Astrophotography by David Gares
M101 Pinwheel Galaxy

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m101.jpg
M101 Pinwheel Galaxy (Click to enlarge)

Object Details:
 
Object Type:  Spiral Galaxy
Constellation:  Ursa Major
Distance:  Approximately 27 million light-years
Diameter:  Approximately 170,000 light-years
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M101 Pinwheel Galaxy
 
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).
 

Image Details:
Film Roll
 
Date:  April 17, 2004
Site:  Harahan, LA
Exposure:  CCD, 5 x 5 min., f/3.3 reducer
Filters:  Orion Skyglow (Broadband LPR)
Processing:  MSB Astroart 3.0
Telescope:  10" f/10 Meade LX200 SCT
Mount:  Milburn Wedge
CCD:  Starlight Express MX7C (Color)
Autoguider:  S.T.A.R. 2000