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Object name: NGC2237 / 2244 Rosette Nebula   Optics:   TEC 110 FL Fluorite Apo with original flattener
  Objekt type: Emission nebula   Focal lenght:   110 mm
  Constellation: Monoceros (Einhorn)   Camera:   FLI Microline 16803-65
  Location/Date: Remseck / 14. February 2017   Exposure:   14 x 1200sec H-alpha / 14 x 1200sec O III / 8 x 1200sec SII / 3 x 300sec RGB
  Distance: approx. 5500 Lj   Filters:   Astrodon 3 nm narrowband filters / Baader LRGB filters
  Apparent dimensions:): approx. 80' x 60'   Mount:   10micron GM2000 HPS
  Real dimensions:     Autoguiding:   Off-Axis Guider - SX Lodestar
  Brightness: approx. 6m   Software:   MaxIm DL / Registar / Photoshop CS5 / PixInsight / Straton
  Position (R.A. / DEC): 06h 30' 42" / +05° 01' 00"   Image processing:   Tone mapping according to real colors
 
 

Explanation:

The above shown image consists of 2 objects. Located In the center of the nebula is the open cluster NGC 2244 which stimulates the surrouning gas to glow. The nebula itself consists of NGC 2237, NGC 2238, NGC 2239 und NGC 2246. It's expansion at the night skies is huge and is about 5x full moon diameter.