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NGC 2818

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#1 Asbytec

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Posted 02 March 2020 - 11:06 AM

This is probably the last descent night for DSO until after the full moon. Tonight the 1st quarter moon was low in the west as NGC 2818 passed through the meridian at about 38 degrees above the horizon. I set up an hour early so my scope could cool. It's an easy star hop to NGC 2818, I found it right away at 67x. Though it's pretty bright, it did not stand out all that well. Not the best conditions, but a clear night and the Orion Ultrablock made it pop. So that was cool. 

 

Okay, so at 200x (1mm exit pupil with a UHC filter), and the thing was readily visible. Always visible, actually. So, I settled in for a long observation. The first thing to notice it is definitely elongated pretty much east to west. After a while, I could begin to make out it's bi polar structure. The rift running through it was pretty obvious and wide. What was also obvious is the southern lobe was slightly larger and brighter than the more stubby northern lobe. The lobes were surrounded by a fading glow with a darker rift running between them. 

 

What's interesting is, there were some very distinct, but hard to place stellerings in the nebula. I think about 2 or 3 in the southern half, and another 1 or maybe 2 in the northern half. I think they are just fleeting glimpses of the brighter part of the nebula near the center. Very difficult to place accurately and count them, I may have counted one or two of them more than once because I almost never saw more than one at a time. They just appear and disappear just as fast. I know I saw them many times, though, so I'm confident they are there. I only added one bright speck in each lobe, just not sure how many there were. I hope they show well on your monitor. (Edit: I could not see them when I posted the pic, so I brightened them a tiny bit). 

 

Now, I am not much of a open cluster sketcher, so I placed only the prominent field stars I paid attention to. I took out the Ultrablock for a while and did a sketch only of the brighter members. Those I could see, pretty much, with the filter anyway, but I wanted to get a feel for the rest of the cluster. Those other faint cluster stars are tossed in at random trying giving a feel for the cluster. NGC 2818 is on the western edge of a fairly loose cluster. 

 

Okay, so after about an hour of my dog guarding me and barking occasionally, and after soaking my black hood in my coffee cup, I pretty much figured this was all I was going to see. But, it was enough. It's an interesting object. I might hit it again after full moon when the sky is darker. The sky wasn't terribly bright in the south, so it was okay. But, it can be a little better. This is a bright nebula and I am sure it will show a little better. Not bad tonight, though. 

 

NGC 2818.png


Edited by Asbytec, 02 March 2020 - 11:10 AM.

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#2 niteskystargazer

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Posted 02 March 2020 - 03:22 PM

Norme,

 

Nice sketch of NGC 2818 smile.gif .

 

CS,KLU,

 

thanx.gif ,

 

Tom



#3 sunnyday

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Posted 02 March 2020 - 04:28 PM

very nice work 



#4 frank5817

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Posted 02 March 2020 - 06:11 PM

 Norme,

 

This is a fine looking planetary nebula in your sketch with that dark bisector. I looked at images of this one and your capture is spot on.

Well done.

 

Frank :)



#5 Asbytec

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Posted 02 March 2020 - 08:12 PM

Thanks for the replies. 

 

Frank, depends on what images. lol.gif

 

Many of them are highly resolved and in color. I actually found one lesser image, my favorite because they are closer to the visual view. It's pretty much spot on visually except inverted. I think I got the PA of the bisector a little off, but that's on me not following it accurately to a field star. Still, I guess we can work with the better images to interpret what we saw, just need to dumb them down quite a bit and look at then in a very general sense. I usually check sketches of others, too. Cindy got some interesting detail, many other sketches are very similar. Here's an interesting one in a 17" I just found showing some brighter condensations in each lobe. And another sketch. What's interesting is how many of them seem to be in the same ballpark, but each a little different in their own way. 


Edited by Asbytec, 02 March 2020 - 08:13 PM.


#6 Raul Leon

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Posted 02 March 2020 - 08:56 PM

Norme,  This is one of those "objects that doesn't get too high in my sky". Ive never been able to get a real good view of this planetary, but it looks like you certainly did. 


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#7 Asbytec

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Posted 02 March 2020 - 11:46 PM

Raul, yea, i't reasonably high here. Right about 40 degrees above the horizon and still affected, but not so low as to be completely washed out. It does help quite a bit. Thanks. 



#8 cloudbuster

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Posted 03 March 2020 - 04:15 AM

Had to look this one up and found that I did see it too from La Palma. But even there it remains quite low in the sky and I only mentioned that the PN showed "some structure" smile.png .

Seeing your sketch, it's definitely worth a revisit. Nice work again Norme, you have been very busy in the past month.

 

Regards, Martijn



#9 Asbytec

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Posted 03 March 2020 - 10:20 AM

Martijn, we've had a slow start to our dry season, usually starting in November. So yes, been taking advantage of every clear night.

I do check your website for your impressions. You have a nice scope and access to nice skies and one of the better sketching sites.

I realize, though, I sketched the divide much to dark Vs realistic. I was easy to see, just not as prominent as I show it. I want to update the sketch when I have time.


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