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Contains:  NGC 2252, NGC 2244, Rosette nebula, NGC 2239, The star 12Mon
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Rosette Nebula (Caldwell 49), 


            Sinan Arkin
Rosette Nebula (Caldwell 49)

Rosette Nebula (Caldwell 49)

Technical card

Resolution: 3310x2530 job: 2579683

RA center: 98.039 degrees

DEC center: 4.961 degrees

Pixel scale: 2.434 arcsec/pixel

Orientation: 3.471 degrees

Field radius: 1.408 degrees

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)

Sky plot

Sky plot


Rosette Nebula (Caldwell 49), 


            Sinan Arkin