Contains: NGC 2244, Rosette nebula, NGC 2239, The star 12Mon
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Technical card

Resolution: 1200x896

Dates: Dec. 1, 2017

Frames: 28x600"

Integration: 4.7 hours

Avg. Moon age: 12.29 days

Avg. Moon phase: 93.21%

Astrometry.net job: 1843934

RA center: 97.986 degrees

DEC center: 4.981 degrees

Pixel scale: 3.956 arcsec/pixel

Orientation: 81.819 degrees

Field radius: 0.823 degrees

Description

December 1, 2017 - We were very close to a full moon last night, so my astro imaging options were limited to narrowband. I spent most of the night with Hydrogen-alpha, an inexpensive 12nm Astronomik filter, but as you can see, able to bring out some fantastic contrast, depth, and details throughout this region of interstellar ionized hydrogen. (This is the filter I currently have in the 1.25" wheel. My Baader 6nm Ha is in the 2" filter wheel)

The "Rosette Nebula" is a cluster of nebulosity that includes NGC 2237, NGC 2238, NGC 2244, NGC 2239, NGC 2246 and more. The Rosette is a bright mag 9 area of the sky about 1.3° across in the constellation Monoceros. (subframe info: 28 600 second exposures in hydrogen-alpha, no calibration frames, Atik414Ex mono CCD running at -10C, Astronomik 12nm Ha filter, William Optics GT-81, CEM25P EQ mount, WO 50mm guidescope with ZWO ASI120S-MM guide cam, INDI/KStars/Ekos observatory control).

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Author

Chris Howard
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Rosette Nebula, 




    

        Chris Howard