11 replies to this topic

[astrovienna]

With the clouds, I'm finally getting a break from processing Mars images.  Abell 13 is an interesting ring-like planetary nebula in Orion.  The central star barely even registers, and the nebula itself is no brighter than mag 16, but with 18 hours of Ha it came through pretty well.  C11, SXVR-H694 with Astrodon 5nm Ha.  Full details on capture and processing are below the image at the link. 

 

https://pbase.com/image/171352836

 

Kevin

[petert913]

That is stunning !

[Eric Seavey]

I like it!  Should be called "ring of fire".

[j.gardavsky]

Excellent capture of this very faint PN!

 

Best,

JG

[Mert]

Great image, exellent!

[astrovienna]

Thanks everyone.  This PN is a bit off the beaten track, but it's not a super difficult target.  I'd love to see an image with a big CDK.

 

I like it!  Should be called "ring of fire".

Hi Eric,

 

Agreed.  Sometimes I include a bit of Ha in the blue channel to get a bit of a purple cast to the Ha, but this PN has virtually no OIII signature, and in RGB it was a nice bright crimson.  So I just mapped it all to red.  I like the effect!

 

Kevin
 

[Alex McConahay]

I like your shot. Much redder and more detailed than mine.

 

I just captured this last night. I have a much wider FOV, and less resolution on the PN itself. 

 

What is interesting is just how LITTLE information there is about it. I was trying to figure out some details about it. There appear to be a few dark patches just below the nearby bright star, the kind of dust obscuring dark nebula that covers stars in certain areas. But I can find nothing in the usual sources. It hardly gets a sentence in Wikipedia and less most other places. And nothing about the area. 

 

I was really thinking that my rig was not pointed correctly. I had to manipulate the screen stretch in Luminance and pretended to convince myself that I saw some change in the background where I thought the ring may be. Then, I started blue, and green, and definitely saw NOTHING that would indicate the ring. I went to sleep, and let SGP do the rest of the night (and another galaxy later on). So, I did not see the red subs. But, they did show something when I brought them up this evening. I guess I am saying that the ring is really very faint. I have not processed really yet, but it is a kinda cool object. 

 

Alex

[Dan Crowson]

Kevin,

 

nice image.

 

As someone else mentioned, this one doesn't appear to be as faint. I imaged this one with my cheap 12" RC (but under dark skies). I'm a 'light' processor and I seem to feel like I pulled more data in just LRGB.

 

https://www.flickr.c...on/32069729568/

 

It might be worth checking out.

Dan

[astroian]

Lovely image and nicely processed. The fainter nebulosity surrounding the ring is shown well, but not over processed.

Cheers, Ian

[lucam]

That's a really cool one, Kevin! Such a striking ring structure. 

 

I have been looking at a few PNs in Orion and there are some real gems. Have you ever attempted Kronberger 63?

 

--Luca

[astrovienna]

Dan and Alex, I'm impressed with your ambition here!  This target was tough in Ha, but I would think it would be much tougher in LRGB.  I guess really dark skies (not mine, unfortunately) will let you pull it out of the background, like in Dan's image.

 

Ian and Luca, thanks for the kind words.  I did in fact image Kn63 a while ago:

 

https://pbase.com/sk...image/170728796

 

I have no idea how Matthias could spot these things.  A really neat target.

 

Kevin

[Sacred Heart]

That is SUPER!!!  Really nice shot.   I did not know something like M57 existed in Orion.

 

              Thanks for sharing,   nicely done,    Joe