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Contains:  NGC 2239, NGC 2244, Rosette nebula, The star 12Mon
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The Rosette - NGC2237

Technical card

Dates:Feb. 24, 2017Dec. 27, 2017Dec. 29, 2017

Baader Planetarium Ha 1.25" 7nm: 26x600" -20C bin 1x1
Baader Planetarium O3 1.25" 8.5nm: 30x600" -20C bin 1x1
Baader Planetarium S2 1.25" 8nm: 45x600" -20C

Integration: 16.8 hours

Darks: ~50

Flats: ~50

Bias: ~50

Avg. Moon age: 15.50 days

Avg. Moon phase: 49.65%

Bortle Dark-Sky Scale: 5.00

Basic astrometry details job: 1915735

RA center: 6h 31' 58"

DEC center: +4° 58' 8"

Pixel scale: 0.800 arcsec/pixel

Orientation: 332.368 degrees

Field radius: 0.888 degrees

Resolution: 6239x4991

Data source: Backyard


My southern sky is obstructed by trees (bummer) and the Rosette just barely appears above the treetops for about an hour and a half in winter. It took two seasons to acquire the data for this and unfortunately last seasons Ha data was at a different image scale as I didn't yet have my FR installed. I had some major challenges in getting the channels to align and scale properly and fought elongated stars and misaligned colors due to some spacing issues before the FR was put on. I'm glad that I finally was able to put this image together - it's such a stunning target with rich and complex features. The differences in the channels was really striking and great to see.

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The Rosette - NGC2237,