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Contains:  NGC 2252, NGC 2244, Rosette nebula, NGC 2239, The star 12Mon
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NGC 2244 Rosette Nebula in BiColor Ha & OIII, 


            Douglas J Struble
NGC 2244 Rosette Nebula in BiColor Ha & OIII

NGC 2244 Rosette Nebula in BiColor Ha & OIII

Technical card

Resolution: 3036x3794

Dates:Jan. 7, 2018Jan. 14, 2018

Astrodon Ha 5nm: 75x240" (gain: 139.00) -20C bin 1x1
Astrodon OIII 3nm: 42x240" (gain: 139.00) -20C bin 1x1

Integration: 7.8 hours

Darks: ~50

Flats: ~50

Bias: ~250

Avg. Moon age: 23.97 days

Avg. Moon phase: 35.45%

Bortle Dark-Sky Scale: 6.00 job: 1923025

RA center: 98.233 degrees

DEC center: 5.019 degrees

Pixel scale: 2.319 arcsec/pixel

Orientation: 109.585 degrees

Field radius: 1.565 degrees

Locations: Backyard Red Zone Observatory, Taylor, MI, Michigan, United States

Data source: Backyard


NGC 2244 (also known as Caldwell 50) is an open cluster in the Rosette Nebula, which is located in the constellation Monoceros. This cluster has several O-type stars, super hot stars that generate large amounts of radiation and stellar wind.

The age of this cluster has been estimated to be less than 5 million years. The brightest star in the cluster is 12 Monocerotis, a foreground K-class giant. The two brightest members of the cluster are HD 46223 of spectral class O4V, 400,000 times brighter than the Sun, and approximately 50 times more massive, and HD 46150, whose spectral type is O5V, has a luminosity 450,000 time larger than that of our star, and is up to 60 times more massive, but it may actually be a double star.



Douglas J Struble
License: None (All rights reserved)

Sky plot

Sky plot


NGC 2244 Rosette Nebula in BiColor Ha & OIII, 


            Douglas J Struble