Astrophotography by David Gares

Pinwheel Galaxy M101

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M101, the Pinwheel Galaxy, is a difficult target in the city.  I can't see it in the telescope.  It was getting low in the sky so I cut the exposure short and moved on; hence it's underexposed and lacks contrast.  From a dark site the spiral arms can be seen visually and it photographs very well.  It was discovered in 1781 and declared to be a "spiral nebula" (the concept of galaxies was unknown at the time).

 Pinwheel Galaxy M101
 (Click image to enlarge)


 Object Details:  
 Type:  Spiral Galaxy
 Constellation:  Ursa Major
 Distance:  27 million light-years
 Diameter:  170,000 light-years

 Image Details:
 Date:  April 17, 2004
 Site:  Harahan, LA
 Exposure:  CCD, 5 x 5 min.
 Filters:  Orion SkyGlow LPR
 Processing:  MSB Astroart 3.0
 Telescope:  10" Meade LX200
 Reducer:  Meade, f/4.3
 CCD:  Starlight Express MX7C
 Autoguider:  S.T.A.R. 2000