M101 - Spiral galaxy in Ursa Major
Messier 101 - Spiral galaxy in Ursa Major
  • Description: Messier 101 - Spiral galaxy in Ursa Major. One of the larger galaxies in the northern sky, M101 (NGC5457) is about the size of the moon. Covering 29 x 27 arc minutes, M101 glows at magnitude 8.3. As that light is spread over such a large area, M101 can be tricky to spot in small scopes unless you are under fairly decent skies.

  • Camera: SBIG ST8
  • Telescope: Takahashi FSQ-106N
  • Filter: IR blocking Luminance Hutech type II.
  • Exposure: 4 x 20 minutes at -25C.
  • Guiding: self guided
  • Location: Wilson Coulee Observatory, Ab.
  • Date: March 4th 2005.
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