:
Originally Posted by 你B View Post
Unfortunately, the poor seeing meant that I couldn't see the moons disk against the planet. I suspect in near-perfect conditions, with magnifications above 200x it would've been possible. (one problem with Jupiter is it doesn't handle anything above 200-250x well).

btw Doug, what telescope did you see it in?
8" Celestron Starhopper dob - the old one with the black cardboard/sonotube, now somewhere in the Dandenongs hopefully getting good use.
Reply With Quote
  #6  
Old 27-09-2007, 07:48 AM
你B
Its only a column of dust

你B is offline
 
Join Date: Aug 2007
Location: New Iceland
Posts: 761
ah shouldn't be too hard for me then! Just have to know exactly where the moon is I guess.

But, the forecast is a tragedy. Seriously. My head explode when I saw it.
Saturday night is the only chance, the rest is cold, windy, rainy crap for the next 2 weeks the BOMs prediction of an 80% chance of warmer than normal weather sure as hell isn't coming to fruition in the medium term
Reply With Quote
Reply

Bookmarks

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 04:34 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Advertisement
Celestron Australia
Advertisement
Meade Australia
Advertisement
SkyWatcher Australia
Advertisement
Astromechanics
Advertisement
Lunatico Astronomical
Advertisement
Bintel
Advertisement
OzScopes Authorised Dealer
Advertisement
Astronomy and Electronics Centre
Advertisement