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Contains:  12 Mon, NGC 2239, NGC 2244, NGC 2252, NGC2237, NGC2238, NGC2239, NGC2244, NGC2246, NGC2252, Rosette nebula, Sh2-275, The star 12Mon
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Rosette Nebula (Caldwell 49), 


            Sinan Arkin
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Rosette Nebula (Caldwell 49)

Technical card job: 2579683

RA center: 6h 32' 9"

DEC center: +4° 57' 40"

Pixel scale: 2.434 arcsec/pixel

Orientation: -3.469 degrees

Field radius: 1.408 degrees

Resolution: 3310x2530

Data source: Backyard


This is my first image with my new imaging setup. There is still a lot to tune. I haven't dialled in the backfocus distance behind the reducer yet, there is a lot of star flaring near the edges of the field (cropped). Also I believe guiding can be much improved. However before the lengthy process of fine tuning the equipment, I didn't want to loose the opportunity to image this magnificent object as I will soon loose sight of it due to obstructions in the west. I am quite pleased with this image as a first attempt.

Exposures are:

Ha: 45x300"
OIII: 54x300"
SII: 60x300"

Total Integration Time: 13.25 hrs

120 Flats for each filter
70 Darks
120 Biases



Sinan Arkin
License: None (All rights reserved)

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Rosette Nebula (Caldwell 49), 


            Sinan Arkin