Jump to content


Photo

Uranus Observation (November 16, 2010)

  • Please log in to reply
17 replies to this topic

#1 CarlosEH

CarlosEH

    Fly Me to the Moon

  • *****
  • Posts: 7179
  • Joined: 19 Jan 2005
  • Loc: Pembroke Pines, Broward County, Florida

Posted 30 November 2010 - 01:52 AM

I made an observation of Uranus on November 16, 2010 (02:00 U.T.; CM 234.5*, De 9.1*, Ds 11.4*, 5.8m, 3.6") using my 9-inch (23-cm) F/13.5 Maksutov-Cassegrain (310x, S: 6-7/10, and T: 4/6). The preceding and following limbs (circumpolar and temperate latitudes) exhibited a brightening (7/10) whereas the equatorial region appeared dusky (4/10) and irregular. These features were more easily noted when the seeing steadied for moments at a time. The best of luck in your own observations of Uranus.

A digital image produced in Pixelmator.

Carlos

Attached Files



#2 george golitzin

george golitzin

    Surveyor 1

  • *****
  • Posts: 1723
  • Joined: 24 Feb 2006

Posted 30 November 2010 - 04:02 AM

Wow, a very nice observation. I have never seen detail on Uranus. Perhaps not thinking there was any to be seen, I haven't spent a lot of time observing it.

Thanks for the sketch, you've inspired me to take a closer look.

#3 CarlosEH

CarlosEH

    Fly Me to the Moon

  • *****
  • Posts: 7179
  • Joined: 19 Jan 2005
  • Loc: Pembroke Pines, Broward County, Florida

Posted 30 November 2010 - 04:22 AM

George,

Thank you for the compliment on my Uranus observation. Uranus is not an easy object to observe. Faint albedo features (as I have recorded) are visible at times over it's pastel olive-green (or teal) disk. Adequate aperture (typically >6 inches (15 cm); although some observers have detected detail using apertures down to 4 inches (10 cm)), diffraction-limited optics, steady seeing (atmospheric) conditions, and patience on the part of the observer are all required for the detection of albedo features (if any are visible) over this far member of the Solar System. The best of luck in your own observations of Uranus.

Carlos

#4 Jef De Wit

Jef De Wit

    Mercury-Atlas

  • *****
  • Posts: 2734
  • Joined: 06 Mar 2009
  • Loc: Hove, Belgium

Posted 30 November 2010 - 06:19 AM

It must be impressive to see detail on Uranus. Good work Carlos!

#5 Heidescoper

Heidescoper

    Ranger 4

  • -----
  • Posts: 323
  • Joined: 21 Nov 2010
  • Loc: Niedersachsen, Germany

Posted 30 November 2010 - 06:51 AM

Carlos,

great cinema!
So many and different contrasted details - wow! :bow:


CS
Christian

#6 niteskystargazer

niteskystargazer

    Gemini

  • *****
  • Posts: 3061
  • Joined: 05 Oct 2009
  • Loc: 41-43'-28" N 87-42'-39" W

Posted 30 November 2010 - 10:05 AM

Carlos,

Very nice sketch Uranus :waytogo:

CS,KLU,

:thanx:,

Tom

#7 Mentor

Mentor

    Viking 1

  • -----
  • Posts: 629
  • Joined: 30 Sep 2010
  • Loc: Ontario, Canada

Posted 30 November 2010 - 10:47 AM

Beautiful. There is not much else out there that will ask you to use that colour in your sketching.

#8 frank5817

frank5817

    Cosmos

  • *****
  • Posts: 8390
  • Joined: 13 Jun 2006
  • Loc: Illinois

Posted 30 November 2010 - 11:30 AM

Carlos,

A most impressive capture of distant Uranus.
Even at 310x it would take much skill to capture the detail you have recorded.
Wonderful.

Frank :)

#9 proud uncle

proud uncle

    Surveyor 1

  • *****
  • Posts: 1717
  • Joined: 22 Jan 2007
  • Loc: Central Texas

Posted 30 November 2010 - 01:25 PM

Great sketch, Carlos! I agree with others -- more detail than I've ever seen on Uranus. I just had a couple questions.

Did you initially do a rough sketch using pencil, then scanned it and digitally added color and detail?

Are the preceding and following limbs the polar regions, with the darkened band running from top to bottom being the equatorial region?

Thanks again for sharing!

#10 astronz59

astronz59

    Ranger 4

  • -----
  • Posts: 363
  • Joined: 15 Sep 2010
  • Loc: Auckland, New Zealand

Posted 30 November 2010 - 02:25 PM

Outstanding, Carlos! Your observation and artistic abilities never cease to impress! :goodjob:

#11 rolandlinda3

rolandlinda3

    Gemini

  • *****
  • Posts: 3401
  • Joined: 24 Jan 2006
  • Loc: Crozet VA 22932

Posted 30 November 2010 - 03:08 PM

Carlos, excellent observation and sketch.

#12 hbanich

hbanich

    Apollo

  • *****
  • Posts: 1104
  • Joined: 17 Jun 2005
  • Loc: Portland, Oregon

Posted 30 November 2010 - 04:31 PM

Holy smokes - that's more detail than I often see on Mars! Nice sketch as always Carlos, and I suspect your eyesight is a little sharper than most too.

#13 ericj

ericj

    Viking 1

  • -----
  • Posts: 663
  • Joined: 17 Feb 2005

Posted 30 November 2010 - 05:10 PM

Wonderful sketch and report Carlos. You saw a lot of fine detail.

Best,

Eric

#14 CarlosEH

CarlosEH

    Fly Me to the Moon

  • *****
  • Posts: 7179
  • Joined: 19 Jan 2005
  • Loc: Pembroke Pines, Broward County, Florida

Posted 02 December 2010 - 02:18 AM

Thank you all very much for the very kind compliments on my Uranus observation and planetary observing/sketching skills. I was fortunate to have been able to see such detail over this far pastel green member of the solar system.

I made my Uranus observation directly unto a template that I made in my computer. It is acceptable to scan a pencil (graphite) sketch and then add color and detail as noted in the eyepiece.

The bright regions are close to the poles of the planet and the dark band is roughly parallel to the equator. I have provided a modified screen shot of Uranus as produced by WinJUPOS 8.3 ( http://grischa-hahn....jupos/index.htm ). The north pole of Uranus is physically below the orbital plane of the planet (axial tilt of 97.8*). I hope that it helps.

The best of luck in your own observations of Uranus.

Carlos

Attached Files



#15 mike174

mike174

    Viking 1

  • -----
  • Posts: 794
  • Joined: 04 Jan 2005
  • Loc: Central, NJ

Posted 03 December 2010 - 10:43 PM

Carlos,

How long did you observe before you detected those features?

Mike

#16 CarlosEH

CarlosEH

    Fly Me to the Moon

  • *****
  • Posts: 7179
  • Joined: 19 Jan 2005
  • Loc: Pembroke Pines, Broward County, Florida

Posted 04 December 2010 - 03:14 AM

Mike,

I noted the albedo features over Uranus over the initial fifteen to twenty minutes of observing then continued to observe it for another thirty minutes waiting for moments of steady seeing to confirm them. As I pointed out previously, albedo features over Uranus are not always visible. The best of luck in your own observations of Uranus.

Carlos

#17 dweller25

dweller25

    Apollo

  • -----
  • Posts: 1447
  • Joined: 30 Aug 2007
  • Loc: Lancashire, UK

Posted 04 December 2010 - 11:39 AM

Carlos, I had a look at Uranus at opposition in my 5" refractor at x240 - it was tiny, so I know how much skill it takes to see those albedo features, very well done.

#18 CarlosEH

CarlosEH

    Fly Me to the Moon

  • *****
  • Posts: 7179
  • Joined: 19 Jan 2005
  • Loc: Pembroke Pines, Broward County, Florida

Posted 04 December 2010 - 05:35 PM

Dweller,

Thank you for the compliment on my Uranus observation. Your Jupiter observations were excellent showing the SEB Revival (Disturbance). The best of luck in your future observations.

Carlos






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics