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Uranus and Jupiter drawing!

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#1 Paul G. Abel

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Posted 01 September 2010 - 07:28 AM

Greetings all!

Here is an observation I made of distant Uranus:
Posted Image
The disk size is small, but at 312x and 400x, in average or better seeing some features (like the brighter EZ) are discernible!

Here is a Jupiter drawing I made on 31st August 2010
Posted Image

All best wishes!
-Paul

#2 niteskystargazer

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Posted 01 September 2010 - 07:53 AM

Paul,

:waytogo:, on your nice sketches :).

:thanx:,

Tom

#3 lunar

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Posted 01 September 2010 - 12:08 PM

You sure captured a lot of detail in all of them. I'm surprised, I didn't know it was possible to pick up that much detail in a magnification around 100X. Good Job!

#4 Jef De Wit

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Posted 01 September 2010 - 12:17 PM

Two impressive observations! I don't think there are to many people who saw detail on Uranus...

#5 mikesemmler

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Posted 01 September 2010 - 12:29 PM

very good job, Paul and Jef - you are all right about details of uranus.

Michael

#6 FJA

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Posted 01 September 2010 - 12:33 PM

That Uranus drawing is impressive, Paul, so much detail.

#7 Paul G. Abel

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Posted 01 September 2010 - 12:40 PM

Thanks all!

In fact David Gray has recorded more detail on Uranus than me, although is his telescope is larger than mine. I think he even got a satellite transit once!!!!

#8 CarlosEH

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Posted 01 September 2010 - 01:18 PM

Paul,

Outstanding observations of Jupiter and Uranus. You have detected impressive detail over both planets.

The Great Red Spot (GRS) and Oval BA are prominent in your Jupiter observation. An interesting dark section over the South South Temperate Zone (SSTZ). The North Equatorial Belt (NEB) appears very active (bright rifts and dark condensations). The blue festoons along the southern border of the NEB (NEB-S) appear to be flowing in your fine rendering. Many observers do not realize that, although a magnification of 200-300x is normally employed on Jupiter, a lower magnification as used for your observation (111x) is usually more than adequate to detect the majority of albedo features visible over the atmosphere of Jupiter. Next time you are observing Jupiter use a magnification between 200-250x and study the disk then lower the magnification to 100-120x and you will be surprised to note the same albedo features detected at the higher magnification.

Your Uranus observation is outstanding. Albedo features may be detected over time if using adequate aperture (>6 inches (>15 cm); although experienced observers have detected them using 4 inches (10 cm)) and a steady atmosphere (seeing). Your observation reminds me of the classic Uranus observations of Steavenson and Antoniadi, among other observers of the past. The two mentioned astronomers also recorded a bright equatorial zone surrounded by dark belts. I have attached a an image of Uranus based upon a 1915 (September) observation of Uranus by W. H. Steavenson showing the bright equatorial zone and the parallel dark belts as you have rendered. Your fine observation of Uranus made using the famous 24-inch (60-cm) Lowell Refractor on September 12, 2009 ( http://www.britastro...urn/uraobs.html ) appears similar to the current one. David Gray (BAA) is an outstanding artist/observer who is well known for his beautiful observations of Saturn (and all other planets). David has two excellent observations of Uranus posted on the BAA Saturn Section web site ( http://www.britastro.org/saturn/ and http://www.britastro...urn/uraobs.html ) as well.

Thank you for sharing these excellent observations with us all. I look forward to your future observations.

Carlos

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#9 joelimite

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Posted 01 September 2010 - 03:35 PM

Terrific sketches, Paul!

#10 frank5817

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Posted 01 September 2010 - 05:30 PM

Paul,

This is the work of a dedicated perfectionist.
It reminds me of the excellent sketches of the late Paul Doherty. Beautiful captures.

Frank :)

#11 Paul G. Abel

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Posted 01 September 2010 - 05:50 PM

Thanks everyone for the kind remarks, they are very much appreciated- especially Carlos who always goes to post comments which are well considered and nothing but helpful and encouraging.

Frank: I'm delighted you see some similarity with Paul Doherty's work. I was taught the art of lunar and planetary astronomy by Patrick Moore then went on to use similar visual and artistic methods to Paul, his and Patrick's drawings being a benchmark for me. Later I added some of my own techniques to develop what I think now is my style, but reminiscent of these other great observers!

All best wishes,
-Paul.

#12 Tommy5

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Posted 01 September 2010 - 06:51 PM

great sketches very accurate and detailed thanks for posting.

#13 JimPie

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Posted 02 September 2010 - 01:42 AM

Paul,
Excellent sketches and observations.The detail in both are outstanding.

#14 Dee

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Posted 02 September 2010 - 08:16 AM

Excellent sketches, the detail on Uranus is really cool, I admire that .

Dee

#15 Sarkikos

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Posted 05 October 2010 - 11:46 AM

Paul,

Excellent drawings and observations. I've never even attempted to distinguish surface details on Uranus before, but now I might give it a try!

Mike

#16 Sarkikos

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Posted 05 October 2010 - 11:48 AM

Carlos,

Many observers do not realize that, although a magnification of 200-300x is normally employed on Jupiter, a lower magnification as used for your observation (111x) is usually more than adequate to detect the majority of albedo features visible over the atmosphere of Jupiter. Next time you are observing Jupiter use a magnification between 200-250x and study the disk then lower the magnification to 100-120x and you will be surprised to note the same albedo features detected at the higher magnification.


I agree. This matches my experience completely.

Mike






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