M 101 - Spiral Galaxy

Ursa Major

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Spiral Galaxy

M 101 - Spiral Galaxy - North is Up
Date: Feb 15,17, 2007 Time: 00:30 CST Location: Haltom City Tx
Instrument: 253mm F/6 Newtonian Mount: AP1200GTO Guiding: STL - Internal Guide Chip
Extra Hardware: Televue Paracorr Seeing: Good Transparency: Fair
Camera: SBIG STL11K Filter Wheel: Internal Filter: AstroDon 6nm Luminance
Exposure: 17 x 600 Seconds Luminance Camera Control: MaximDL 4.11 Processing: MaximDL,Sigma-Reject, PSCS
Image Center: RA 14h 03m 29s, Dec +54d 18m 30s, Pos Angle +272.7d'
Effective Focal Length 1754.7 mm ~ 1.06" per Pixel
Notes: Variable Winds. Temp ~20 Degrees F. Guiding was ~ 1 arc second