M 99 - Spiral Galaxy

Coma Berenices

Spiral Galaxy

M 99 - Spiral Galaxy
Date: Apr 21 2009 Time: 02:30 CST Location: Fort Griffin, Tx
Instrument: 253mm f/9 Ritchey Chretien Mount: AP900GTO Guiding: ST-10XME Internal Guider
Extra Hardware: Instrument Rotator Seeing: Good Transparency: Good
Camera: SBIG ST-10XME Filter Wheel: CFW-10 Filter: AstroDon L
Exposure: 5 x 600 Seconds L Camera Control: MaximDL 4.11 Processing: MaximDL,Sigma-Reject, PSCS

Image Center: RA 12h 19m 18s, Dec +14d 20m 02s, Pos Angle 262.12d
Effective Focal Length 2276.7 mm ~ .62" per Pixel
Notes: Calm. Temp ~45 Degrees F. Guiding was ~ .7 arc second