M81

Ursa Major

Galaxy

M81 - Galaxy in Ursa Major - North is Left
Date: Feb 05, 2007 Time: 10:30 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: 9 x 600 Seconds Luminance Camera Control: MaximDL 4.11 Processing: MaximDL,Sigma-Reject, PSCS
Image Center: RA 09h 56m 14s, Dec +69d 01m 56s, Pos Angle +272.7d'
Effective Focal Length 1754.7 mm ~ 1.06" per Pixel
Notes: Dead Calm. Temp ~30 Degrees F. Guiding was ~ 1 arc second
Full Moon