Ha OIII RGB rendition of the Crescent Nebula, an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth.
This is the result of the collision of the recent stellar wind emitted by the star WR136 colliding with the older shell ejected when it became a red giant. |
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| Optic |
SW Quattro 8S 200mm f/4 with Baader MPCC Mark III corrector |
| Camera |
Atik 383L+ |
| Filters |
Baader Ha, OIII, R, G, B 36mm |
| Mount |
NEQ6 with EQASCOM
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Guide
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SW 70/500 with AlCCD5
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Frame center
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RA 20:11:25 DEC 38:25:58 J2000
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Date
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July August 2021
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Site
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Astrobioparco di Felizzano, AL, Italy
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| Exposures
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Ha - 24x900 @-10C bin 1x1
OIII - 36x900 bin 1x1
R - 24x300s bin 2x2
G - 12x300s bin 2x2
B - 26x300s bin 2x2
Integration time - 20h10m
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