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Old 14-09-2015, 12:33 PM
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5ash (Philip)
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Nebulae and globular star cluster in Corona Australis

Took this picture last night of NGC 6723 , 6726, 6727 & 6729. The two blue reflection nebula nebulae are NGC 6726 & 6727 and the small yellowish nebula is NGC6729 which surrounds the variable star R coronae australis. Below the nebula are dark obscuring dust clouds. You can also see arcs and loops in the blue nebula identified as Herbig Haro objects associated with energetic newborn stars.The small globular cluster on the upper left is NGC6723. Pictures were taken using a SW ED120 with an orion x0.8 focal reducer and Celestron nightscape camera (10.7Mp).
Picture comprises 30x 180 sec subs with darks , lights and flats. The first is the full picture and the following two are increasing crops to show the nebulae.
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Click for full-size image (NGC 6729 6726 -5c ps median2.jpg)
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Click for full-size image (NGC 6729 6726 -5c ps median cropped 2.jpg)
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Click for full-size image (NGC 6729 6726 -5c ps median crop cropped.jpg)
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Last edited by 5ash; 14-09-2015 at 12:37 PM. Reason: Cor
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Old 15-09-2015, 05:58 PM
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Atmos (Colin)
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It's looking pretty good there
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Old 16-09-2015, 08:26 AM
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jsmoraes (Jorge)
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Very nice image. The targets are very well registered. They are very beautiful. Congratulations.

The third photo, with tree nebulas, shows that perhaps the atmosphere betrayed you. We can see left red semi-halo in all stars.

I am having similar chroma with my photos. I think it is due to refraction of atmosphere since in my case I have red at left and blue at right side. Normally it can happens near the horizon. With me they are occuring a bit far from horizon also.
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