Messier 81
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Image by Kevin Hearst 

Messier 81 - NGC 3031

"Bode's Galaxy"

  • TYPE:  Spiral Galaxy, Type SA(s)ab I-II
  • RA: 09h 55.6'
  • DEC:  +69degrees 04'
  • SIZE:  24.0' X 13.0'
  • VISUAL MAGNITUDE:  6.9
  • SURFACE BRIGHTNESS:  13.0
  • CONSTELLATION:  Ursa Major
  • DISTANCE:  4.5 Million Light Years
  • DIAMETER:  53 Thousand Light Years

IMAGING INFORMATION

  • TELESCOPE:  RCOS Carbon fiber 10 inch R/C reflector, on a Parramount GT1100
  • REDUCER/CORRECTOR:  None / operating at 9.0 FL
  • CAMERA:  Santa Barbara Instruments Group, ST-8XME Digital (Thermoelectrically cooled)
  • ADAPTIVE OPTICS:  None, Off-axis guiding with a ST402XME and a Astro Don ROAG
  • FILTER(S):  Astro Don LRGB
  • CCD COOLING TEMPERATURE:  -20 C
  • BINNING/RESOLUTION:  2 X 2 (765 X 510) LRGB resized to 1530x1020
  • EXPOSURE TIME:  5 min. Luminance,Red, Green, Blue.
  • NUMBER OF IMAGES:  12, 12, 12, 12
  • FILM SPEED:  None
  • DATE/TIME:  12-31-2008 / 08:15:01.709 UTC
  • LOCATION:  Valley Center, California
  • TEMPERATURE:  52 degrees
  • HUMIDITY:  43%

 

All the images in this site are Copyright 1999-2015 by Kevin Hearst.
Commercial use of these images without the prior written consent or knowledge of the author is strictly prohibited..