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Aquila's Bubble: NGC 6781

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#1 Roel

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Posted 27 July 2014 - 02:33 PM

A few nights ago astronomical darkness returned to the Netherlands, and so the season 2014/2015 finally got its kick-off. It was a nice clear and warm summer night, and after work I drove directly to my favourite observing site near Lochem, The Netherlands.

One of the highlights that evening was the weird and wonderful planetary nebula NGC 6781 in Aquila. In my 350mm f/4 truss Dob it looks like a uniform, disk shaped glow amidst the stars at first, but at 175x the outer ring quickly becomes very apparent. Strangely the southeast side of the nebula is pretty bright, while the opposite side nearly fades into the background. It kind of resembles the shape of a thin crescent moon with earthshine. Absolutely beautiful!

I made a sketch with graphite pencil on white paper, later inverted with Photoshop. Besides being inverted, it is the original drawing as made behind the eyepiece.

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#2 Andrev

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Posted 27 July 2014 - 04:05 PM

Really impressive sketch. Beautiful DSO.

Congratulation Roel.

Andre.

#3 IVM

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Posted 27 July 2014 - 05:44 PM

Nice view. Coincidentally I was just preparing to re-observe this object.

#4 frank5817

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Posted 27 July 2014 - 10:37 PM

Roel,

The second I saw your sketch, I thought the view looked like a thin, blue, cresent Moon with earth shine. I see it about the same way except not blue but pale gray.
Wonderful capture.

Frank :)

#5 Roel

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Posted 28 July 2014 - 03:17 AM

Frank,

The blueish color is mostly a result of the (somewhat) yellowisch white balance of the photograph. when inverted it turns a bit blue. I decided to keep that color, because it looks a bit like the actual view through the Ultrablock filter.

#6 Special Ed

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Posted 28 July 2014 - 06:00 AM

Really nice, Roel! I have never seen this one before. It actually does look like a bubble--well done.

#7 Illinois

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Posted 28 July 2014 - 06:53 AM

Nice! Good job on photoshop! :waytogo:

#8 niteskystargazer

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Posted 28 July 2014 - 02:59 PM

Roel,

Nice sketch of Aquila's Bubble (NGC 6781) :).

CS,KLU,

:thanx:,

Tom

#9 Illinois

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Posted 29 July 2014 - 06:49 AM

Question is what kind and what brand name of Photoshop? Thanks!

#10 PeterDob

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Posted 29 July 2014 - 09:13 AM

Very nicely done, Roel! Actually, this is one of my favourite planetaries and I'm seriously impressed by how you paid homage to it. Very subtle... seducing... I love it!

Peter

#11 paulsky

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Posted 29 July 2014 - 11:17 AM

Hi there,
What I like most is the delicacy of your drawing!
Paul

#12 Heidescoper

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Posted 30 July 2014 - 12:10 AM

hi Roel,

very nice sketch,
good observation.

Bye
Christian

#13 Roragi

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Posted 30 July 2014 - 04:16 AM

Roel nice sketch, is a very nice planetary crescent, good job.

Regards.
Roberto.

#14 dragonstar4565

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Posted 07 August 2014 - 12:56 PM

That is a really impressive sketch of, this nice planetary in Aquila... :D



#15 mdowns

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Posted 07 August 2014 - 02:08 PM

Stellar! Really nice rendition.



#16 cildarith

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Posted 07 August 2014 - 02:49 PM

Excellent sketch Roel!



#17 Scanning4Comets

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Posted 10 August 2014 - 12:23 AM

Great sketch!

 

One of my fave PN's

 

Cheers! :D








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