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Subject
NGC 281 With Ha luminance
Date
15th October 2005
Telescope or Lens
TEC APO 140
Mount
Paramount ME
Camera
ST2000XM
Filters
Custom Scientific 10nm Ha, TT RGB and Hutech LPR
Total Exposures L Ha 5 hours R 135 min G 90 min B 90 min
Sub exposure
15 x 20 min
9 x 15 min
9 x 10 min
9 x 10 min
Binning
Luminance 1 x 1. RGB 1 x 1 with focal reducer
Field of view and resolution
Approx 41 x 31Arcminute. 1.56 Arcsec / Pixel
Comments  
5 hours of hydrogen alpha luminance has been added to the RGB images taken for the traditional LRGB image of the 4th October 2005. Note the better contrast but slightly dimmer stars.