M81

Ursa Major

Galaxy

Galaxy Core Image


M81 - Galaxy in Ursa Major - North is Up
Date: Mar 17, 2007 Time: 10:30 CDT Location: Haltom City Tx
Instrument: 253mm F/9 Ritchey Chretien Mount: AP1200GTO Guiding: STL - Internal Guide Chip
Extra Hardware: None Seeing: Fair Transparency: Fair
Camera: SBIG STL11K Filter Wheel: Internal Filter: AstroDon 6nm Luminance
Exposure: 16 x 600 Seconds Luminance Camera Control: MaximDL 4.11 Processing: MaximDL,Sigma-Reject, PSCS
Image Center: RA 09h 55m 38s, Dec +69d 03m 38s, Pos Angle -88d 40'
Effective Focal Length 2276.7 mm ~ .82" per Pixel
Notes: Dead Calm. Temp ~50 Degrees F. Guiding was ~ 1 arc second