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I Got Frosty Leo

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11 replies to this topic

#1 Asbytec

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Posted 28 February 2020 - 10:17 AM

What an intriguing object in many ways, including it's cool name. I've been wanting to see it for a while. Got it tonight.

 

Despite it's exotic name and object type, it's especially easy to observe. It's plenty bright, the problem is being very small. On the order of 10" arc or so. It is mistakable fro a star at lower sweeping magnification, it took up to about 200x to begin to see it as non stellar. I star hopped to it by starting at 18 Leo then working my way toward the star field that contains NGC 2958. It's a dim galaxy I don't think I can see, but all I needed was the star field. And there it was, one of a few options for some not so dim stars in the area. One of them was it. I guessed right. 

 

Okay, so, you could tell it was non stellar around 200x, but I didn't see much. So, wasting no time, I went up to 300x for a few minutes and decided 400x was they way to go. The view kept getting better and it's two lobes were barely visible along with some extended nebulousness and a faint roundish glow with two brighter lobes embedded in it. So 500x then. Yep, this was pretty good magnification. It's two lobe structure was more easily seen, but not entirely easy. At times I could make out two brighter lobes, the one to the north (NNE) was larger and brighter. It even seemed to have a stellar-like feature embedded within it. It's not the central star, just a small bright condensation, I'm sure. Images kind of show that. The nebula itself seemed to have a faint glow around it and each lobe faded toward the dark of space, to some distance, in the direction of it's bi polar structure. 

 

I tried to really make the sketch look as close to visual as possible, including how small it is (sorry about that). The sketch is pretty close, as it should be, I guess. Go see this enigmatic object, it's easy enough in a modest aperture. All you need is some high magnification and descent seeing. Thanks for looking. 

 

Frosty Leo.png


Edited by Asbytec, 28 February 2020 - 10:18 AM.

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#2 coopman

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Posted 28 February 2020 - 10:31 AM

I've never heard of this one. What is its official name? NGC no., etc.

#3 Asbytec

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Posted 28 February 2020 - 10:37 AM

Okay, sorry about that. It's IRAS 09371+1212, nicknamed the Frosty Leo Nebula. Here is a S&T article with a finder chart. Yea, it's not too well known. It does not have an NGC or IC designation that I am aware of. It might have a star catalog number, though. It was discovered about 20 years ago.

Edited by Asbytec, 28 February 2020 - 10:47 AM.

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#4 Raul Leon

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Posted 28 February 2020 - 11:01 AM

Hi Norme, 

                  I observed this object 7 years ago, and I should've put more power on it, but I guess the seeing didn't allow me to. I used around 300x, definitely going to review it again and add more power if possible. I did notice a brightening on one one side. Thanks for sharing and again , great job!



#5 jeffreym

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Posted 28 February 2020 - 11:04 AM

Based on the S&T chart, it looks like is is at or very near GAIA 613849095450374912.  This PPN does not show up on my charts.

Jeff



#6 Asbytec

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Posted 28 February 2020 - 11:06 AM

Thank you, Raul. I really look forward to you cranking up the power. At 300x is where things started happening, and it only got better at 400x and 500x. Maybe even higher. I thought about hitting it with a narrow band filter, but the exit pupils were getting kind of small. :lol:

Edited by Asbytec, 28 February 2020 - 11:06 AM.


#7 Astrojensen

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Posted 28 February 2020 - 11:12 AM

Frosty Leo is bright enough to be seen in a 60mm refractor and I called attention to this fact quite a few years ago.  

 

 

Clear skies!
Thomas, Denmark



#8 frank5817

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Posted 28 February 2020 - 11:21 AM

Norme,

 

Very nice, a pre-planetary nebula.

Very impressive.

 

Frank :)



#9 Asbytec

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Posted 28 February 2020 - 11:29 AM

Frosty Leo is bright enough to be seen in a 60mm refractor and I called attention to this fact quite a few years ago.


Clear skies!
Thomas, Denmark


Yep, I read your posts, Thomas, doing my research. I think you or Sasa mentioned it was similar to a 11 or 12 magnitude star. Very bright. I don't recall what magnification you called it non stellar, I jumped right to 200x to find it so I skipped lower magnifications.

Thank you, Frank.

I think I have north and south reversed in my sketch.

#10 coopman

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Posted 28 February 2020 - 12:11 PM

It's not even noted on either of the low level star atlases that I have.  I have added it to them now.  I will try for it sometime soon.  Will try for the NGC3020 group too.  Thanks. 


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#11 FRANC LILL

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Posted 28 February 2020 - 12:51 PM

So tiny and so detailed!

Very nice observation, Norme

Thanks,

Francis


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#12 niteskystargazer

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Posted 28 February 2020 - 02:21 PM

Norme,

 

Very fine sketch of Got Frosty Leo smile.gif 

 

CS,KLU,

 

thanx.gif ,

 

Tom


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