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Jupiter and Uranus 15th Oct

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#1 chrisrnuttall

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Posted 16 October 2011 - 02:04 PM

Two for the price of one today.

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.

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  • 4864334-uranus 20111015CN.jpg


#2 chrisrnuttall

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Posted 16 October 2011 - 02:05 PM

jupiter drawing

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  • 4864337-jupiter 20111015CN.jpg


#3 CarlosEH

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Posted 16 October 2011 - 04:37 PM

Chris,

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 frank5817

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Posted 16 October 2011 - 05:13 PM

Chris,

Both of these sketches look wonderful. Your attention to detail is outstanding and the colors are a big plus too.

Frank :)

#5 astronz59

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Posted 16 October 2011 - 06:01 PM

Lovelly work, Chris. What medium do you use for the colouring? :bow: :bow: :bow:

#6 Jef De Wit

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Posted 17 October 2011 - 03:40 AM

WOW! Impressive work!

#7 Sol Robbins

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Posted 17 October 2011 - 06:04 AM

Excellent!

#8 stanislas-jean

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Posted 17 October 2011 - 06:25 AM

Superbe sketches.
Personnally I did this on Uranus, day before.
The planet is oriented left right in comparison to yours.
I presume the sky transparency was excellent, difficult to catch a curvature of the EZStanislas-Jean

Attached Thumbnails

  • 4865440-Uranus_14.10.11_20H30UT.jpg


#9 chrisrnuttall

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Posted 17 October 2011 - 07:06 AM

Astronz59. I use pastel pencils ov velour paper.

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 stanislas-jean

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Posted 17 October 2011 - 09:48 AM

Agree. EZ is obvious and the albedo hemisphere variations harder to collect.
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 niteskystargazer

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Posted 17 October 2011 - 10:45 AM

Chris,

Very good sketches of Uranus & Jupiter :).

CS,KLU,

:thanx:,

Tom

#12 JeanB

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Posted 17 October 2011 - 10:50 AM

Wonderful work indeed!

Jean

#13 stanislas-jean

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Posted 17 October 2011 - 12:06 PM

This is what I did yestergay evening with the cassegrain of 150mm.
Stanislas-Jean

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  • 4865942-Uranus 16.10.11 19H40UT.jpg


#14 dweller25

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Posted 17 October 2011 - 12:56 PM

Two superb drawings Chris, you made the best of the break in the poor weather.

#15 chrisrnuttall

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Posted 17 October 2011 - 02:36 PM

Thanks David, the weather is awful again tonight, I just walked the dog in it, pitch black, wind trying to remove my coat and horizontal rain in my eyes!

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 azure1961p

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Posted 17 October 2011 - 10:55 PM

I'm beside myself Chris. Arguably the best Uranus drawing I've ever seen. The color is nailed perfectly. Jupiter is beyond terrific. You've really set the bar Chris. Stunning work.

Pete

#17 geminijk

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Posted 18 October 2011 - 12:13 AM

Gorgeous sketches!

John

#18 HellsKitchen

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Posted 19 October 2011 - 07:20 AM

Very nice sketches. Impressed you could see detail like that in Uranus. I've had the planet at inexcess of 400x in good seeing and 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.

#19 FJA

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Posted 19 October 2011 - 07:35 AM

Lovely sketches, Chris. I particularly like your Jupiter sketch but, like the others, I am impressed by the detail you've captured in the Uranus sketch.

#20 chrisrnuttall

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Posted 19 October 2011 - 12:53 PM

HellsKitchen

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 Tommy5

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Posted 19 October 2011 - 06:17 PM

Great planetary sketches a lot of good detail there congrads.

#22 Asbytec

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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 Michael11

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Posted 04 November 2011 - 12:19 PM

I liked the jupiter a lot,
nice detail and colour!


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