Arp's Loop and NGC3031 (M81) in Ursa Major (detail):
The true nature of Arp's Loop
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February 12- 19, 2010
RCOS 20- inch, Apogee Alta U16M, Astrodon E-Series filters
975 minutes Luminance, 135 minutes Red, 135 minutes Green and 135 minutes Blue (All unbinned)