Pinwheel Galaxy, M 101, NGC 5457

Note: Reduced 50%
Object: Face-on Spiral Galaxy (SAB(rs)cd)
Constellation: Ursa Major
Apparent Magnitude: 8.3
Est. Distance: 27 Mly
Telescope: Celestron CPC 800 EQ Mount (with Wedge) with f/6.3 Focal Reducer
Camera: QHY-8
Exposure: 32x120 sec (64 mins)
Guidescope: Orion EON 80mm ED
Guider: DMK 21AU04 with PHD Guiding
Date: 10nd July 2009
Wikipedia link

Telescope: Celestron CPC 800 (8")
Camera: Nikon D70 unmodified
Exposure: 322x30 sec (162 mins)
ISO: 1600
Date: 9th June 2008

Annotated Version