NGC2244: Open Cluster at Center of Rosette in Monoceros


NGC2244: Open Cluster

Object Data

Object type: Open Cluster and Emission Nebula
Size: 18 light years radius
Magnitude: 4.8
Constellation: Monoceros
Distance: 5,200 light years

The Rosette is lit by the young stars within this cluster. The radiation from the stars causes the atoms in the nebula to emit radiation themselves, and as a result, the emission nebula is produced. The hot stars in the NGC 2244 cluster are also responsible for the central hole in the Rosette Nebula. The hole is a result of the stars’ radiation blasting away the gas.The dark, stringy objects scattered through the nebula are known as Bok Globules, regions of compressed gas and dust in the first stages of star formation.  

Exposure Data

Date: 10/1 and 10/2/21
Location: Little Blair Valley, Anza Borrego Desert, CA
Telescope: DSI RC10c.  1867 mm fl at f/7.3
Camera: FLI 6303E CCD camera with Astrodon Ha and OIII (3nm) filters
Mount: AP 1100 mount GTOCP3
Exposure time: Ha:12 x 15 min (3 hrs), OIII: 10 x 15 min (2.5 hrs)
Exposure time total: 5.5 hrs
Bicolor image was color mapped by assigning Ha to Red, OIII to Blue and HaOIII blend to Green

FOV = 52 x 35 arc minutes  (image reduced 66% of original size)



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