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NGC 4051, a spider galaxy?

dob dso EAA NV observing sketching
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#1 FRANC LILL

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Posted 09 April 2020 - 04:16 AM

NGC 4051

 

Located between the hind legs of Ursa Major and the Hunting Dogs, this galaxy is in fact very active if we refer to the intense areas of activity that it contains. It has shown the blasting of 3 supernovae in the past 40 years and hides a super massive black hole of 1.7 million solar masses in its center. Located 45 million light-years away, it belongs to the Big Dipper cluster of galaxies.
Its visual magnitude is 10. At the eyepiece one distinguishes an elongated S shape. After EAA examination, the galaxy shows several very bright zones of high activity in the spiral arms, two of which, located on the eastern edge, suggest a kind of spider hooks.

 

March 22, 2020 live  and EAA observation with SiOnyx Aurora night cam. Setup is a 16" dobsonian scope placed on an equatorial table, afocal mount of the cam behind a Celestron 25mm eyepiece, very good conditions of seeing and transparency. Drawing on black Canson paper with chalk and wax pastel pencils.

 

Clear sky,
Francis

 

 

 

200322-NGC4051.jpg

 

 

Atrax_robustus.jpg

 


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#2 GUS.K

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Posted 09 April 2020 - 05:01 AM

Great sketch and great looking galaxy, thanks for sharing Francis.



#3 DDEV

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Posted 09 April 2020 - 05:03 AM

Hi Francis,

Your sketch of NGC 4051 is very nice indeed, and the details you provide about this area of Ursa Major highlight the value of spending time in and around the constellation.

Many thanks.

Clear skies,

Darren.
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#4 havasman

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Posted 09 April 2020 - 05:04 AM

In the same way a full moon is known as a Pink Moon or other such silliness? No, thank you. NGC4051 is a type SABb(B) galaxy with an S-type agn (HyperLeda) and does not require anthropomorphism to be defined.


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#5 Migwan

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Posted 09 April 2020 - 06:07 AM

Analogy is a fine (and quick) way to describe an object.    Not at all anthropomorphic in this case.  Well done.

 

jd 


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#6 Raul Leon

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Posted 09 April 2020 - 06:27 AM

Fine sketch Francis, some folks don’t like monikers and prefer scientific analogies.,I find nothing wrong with finding that an object resembles something else, and calling it that.
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#7 rodelaet

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Posted 09 April 2020 - 08:40 AM

A very fine sketch, Francis! bow.gif

As for monikers, many deep-sky objects have nicknames. And many of these nicknames motivated me to observe those objects. It triggers the imagination of the sketcher. It reminds me of my sketch of M24 with binoculars. I can't help but to see the Nautilus of Jules Verne. lol.gif


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#8 sunnyday

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Posted 09 April 2020 - 08:47 AM

really, wow. what a beautiful sketch, well done and thank you.


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#9 niteskystargazer

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Posted 09 April 2020 - 08:47 AM

Francis,

 

Very fine sketch of NGC 4051, (A  Spider Galaxy?) smile.gif .

 

CS,KLU,

 

thanx.gif ,

 

Tom


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#10 frank5817

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Posted 09 April 2020 - 12:05 PM

Francis,

 

A wonderful galaxy sketch.

 

Frank :)



#11 FRANC LILL

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Posted 10 April 2020 - 02:51 AM

Thanks a lot to all of you for your kind words and likes!

 

In the same way a full moon is known as a Pink Moon or other such silliness? No, thank you. NGC4051 is a type SABb(B) galaxy with an S-type agn (HyperLeda) and does not require anthropomorphism to be defined.

Hi, havasman,

 

Sorry, I like to provoke, it gets always a result. The proof, it caught your attention! Sorry if I have hurt you.
Just a precision. I am a contemplative guy. I have neither the memory of numbers nor that of abbreviations. To find my way around in my head, I like nicknames!
Another thing: I like science when it is alive, with true information as well as a bit of humour.

But you are completely right, a galaxy does not require anthropomorphism to be defined.
 

 

Kind regards,

Francis


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#12 cloudbuster

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Posted 10 April 2020 - 03:43 AM

That is a fine looking SABb(B) with S-type agn (HyperLeda) smile.png

Seriously, well done.

 

Regards, Martijn


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#13 Richoff

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Posted 10 April 2020 - 07:05 AM

Many people, so much smarter than myself... thanks to those using bigger/complex (to me) words... my knowledge of the English language is expanding. :)

Cheers.


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#14 Sergey Stern

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Posted 10 April 2020 - 07:13 PM

Those galaxy arms really looks like spider legs! 

Great sketch!

 

Sergey



#15 bertandlaville

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Posted 11 April 2020 - 07:58 AM

Without SiOnyx Aurora, the spider has gone out far away !

Bertrand

http://www.deepsky-d...4051/dsdlang/fr

 

 

 

 

 

 

Attached Thumbnails

  • NGC 4051  T635  BL 2014 05 28.jpg

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#16 niteskystargazer

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Posted 11 April 2020 - 10:52 AM

Bertrand,

 

Fine sketch of NGC 4051 smile.gif .

 

CS,KLU,

 

thanx.gif ,

 

Tom



#17 Tyson M

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Posted 11 April 2020 - 09:12 PM

Nice sketch!  Interesting galaxy target for sure.




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