This was taken under a 90% full moon , so there was a fairly bright sky. I also lost a lot of subs when the fog developed around 4a.m.
The image was taken at:
Gain 139
Offset 21
Exposures:
Luminance 114s x 65 binned 1 x1
Red, Green and Blue 114s x 24 binned 2x2
Calibration frames: Darks, Flats and Dark Flats.
PHD2 Dithering
Equipment: Celestron 9.25 XLT at F10, Skywatcher EQ6 Pro GEM, ZWO 1600MM Pro, ZWO EFW with ZWO LRGB filters, QHY5IIC guide camera on Skywatcher 9 x 50 finderscope
Software: Ascom 6, Eqmod, Cartes du Ciel, AstroPhotography Tool, PHD2, Sharpcap
Processing: DSS to align and stack the subs, PS CS5 to combine and stretch RGB and stretch Luminance and then to create LRGB. Lightroom 6 to develop image further.
Wikipedia: Messier 81 (also known as NGC 3031 or Bode's Galaxy) is a grand design spiral galaxy about 12 million light-years away, with a diameter of 90,000 light years, about half the size of the Milky Way, in the constellation Ursa Major. Due to its proximity to Earth, large size, and active galactic nucleus (which harbors a 70 million M☉ supermassive black hole), Messier 81 has been studied extensively by professional astronomers.
The image was taken at:
Gain 139
Offset 21
Exposures:
Luminance 114s x 65 binned 1 x1
Red, Green and Blue 114s x 24 binned 2x2
Calibration frames: Darks, Flats and Dark Flats.
PHD2 Dithering
Equipment: Celestron 9.25 XLT at F10, Skywatcher EQ6 Pro GEM, ZWO 1600MM Pro, ZWO EFW with ZWO LRGB filters, QHY5IIC guide camera on Skywatcher 9 x 50 finderscope
Software: Ascom 6, Eqmod, Cartes du Ciel, AstroPhotography Tool, PHD2, Sharpcap
Processing: DSS to align and stack the subs, PS CS5 to combine and stretch RGB and stretch Luminance and then to create LRGB. Lightroom 6 to develop image further.
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| M81 Bode's Nebula |
Wikipedia: Messier 81 (also known as NGC 3031 or Bode's Galaxy) is a grand design spiral galaxy about 12 million light-years away, with a diameter of 90,000 light years, about half the size of the Milky Way, in the constellation Ursa Major. Due to its proximity to Earth, large size, and active galactic nucleus (which harbors a 70 million M☉ supermassive black hole), Messier 81 has been studied extensively by professional astronomers.
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