The Pinwheel Galaxy (also known as Messier 101 or NGC 5457) is a face-on spiral galaxy distanced 21 million light-years from Earth in Ursa Major. At 170,000 light-years across it is 70% larger than our own Milky Way galaxy and has a disk mass of over 100 billion solar masses.
Taken: Feb. 21, 2012
Telescope: AT8RC at f/8 (0.68 arcsec/pixel) - FOV 28.6 x 37.9 arcmin
Mount: G11 w/ Gemini II
Camera: SBIG ST8300M @ -25C
Filter(s):
IDAS LPS-P2-48
Luminance 15 x 5min. bin 1x1
Red 9 x 5min. bin 1x1
Green 9 x 5 min. bin 1x1
Blue 9 x 5 min. bin 1x1
Exposure Time: 3.5 hours
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