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Subject
M81
Date
22nd April 2004
Telescope or Lens
TEC APO 140
Mount
G11
Camera
ST2000XM
Filters
TT LRGB and Hutech LPR
Total Exposures L 150 min R 60 min G 40 min B 40 min
Sub exposure

6 x 10 min

12 x 5 min

10 x 3 min

12 x 5 min
8 x 5 min
8 x 5 min
Binning
Luminance 1x1 RGB 2x2
Field of view and resolution
Approx 41x 31 Arcminute. 1.56 Arcsec / Pixel
Comments  
Comments.
A variety of exposure lengths were taken in luminance to allow the fainter detail to be captured and to ensure the core was not burned out. Seperate processed images could then be produced so that the core and outer regions could be blended together. Camera temperature was set to -31 deg C and guided using the ST2000XM guide chip.