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 and its two brightest stars are HD 46223 of spectral classO4V, 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.

Imaging telescopes or lenses: Skywatcher Black Diamond 150/750 Newton
Imaging cameras: Canon EOS 1000D EOS 1000D , EOS1000Da
Mounts: EQ5 EQ-5 pro goto
Guiding telescopes or lenses: 80mm f5 Orion Shorty Autoguide scope Orion Short Tube 80mm/400FL/F5.0
Guiding cameras: Orion Starshoot Autoguider
Focal reducers: Baader MPCC Mark III Baader MPCC Mark lll
Software: DSS, PS, APT, Lightroom deepskystacker
Resolution: 1642×1080
Dates: Sept. 27, 2014
Frames: 21×120″ ISO800
Integration: 0.7 hours
Darks: ~10
Flats: ~22
Bias: ~30
Avg. Moon age: 2.56 days
Avg. Moon phase: 7.26%
Bortle Dark-Sky Scale: 1.00
RA center: 98.021 degrees
DEC center: 4.851 degrees
Pixel scale: 3.757 arcsec/pixel
Orientation: 101.185 degrees
Field radius: 1.026 degrees

Аuthor: galaad16, 20.10.2014