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Planetary Nebula NGC 6210

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#1 Anthony236J

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Posted 08 July 2018 - 10:53 AM

Last Friday, I tracked down planetary nebula NGC 6210. At 22x, this nebula appeared as a point source, similar in magnitude to nearby star HD 151202.  Increasing magnification to 117x, at first did not present a clearly non-stellar object with averted vision. Though, I found that using direct vision on similarly bright star HD 151202 would display a very faint point source, but using direct vision on the nebula made it disappear. I assume this is because it is actually an extended light source.  I'm sure this has been mentioned here already, but it is a technique that I'll continue to use.  After some time at the eyepiece, I could start to discern a non-stellar representation.

 

NGC6210 2018 07 06 Borg55FL

 


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#2 frank5817

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Posted 08 July 2018 - 03:23 PM

Anthony,

 

This is nice sketching; any color visible (green, blue)?

 

Frank :)



#3 TieDyeAstronomer

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Posted 08 July 2018 - 03:24 PM

Nice sketch, Anthony! Can you give details about the conditions/scope? (EDIT: Nevermind, I see you gave this in the sketch :) )

 

I'll hopefully be able to sketch this one soon myself. It's my astronomy club's "object of the month" this month. I've already looked at it once with my 8" in my city backyard- at much higher powers, 255x and 400x, on a night of excellent seeing. It was clearly nonstellar, but man, it was tiny. I could sort of see how it gets the name "Turtle Nebula", with a little egg shaped "shell" and fainter "corners" like stubby turtle legs. According to my log the impression was not very striking, though!

 

Interesting observation with the direct vision nebula vs. star approach. I'll keep that in mind when I'm observing.

 

Clear Skies!

Lauren Herrington


Edited by TieDyeAstronomer, 08 July 2018 - 03:25 PM.


#4 Special Ed

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Posted 08 July 2018 - 03:39 PM

Nice work, Anthony.  I almost had to use averted vision to see it on your sketch.



#5 Anthony236J

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Posted 08 July 2018 - 04:38 PM

Thanks all!

 

Frank - no I could not see any colour. I've never seen colour in a DSO though.

 

Lauren - I did not record the NELM unfortunately, but it seemed the usual conditions for my city skies (white/red zone border). Nice observation, looking forward to your sketch of the same object! 117x is the most magnification I can obtain with this refractor, but I wonder if there would be enough light for such a small exit pupil to detect this shell.

 

Michael - sorry if the rendition is too faint and fuzzy! I think it is easier to spot in real life than the drawing leads on


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#6 Special Ed

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Posted 08 July 2018 - 07:52 PM

Anthony,

 

I meant it as a compliment.  smile.gif


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#7 niteskystargazer

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Posted 10 July 2018 - 04:42 PM

Anthony,

 

Nice sketch of  Planetary Nebula NGC 6210 smile.gif .

 

CS,KLU,

 

thanx.gif ,

 

Tom


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#8 iainp

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Posted 12 July 2018 - 11:58 PM

Glad to see you are adding to your PN collection Anthony :-) I had to get up to 600x to see the "stubby turtle legs"!

Posted here: https://www.cloudyni...gc-6210-at-600x

Iain 


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#9 Anthony236J

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Posted 13 July 2018 - 09:27 AM

I remember that sketch of yours, very close to what the image shows. Impressive!  I'll be keeping an eye out for future sketches by you (and others) here on these bright nebulae.  Their small size gives me a good chance to observe (well, detect) them from my city skies.



#10 iainp

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Posted 13 July 2018 - 12:26 PM

Good luck with more PNs! Yes, as you can tell, I love them too, mainly because they are not so sensitive to light pollution as galaxies and other extended faint objects and can often take high magnifications to reveal lots of detail. 

Iain 


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