M 101 - Spiral Galaxy

Ursa Major

Spiral Galaxy

M 101 - Spiral Galaxy - North is Up
Date: Jun 21, 2009 Time: 00:30 CDT Location: Ft Griffin Tx
Instrument: 253mm F/9 Ritchey Chretien Mount: AP900GTO Guiding: ST10XE - Internal Guide Chip
Extra Hardware: Water Assist Cooling Seeing: Good Transparency: Fair
Camera: SBIG ST10XE Filter Wheel: RCFW-10 Filter: AstroDon LRGB
Exposure: 8 x 600 Seconds Luminance Camera Control: MaximDL 4.11 Processing: CCD-Stack,Sigma-Reject, PSCS

Image Center: RA 14h 03m 29s, Dec +54d 18m 30s, Pos Angle +272.7d
Effective Focal Length 2276.7 mm ~ .62" per Pixel
Notes: Variable Winds. Temp ~70 Degrees F.