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Dale Conrad | all galleries >> Dale Conrad's Astrophoto Gallery >> Gallery of Galaxys > M101 Warts and All
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2011/04/23 D.M.Conrad

M101 Warts and All

Sedro-Woolley, Wa.

This 1.5 by 2.25 degree view in the constillation Ursa Major is centered at about RA: 14h01m51.374s DE:+54°18'29.99" with celestial north up and east to the left.
In addition to the Pinwheel Galaxy (M101) in the photo are fairly easily found NGCs 5485, 5473, 5477, 5474, and Holmberg IV. Most of these are members of the M101 group of galaxies.
NGC-5485 and 5473 are in the upper left, and NGC-5477 is a fainter smudge to the left and slightly above M101.
NGC-5474 at the bottom of the photo to the left of M101 is a dramatically asymetric galaxy.
At the right lower side of the photo is a what appears to be a bluish curved cloud; it is my assumption that this is the result of a reflection in the lens from a bright star out of the field of view.
In the lower right to the right of the reflection is Holmberg IV. There appear to be a number of smaller galaxies in the field of view that I have not identified.
The scope was slightly out of collimation, but not enough to be detrimental. I will have to look into extending the dew shield to keep more of the exta light out of the scope.

Hutech Clear Filter 40D,Borg 100ED F5.35 W 0.85 Reducer
24 X 5min. exposures stacked using nebulosity.
Baader IR/UV filter
8 dark, 30 bias frames with 16 flat frames used in preprocessing.
Final processing with Canon DPP
Older Mountain Instruments MI-250 tangent arm mount guided by StarShoot autoguider on a Borg 77Ach. full exif


other sizes: small medium large original auto
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