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Old 15-09-2015, 12:56 AM
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strongmanmike (Michael)
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IC 5148 The Cosmic Atom - with ultra faint outer OIII halo

This little planetary nebula is located in the constellation Grus (The Crane). The bright central ring is quite small at about 2.3 arc min in size while the ultra faint and rarely captured outer OIII halo extends out to about 6 arc min in diameter.

The outer halo is very elusive and a quick look around on the net confirms this but I think I got it all...?. The new narrower band pass 6nm Astronomiks have helped here but I recon 3nm may have helped delineate more structure in the faint halo, still, I'm happy with the three nights of imaging which once again took place in quite good conditions... I have been quite lucky in this department in recent times , with most nights at least average seeing but many above average to good

Hope you like....The Cosmic Atom
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Last edited by strongmanmike; 15-09-2015 at 01:15 AM.
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Old 15-09-2015, 01:22 AM
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batema (Mark)
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Amazing looking object and beautiful colours.
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Old 15-09-2015, 02:30 AM
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I follow all your works because everithing you shootis a masterpiece! The outer halo has to be incredibly weak!
Cheers,
Fabiomax
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Old 15-09-2015, 03:01 AM
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Another beautiful little planetary. Nice!
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Old 15-09-2015, 06:42 AM
Placidus (Mike and Trish)
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Mike, that's awesome.

The faint outer halo, clean and grit-free, looks like a dragon-serpent wrapped protectively round its brilliant opal egg. The opal itself is unbelievably sharp.

Far out!
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Old 15-09-2015, 08:00 AM
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Super image Mike. I did a test image of that one myself last night. The inner section is quite bright but I imagine that outer halo is super faint.

Greg.
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Old 15-09-2015, 08:56 AM
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Nice detail Mike and the colour is great too.
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Old 15-09-2015, 09:37 AM
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Well you don't see that everyday!
Another cracker image Mike
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Old 15-09-2015, 10:20 AM
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Excellent Mike!
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Old 15-09-2015, 10:29 AM
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Nicely done, Mike! The only other image I have seen that shows so much of the halo is the one by Don Goldman (who had the slight advantage of a CDK20.)

I have a lot of hours on this target from last year. I was trying to improve on Don's Oiii by collecting a lot more data with my puny 300mm scope but didn't really succeed. I was battling read noise all the way. I should get around to processing it, I suppose...

Cheers,
Rick.
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Old 15-09-2015, 11:15 AM
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Thanks heaps guys glad you all found it intriguing

Yes, Don's image is great and yep aperture rules here but I recon the fast optics of the AG12 has allowed me to do an ok job considering the difference in site and equipment? I think my handling of the main ring holds up more than well but and apart from the bigger aperture, I think the 3nm OIII filter Don used was handy too as we both have the same extent of the outer halo but he has revealed higher detail and features within that halo...anyway, we use what we have to best of our ability and be happy with that I guess?

Mike
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Old 15-09-2015, 11:24 AM
Stevec35 (Steve)
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Nicely done as usual Mike. I did the halo about a year ago. It took me 18.5 hours of OIII and I don't think I did it as well as you. Of course faster optics would help.

Cheers

Steve

http://members.pcug.org.au/~stevec/I...L6303_RC14.htm
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Old 15-09-2015, 12:14 PM
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That's brilliant Mike, some very delicate detail in the main shell and the outer one looks intriguing; ghostly and indeed ultra faint!
It's truly fascinating how many of these faint PN outer shells that have been revealed in detail by amateurs in recent years.
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Old 15-09-2015, 12:23 PM
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Quote:
Originally Posted by Stevec35 View Post
Nicely done as usual Mike. I did the halo about a year ago. It took me 18.5 hours of OIII and I don't think I did it as well as you. Of course faster optics would help.

Cheers

Steve

http://members.pcug.org.au/~stevec/I...L6303_RC14.htm
Yeah I remember yours now Steve, nice, it is a difficult object to process huh?

Quote:
Originally Posted by SkyViking View Post
That's brilliant Mike, some very delicate detail in the main shell and the outer one looks intriguing; ghostly and indeed ultra faint!
It's truly fascinating how many of these faint PN outer shells that have been revealed in detail by amateurs in recent years.
Thanks SkyViking Sigmarson Olofsen

This was difficult to process, after heavy stretching the OIII was pretty bloody noisy, so then the noise filtering had to be done very carefully so as not to remove details but also and perhaps more importantly, not to add details or features that weren't there! I think I succeeded in this anyway...but I would love a 20" to make life easier

Mike
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Old 15-09-2015, 01:39 PM
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Originally Posted by strongmanmike View Post
..anyway, we use what we have to best of our ability and be happy with that I guess?
Amen
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Old 15-09-2015, 01:51 PM
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graham.hobart (Graham stevens)
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Ic 5148

So Mike, you working on an Atlas of planetary Nebs?
Excellent as always.
Cheers
Graham
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Old 15-09-2015, 03:00 PM
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Amen
Well, one day I would love a 24" F3 well corrected scope .....buuut not holding my breath on that one

Quote:
Originally Posted by graham.hobart View Post
So Mike, you working on an Atlas of planetary Nebs?
Excellent as always.
Cheers
Graham
He he yeah, PN's are such fun and usually very beatiful little things to image, bit like butterflies (I'd imagine?) and it's been a bit of a side course for me lately huh?...I do love galaxies at heart though

Mike
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Old 15-09-2015, 03:01 PM
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Excellent image Mike.

Steven
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Old 15-09-2015, 04:43 PM
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There is definitely some mystical beauty and impalpable aroma emanating from the last burp of a dying star...great image Mike
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Old 15-09-2015, 05:33 PM
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strongmanmike (Michael)
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Excellent image Mike.

Steven
Cheers Steven

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There is definitely some mystical beauty and impalpable aroma emanating from the last burp of a dying star...great image Mike
Nicely put, I agree Slaw

Mike
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