M 51 - Spiral Galaxy

Canes Venatici

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Spiral Galaxy

M 51 - Spiral Galaxy - North is Up
Date: Feb 16, 2007 Time: 03:30 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 Clear
Exposure: 6 x 600 Seconds Luminance Camera Control: MaximDL 4.11 Processing: MaximDL,Sigma-Reject, PSCS
Image Center: RA 13h 30m 12s, Dec +47d 09m 10s, 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