Mammoth Saturn Session!
Posted 08 March 2011 - 07:01 PM
I had a very good Saturn session last night! I managed to get three drawings, all of which shows the two bright spots in the north. The last drawing was made with a 80A filter and shows the spots a little better.
Posted 09 March 2011 - 05:24 AM
Posted 09 March 2011 - 05:48 AM
Beautiful and very accurate observations of the ringed planet. You have recorded the NTrZ spots very nicely as these represent the remnants of the Dragon Storm. The spots appear enhanced while using a light blue (Wratten 80A) filter which implies a higher altitude in the Saturnian atmosphere. Thank you for sharing them with us all.
Posted 09 March 2011 - 08:01 AM
These are some of the nicest Saturn drawings I have seen you produce, I like them very much.
how 'obvious' were those spots visually?
I have not observed Saturn for some months now and when I last looked the storm seemed to be pretty uniformly white to me. I know you did not manage to observe it back in mid-winter when it was new, but do you think it is more lumpy looking now?
Posted 09 March 2011 - 03:27 PM
The observation was made with only average seeing, and although they were there, I would have to say they were not striking (to me). This may well be due to the seeing however. I agree they were white in colour, but there was a metallic greenish hue present in the NTropZ and the NTZ.
Structure wise, it was hard to be certain but they looked irregular to me, and were surrounded by a ring of darker material that seemed to come from the NEB. Actually Chris, as we're both visual observers, i suggest we compare observations through the apparition!
They were certainly enhanced by the Wratten #80A filter! This suggests to me (as Carlos has said) that they are an upper atmosphere phenomena.
Posted 09 March 2011 - 06:01 PM
I was going to observe saturn on Monday night but I left my telescope out for several hours after observing Jupiter, and it totally frosted up, even the primary mirror. I couldn't be bothered battling with it so I went to bed!
Hopefully the storm will remain for long enough for us to make some comparisons, that would be useful and enjoyable.
Posted 09 March 2011 - 08:41 PM
A very fine series of sketches showing all the interesting activities in the upper atmosphere of Saturn.
Thanks for sharing.
Posted 10 March 2011 - 01:34 PM
Observing time was about 11/1700UT. I can't do the ephemeris in my head, but curious to know if it was the same part of the storm you sketched. As a wag, the ephemeris sounds about right to have placed that part of the storm within view.
Posted 10 March 2011 - 09:51 PM
A fine set of observational sketches--very well done! The best view I got of the NTrZ storm was also with the W80A filter.
Posted 11 March 2011 - 12:15 AM