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M101 - The Pinwheel Galaxy

22:50 13/4/2007 UTC

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M101 taken under dark sky in Artjärvi. Too bad I quit imaging after clouds rolled in, since sky cleared later and sky went very dark. Even the conditions weren't the best possible, sky was dark enough to enable 5 minute subs. Even longer subs could have been possible. In 5 minutes sky barely moves the histogram. I also adjusted my polar scope which seemed to improve the polar alignment a lot.

NGC/IC Object List:
NGC5457 galaxy RA:14h03m12.4 Dec:+54°20m'58" BMag: 8.2, M 101 Pinwheel Galaxy
NGC5477 galaxy RA:14h05m33.0 Dec:+54°27m'39" BMag:14.3, UGC 9018
NGC5473 galaxy RA:14h04m43.5 Dec:+54°53m'36" BMag:12.4, UGC 9011
NGC5422 galaxy RA:14h00m41.8 Dec:+55°09m'53" BMag:12.9, UGC 8935
NGC5485 galaxy RA:14h07m11.4 Dec:+55°00m'05" BMag:12.3, UGC 9033
NGC5486 galaxy RA:14h07m24.9 Dec:+55°06m'11" BMag:13.9, UGC 9036

m101-2007.04.13-22h50m.jpg

[High Resolution : 1600x1200 332kB]

Camera: Modified Canon EOS 350D (Rebel XT) | Telescope: Skywatcher ED80 Pro 80mm f7.5 refractor, William Optics 0.8x focal reducer | Mount: Orion Skyview Pro, Boxdoerfer PowerFlex MTS-3SLP drive controller | Filters: Baader IR/UV block | Guiding: Orion ShortTube 80mm f5 refractor, QCGuider, Teleskop-Service 1.5x Barlow, Phillips ToUCam Pro II webcam | Exposure: 8x300s (40m) ISO800 f6, 6 darks, 15 flats, bias | Software: IRIS, GIMP | Location: 60°44'N 26°12'E (Tähtikallion Observatory/Artjärvi, FI) | Target altitude in the beginning of the exposure 83°

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Added: 17:34 15/4/2007 UTC