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Planetary Nebula: The Ghost of Jupiter.

astrophotography dob dso EAA NV sketching
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#1 FRANC LILL

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Posted 26 March 2020 - 03:56 PM

Planetary Nebula: The Ghost of Jupiter.

 

 

By direct vision at the eyepiece, I had never seen anything other than a blurry oval and turquoise green bubble. This time in EAA vision, I use the SiOnyx Aurora cam as eyepiece and I decided for once to set it up in color mode. I usually work in BW mode on galaxies and other large PN's, the colors having a very unpleasant rendering. In addition, this nebula has enough light to support a magnification, and I pass the 9mm Nagler eyepiece.

 

It was a revelation: a pretty turquoise green bubble is there. Then, what was not my surprise to see then appear, fleetingly in the turbulence holes, all the details of its structure, the central star, and several shells of different shape.

 

In addition to the drawing I attach the picture: a single capture of 1.5 sec with SiOnyx Aurora in color mode, afocal seting behind a 9mm Nagler eyepiece on a 16" dobsonian placed on an equatorial table. Very good conditions of seeing and transparency. SQM 20.7 measured with Dark Sky Meter for IPhone. Drawing on black Canson paper with chalk pastels and digital redrawing of the stars.

 

 

200324-NGC3242-Gju.jpg

 

 

 

XQE_0078-brute.jpg

 

 

Clear sky,

Francis


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#2 Tyson M

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Posted 26 March 2020 - 04:43 PM

bow.gif Very nice!!!  



#3 hokkaido53

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Posted 26 March 2020 - 05:00 PM

Nice work, Franc! I never realized NGC 3242 contained that kind of detail. It looks a little like NGC 6543 "Cats-Eye" nebula in Draco.

Roy in New Mexico



#4 eyeoftexas

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Posted 26 March 2020 - 05:05 PM

Excellent sketching.  Thanks for sharing.



#5 jim kuhns

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Posted 26 March 2020 - 05:50 PM

A very detail planetary  object.  My first view was through a 25"  f/5 obsession. Almost knocked me off

the ladder.



#6 sunnyday

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Posted 26 March 2020 - 06:00 PM

absolutely superb, great talent
thank you.



#7 Raul Leon

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Posted 26 March 2020 - 08:13 PM

Nice work and narrative!



#8 frank5817

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Posted 26 March 2020 - 08:31 PM

Francis,

 

This is a good looking sketch of the Ghost of Jupiter. In many ways it looks better in detail than the photo which is colorful but overexposed.

Nice Post

 

Frank ;)


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#9 FRANC LILL

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Posted 27 March 2020 - 03:30 AM

Thank's a lot to all of you for stopping by, Tyson, Roy, eyeoftexas, jim, aurora, Raul, Frank, and also for all the likers, AdirondackAstro, starfire5, descott12, dtmracer, Achernar, happylimpet, Ibim, jeremiah2229.

That really encourages my in my technique.

 

Kind regards,

Francis


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#10 Asbytec

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Posted 27 March 2020 - 04:20 AM

Frank, this was one of my first sketches. Your image is much better resolved in terms of the central star and annular appearance. I was able to see the ring structure, of course, but the brighter areas at the ansae were small bright points rather than extended areas. Nice job. 


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#11 Ivan Maly

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Posted 27 March 2020 - 09:53 AM

This is a great observation, Franc. Do you view it on an external monitor like a phone, or through the electronic viewfinder of the camera? If the latter, would you say it can be used at such a low brightness that it would preserve your night vision at least to some extent, like not feeling blinded when looking away from it?


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#12 jim kuhns

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Posted 27 March 2020 - 10:59 AM

I have heard this called the "CBS" logo.
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#13 niteskystargazer

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Posted 27 March 2020 - 11:05 AM

Francis,

 

Nice sketches of Planetary Nebula: The Ghost of Jupiter. smile.gif .

 

CS,KLU,

 

thanx.gif ,

 

Tom


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#14 AdirondackAstro

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Posted 27 March 2020 - 12:10 PM

Had this in my sights the other day, but nowhere near as detailed. Fabulous sketch!

Sent from my SM-N970U using Tapatalk
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#15 FRANC LILL

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Posted 27 March 2020 - 12:34 PM

Thank you for your visit, Norme, Ivan, Jim, Tom, Mike.

 

 

This is a great observation, Franc. Do you view it on an external monitor like a phone, or through the electronic viewfinder of the camera? If the latter, would you say it can be used at such a low brightness that it would preserve your night vision at least to some extent, like not feeling blinded when looking away from it?

During field work, I favor observation through the electronic viewfinder of the camera. I don't want to lose too much night vision, so I set the brightness at lowest, and watch in the view finder with one eye and I preserve the other one for night vision.


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#16 astronz59

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Posted 27 March 2020 - 04:45 PM

Meticulous work and great technical detail resulting in an inspiring sketch Francis! bow.gif waytogo.gif  


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