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M 101, The Pinwheel Galaxy (UMa)
Technical data: 15"f/5,4 Newtonian with Paracorr corrector SBIG ST10XME, CFW8 LRGB (L=8x600s; R=3x600s; G=3x600s; B=3x600s; color channels bin 2) Comments: night with medium transparency, mag 5,5 Author: Volker Wendel
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