11 replies to this topic

[PhilH]

What is your favorite globular cluster? Apart from those two southern hemisphere beauties, Omega (ω) Centauri and 47 Tucanae, my answer has to be M22 in Sagittarius. Admittedly, the star chains and "propeller" formation within M13 in Hercules (profiled in the July 2017 Cosmic Challenge) are visually intriguing. But there is just something about the remarkable richness of M22 and its surrounding star field that calls to me.

Click here to view the article

[Jon Isaacs]

Phil:

 

Sounds like a real challenge.  I will definitely be pulling out the 22 inch for this one.  I am further south than many here and I have a clean view of the southern horizon.  

 

 The charts look helpful.  

 

I only have one question:

 

How do I find M22? 

 

(Sorry for the silliness but I just couldn't resist..)

 

Edit:  Sky Safari Pro does have GJJC-1 in it's database and with the Gala-extension, there's enough stars probably to star hop. 

 

And thanks for the links..  

 

Jon

[Sky King]

Very cool target! I had my 80mm ES scope and ASI533MC Pro camera out tonight and I thought I might get familiar with the neighborhood before zeroing in on this, kind of like a dress rehearsal. So just the scope and camera on an AVX mount. No post processing but I did rotate these so north was up. The second one added an OIII filter.

 

 

 

Edited by Sky King, 04 August 2021 - 06:34 AM.

[Sky King]

Then I zoomed around the OIII picture and took my best guess. I will come back with a bigger scope to see if I was correct. This is just a 80mm warm up. 

 

Edited by Sky King, 04 August 2021 - 06:29 AM.

[brownrb1]

Hi,

Attached is a Hubble image, in [O lll], of GJJC-1 that I found. I believe that the bright star to the right of the nebulosity is the white dwarf.

Dick

[Stargazer3236]

Here is my take on the elusive GJJC-1 planetary nebula. Not to hard to find with the right tools.

 

Orion XX14g, L-eXtreme filter (1.25"), ASI533MC Pro Camera (cooled to -10), darks, 4 sec exposure, gain 358, 5 min total exp.

 

 

 

Edited by Stargazer3236, 15 August 2021 - 03:37 PM.

[Keith Rivich]

Great challenge object! The first time I saw this planetary was with Larry Mitchell's 36" scope. Even with this aperture it still required blinking with an OIII to confirm the sighting. Since then I have bagged it with my 25" and 18" scopes. 

[Dave Mitsky]

Thanks for the mention in your very informative article, Phil.  Sighting GJJC-1 was among the most difficult deep-sky observations that I've ever accomplished.

[Old Speckled Hen]

 

 

How do I find M22? 

 

(Sorry for the silliness but I just couldn't resist..)

 

 

 

 

Oh, you may jest...

 

 

Going online reveals quite a bit of interesting information, eg that GJJC-1 is going through the cluster! etc.

 

Good luck astronomers, this lives up to the moniker, challenge.

 

Nice one Mr Harrington.

[Sky King]

For a number of reasons it looks like I am not going any farther with this month's challenge. However it is a very interesting challenge and I hope to explore it further. If I get anywhere I will post a new thread. I'm not sure that my C11 would have had the needed resolution, but I will try it when I can. Great cosmic challenge and interesting background description, thanks!

[Redbetter]

Then I zoomed around the OIII picture and took my best guess. I will come back with a bigger scope to see if I was correct. This is just a 80mm warm up. 

 

Stack_53frame_1096s_M22.jpg

 

Here is my take on the elusive GJJC-1 planetary nebula. Not to hard to find with the right tools.

 

Orion XX14g, L-eXtreme filter (1.25"), ASI533MC Pro Camera (cooled to -10), darks, 4 sec exposure, gain 358, 5 min total exp.

 

Stack_111frames_444s_WithDisplayStretch_Bingo.jpg

 

Stack_111frames_444s_WithDisplayStretch.jpg

 

Stack_102frames_408s_WithDisplayStretch.jpg

Unfortunately, those are tagging the wrong star as GJJC1 (or more accurately, its central star.)  I have looked at various finder charts, papers and viewed this object on 6/20/22.  It is slightly further NE.  This is apparent in Bertrand Laville's finder charts and sketch (CN link), and the photo in Phil's article as well.

[David Knisely]

Since I only have a 14 inch, I think I will wait for Pease 1 in M15, as it might be a tad easier. 

 

https://www.messier....m015_ps1fc.html

 

Clear skies to you.

Edited by David Knisely, 22 June 2022 - 07:53 PM.