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Contains:  NGC 2252, NGC 2244, Rosette nebula, NGC 2239, The star 12Mon
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Rosette Nebula (NGC 2237), 





    
        

            Miles Zhou
Rosette Nebula (NGC 2237)

Technical card

Resolution: 3287x2366

Dates:Oct. 26, 2012

Frames: 30x240"

Integration: 2.0 hours

Avg. Moon age: 11.69 days

Avg. Moon phase: 89.64%

Astrometry.net job: 159543

RA center: 6h 31' 54"

DEC center: +5° 2' 13"

Pixel scale: 2.636 arcsec/pixel

Orientation: 91.690 degrees

Field radius: 1.483

Description

Andromeda Nebula taken by NSP of Xingming Observatory, in combination with Mr. Maosheng Chen's originals (detailed below).
Exposure Total 46x180s at ISO 800; from which, 24 are acquired by Maosheng Chen. Thanks for Maosheng's generous offer of the raw files.
Processing IRIS: Stacking; two baches separately stacked, and added by an optimized ratio as discussed in Stacking_of_Two_Images (http://orianhealth.com/mediawiki/index.php?title=Stacking_of_Two_Images).
MaximDL: MaximDL generates two layers: the nebulocity and star layers. Nebulocity layer: Erode (3x3) --> DDP --> Gaussion (1.5) Star layer: A simple stretch
PS: Blending the nebulocity and star layers by Ligher; and a high pass layer blended by Overlay. Finally, some final touch (Color balance, brightness and contrast).

Two PS operations greatly improved the quality
1. High-pass layer blended by overlay (or alternatively, by Soft Light or other lightening blending modes)
2. Gaussion blur on the nebulocity layer.

Comments

Author

mileszhou
Miles Zhou
License: None (All rights reserved)
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Rosette Nebula (NGC 2237), 





    
        

            Miles Zhou