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Subject
NGC 2237
Date
19 December 2004
Telescope or Lens
Tak FS60C with AP 0.75 focal reducer
Mount
G11
Camera
ST2000XM
Filters
Schuler 10nm Ha, Custom Scientific 4nm SII and OIII
Total Exposures L 120 min R 180 min G 120 min B 180 min
Sub exposure
Ha data 6 x 20 min
9 x 20 min
6 x 20 min
9 x 20 min
Binning
Luminance 1x1 RGB 1x1
Field of view and resolution
Approx 160 x 122 Arcminute. 6 Arcsec / Pixel
Comments  
The colours were assigned as follows: SII RED, Ha GREEN, OIII BLUE. This narrow band image of the Rosette Nebula, NGC2237 also shows other objects. The star cluster in the centre is NGC2244, and other areas of the nebula are designated NGC 2239 and 2246.