Corona Australis by the Bunyip - Final with Colour
I finally collected the colour data for my Corona Australis image (NGC 6723, 6726, 6727, 6729, and IC 4812). I had collected and processed the luminance late last year, but had to wait till now before acquiring all the RGB data. I did originally collect it last year but made the mistake of acquiring the green data on a different night and hadn't realised that some of the nebulae are variable due to the variable stars R and TY Coronae Australis, which skewed my original colour data.
That's a great picture David. You brought up the colors beautifully. I just feel that your stars are a little clipped. Most noticable in the cluster and bright ones. Top shot nonetheless.
That's a great picture David. You brought up the colors beautifully. I just feel that your stars are a little clipped. Most noticable in the cluster and bright ones. Top shot nonetheless.
Thanks Marc! I guess you mean slightly white clipped? Looking at the luminance stretching, the histogram shows a tiny spike at the extreme right even before any stretching. This is a little taller after some basic stretching, so I don't see any way to avoid it? It was an exceptionally steady night when I took the luminance, so perhaps the stars are showing sharper edges around the saturated cores where they would usually be a little softer?
Detail is amazing David right into the core of the globular, there is even a couple of beautiful spiral galaxies in there one lower left. Looks wonderful at full size.
A beautiful image, I really enjoyed panning this incredible view and only wished my 1920x1200 monitor was larger so I could take it in all at once, although scrolling around was enjoyable as each exquisite sub-object slid into view. The clarity and detail is quite breathtaking.
Beautiful image. My only complaint is the framing cut off a small part of the glob. Otherwise, wow, that is a super Corona Australis. This newt of yours is sensational and beautiful processing as well.
I see you got a couple of great looking spiral galaxies there as well. That one on the left looks like M101.
Greg.
Last edited by gregbradley; 30-05-2013 at 09:07 PM.
That is one fine image David. The full size image shows a wealth of detail and is very interesting looking at the center of the nebula and the galaxy looks very cool. I spent around the same amount of exposure time on this target and it shows how much detail a 12.5" can gain over a 4" scope. Resolution is very nice.
Maybe just a touch red in the dust for me, but still a fab image.
Well, that's moderately amazing! Love the detail in the reflection nebs. Sublime. Zoomed right in the glob seems a little harsh, but what a fantasic FOV to swim around in.
Detail is amazing David right into the core of the globular, there is even a couple of beautiful spiral galaxies in there one lower left. Looks wonderful at full size.
John.
Thanks John, there was excellent seeing on the night I took the luminance so the resolution is at peak value for the scope.
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Originally Posted by alpal
Great pic David & I like that spiral galaxy too.
Thanks Allan!
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Originally Posted by Larryp
Top notch, David! Beautiful colours
Thanks Larry!
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Originally Posted by Gem
Superb!!!
Image of the week material!
Thanks Grant!
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Originally Posted by Dennis
A beautiful image, I really enjoyed panning this incredible view and only wished my 1920x1200 monitor was larger so I could take it in all at once, although scrolling around was enjoyable as each exquisite sub-object slid into view. The clarity and detail is quite breathtaking.
Cheers
Dennis
Thanks Dennis; great comments much appreciated!
Quote:
Originally Posted by gregbradley
Beautiful image. My only complaint is the framing cut off a small part of the glob. Otherwise, wow, that is a super Corona Australis. This newt of yours is sensational and beautiful processing as well.
I see you got a couple of great looking spiral galaxies there as well. That one on the left looks like M101.
Greg.
Thanks Greg! I meant to have the glob hugging the top but it went a bit higher than intended; still, put it down to artistic licence showing the cosmos flowing on to infinity and beyond ...
Quote:
Originally Posted by Paul Haese
That is one fine image David. The full size image shows a wealth of detail and is very interesting looking at the center of the nebula and the galaxy looks very cool. I spent around the same amount of exposure time on this target and it shows how much detail a 12.5" can gain over a 4" scope. Resolution is very nice.
Maybe just a touch red in the dust for me, but still a fab image.
Thanks Paul! Actually I looked at various images of the region on the web and they all rendered the dust areas quite dark; on stretching the image I thought that there was a bit of detail that showed up in the darker areas that could be brought out further. These darker areas tended to be redder in my data so it sort of came out as a consequence of my stretching.
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Originally Posted by DJT
Thats a beautiful image, marvelous colours.
Thanks David!
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Originally Posted by strongmanmike
Sensational David, the colour was a while coming but wow!
The central nebula looks very 3D, beautiful
Mike
Thanks Mike; actually probably a good thing that the colour was a while coming as it gave my processing skills a chance to catch up somewhat with the quality of luminance data I had collected
Well, that's moderately amazing! Love the detail in the reflection nebs. Sublime. Zoomed right in the glob seems a little harsh, but what a fantasic FOV to swim around in.
Thanks Rob! Since the field takes in multiple objects I had to decide on a sub length for my luminance to suit all; I went with 15 minutes to bring out the faint nebulae but the compromise is that this is longer than I might choose for the globular alone, so some of the stars are a little saturated. I could take some more subs for the globular and layer them in I suppose ... perhaps a future enhancement ....
I think the magenta/red tinge in the dust may well be quite accurate as there is likely some Ha & Hb in there as well, in any case I like it, lovely colour saturation
