Uploaded 17-Nov-09
Taken 1-Mar-10
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Photo Info

Dimensions1341 x 1122
Original file size892 KB
Image typeJPEG
M51 - Whirlpool Galaxy

M51 - Whirlpool Galaxy

Date: 2/20/2009
Telescope: Orion 8" f/4.9
Camera: Canon 10D (modified)
Exposures: 19x300 seconds (1.6h) @ ISO800
Filter: Hutech IDAS LPS
Location: Mocksville, NC
Temp: 37F
Seeing: 1/5
Transparency: 3/5
Framing: 45% crop
Captured in Canon Raw, stacked using DeepSkyStacker, processed in Photoshop.

From Wikipedia.org:

The Whirlpool Galaxy (also known as Messier 51a, M51a, or NGC 5194) is an interacting grand-design spiral galaxy located at a distance of approximately 23 million light-years in the constellation Canes Venatici. It is one of the most famous galaxies in the sky. The galaxy and its companion (NGC 5195) are easily observed by amateur astronomers, and the two galaxies may even be seen with binoculars. The Whirlpool Galaxy is also a popular target for professional astronomers, who study it to further understanding of galaxy structure (particularly structure associated with the spiral arms) and galaxy interactions.