M101 - Pinwheel Galaxy & NGC 5474 -100616

This image of Messier 101, the Pinwheel Galaxy, is an early effort taken with my modified Canon 450D on my SkyWatcher ED-100. With only 15 ten-minute frames (2.5 hours of exposure), the result could be improved upon, but it's a good start for now.

M101 is a face-on spiral galaxy located in the constellation Ursa Major (the Great Bear, also containing the Big Dipper). At 21 million light-years from Earth, M101 has a diameter of 170,000 light-years making it roughly equal the size of our own Milky Way galaxy.


Astrometry Details

Image Center: View full size annotated image.
   Right Ascension: 14h 3m 33.245s (210° 53m 18.682s)
   Declination: +54° 16m 55.425s
Orientation: Up is 86.8 degrees West of North.
Image Size: 1.414° x 56.466' Pixel Scale: 1.186"


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