Galaxy Messier 101 in Ursa Major

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	Exposure Date		20.04.2009 - 23.04.2009
	Camera		Artemis 4021
	Instrument		8" Photo Newton
	Mount		Gemini 41
	Filters		Baader LRGB Filterset
	Exposure time		(L,R,G,B)(16 x 19 x 19 x 18)* 600 s   Total 12 hours
	Image orientation		North is up, east is left
	Datareduction and image processing		THELI, PHOTOSHOP
	Imaging conditions		Seeing between 2,3" und 2,9" good transparency
	Object Data		Galaxy Size: 28.5'x 28.3' Brightness: 7.90 Surface brightness: 14.90 J2000 RA: 14h03m12.00s DE:+54°20'60.0"
	Distance to sun		around 27 Million Ly
	Description		Spiralgalaxy, Face on in Ursa Major. The diameter of M101 accounts to 170.000 Ly. M101 is nearly twice the size of our own milky way.