Jupiter and Uranus 15th Oct
#1
Posted 16 October 2011 - 02:04 PM
Last night I observed Jupiter and Uranus under good seeing conditions (for once).
Uranus was lovely, I got a little mesmerised by it in fact and transferred my attention to Jupiter a bit late for the CM transit of the GRS.
Uranus: It took about half an hour to confirm these details, slewing to a nearby star of similar magnitude to check focus a couple of times; I saw a darker following hemisphere, a brighter EZ which appeared curved, and a brighter proceeding polar region.all pretty tricky stuff to be sure of but I took care to be certain it was not made up.
Jupiter was lovely and even appeared like a crisply processed webcam shot for a fleeting second, too fleeting to take in sadly.
The southern tropical area was well seen with a few belts and zones, and happily three small white ovals glimpsed in the best moments.
The rift in the SEB is twisted around the GRS nicely and appeared really quite wide.
I noted a normal dark barge in the NEB and also a paler orange one just rising onto the disc.
The northern tropical region was very pale and bland, more so than of late I think.
#3
Posted 16 October 2011 - 04:37 PM
Outstanding observations of both Jupiter and Uranus. The detail over Jupiter is very nicely recorded (much activity over the GRS region and NEB). Interesting Equatorial Zone (EZ) festoons. The detail noted over Uranus is very impressive. The alternating dark and light banding over the disk of Uranus is what has been recently described. Thank you for sharing them with us all.
Carlos
#4
Posted 16 October 2011 - 05:13 PM
Both of these sketches look wonderful. Your attention to detail is outstanding and the colors are a big plus too.
Frank
#5
Posted 16 October 2011 - 06:01 PM
#6
Posted 17 October 2011 - 03:40 AM
#7
Posted 17 October 2011 - 06:04 AM
#9
Posted 17 October 2011 - 07:06 AM
Stanislas-Jean. Our observations are extremely similar, almost identical in fact! The sky was very transparent and the seeing was very good. Still these features were far from being obvious or easy, the curve of the EZ was the very last detail I became aware of. The zone was there on and off throughout the session but it only started to appear to have a slight curve after 40 minutes of observation!
#10
Posted 17 October 2011 - 09:48 AM
The sky transparency is one of the main factor for collecting something consistent.
I did something also last evening but not still scanned for an issue. Will do earliest.
Stanislas Jean.
#11
Posted 17 October 2011 - 10:45 AM
Very good sketches of Uranus & Jupiter .
CS,KLU,
,
Tom
#12
Posted 17 October 2011 - 10:50 AM
Jean
#14
Posted 17 October 2011 - 12:56 PM
#15
Posted 17 October 2011 - 02:36 PM
Stanislas-Jean
That is really very impressive for a 150mm Cassegrain!
I have tried an ETX125 on Uranus in the past and seen no detail at all (although altitude is much better these days so this must help too), very good observation.
#16
Posted 17 October 2011 - 10:55 PM
Pete
#17
Posted 18 October 2011 - 12:13 AM
John
#18
Posted 19 October 2011 - 07:20 AM
#19
Posted 19 October 2011 - 07:35 AM
#20
Posted 19 October 2011 - 12:53 PM
I have also observed Uranus with unclear results in the past, but this past couple of years I have started being able to resolve the vague variations into actual features. I think it can be explained by a couple of factors.
1, Uranus is at last visible at a good altitude in the UK sky.
2, Uranus is roughly edge on presently and therefore the EZ is well displayed, this being perhaps the least difficult feature to detect.
3, I have heard that the intensity of the variations can change with time too.
I'm no expert but it makes sense to me!
#21
Posted 19 October 2011 - 06:17 PM
#22
Posted 24 October 2011 - 05:59 AM
...suspected variations in albedo over the disk but could never be sure if I was observing actual surface features or an effect of the seeing.
I agree, same experience, Hell's Kitchen.
#23
Posted 04 November 2011 - 12:19 PM
nice detail and colour!