M 13 - Globular Cluster

Hercules

Globular Cluster

M 13 - Globular Cluster - North is Up
Date: Jun 13, 2008 Time: 23:30 CST Location: Haltom City Tx
Instrument: 253mm F/9 Ritchey Chretien Mount: AP1200GTO Guiding: ST10XME - Internal Guider
Extra Hardware: None Seeing: Good Transparency: Fair
Camera: SBIG ST10XME Filter Wheel: CFW10 Filter: AstroDon Clear
Exposure: 3 x 300 Seconds Luminance Camera Control: MaximDL 4.11 Processing: MaximDL,Sigma-Reject, PSCS
Image Center: RA 16h 41m 58s, Dec +36d 27m 15s, Pos Angle -88d 40'
Effective Focal Length 2276.7 mm ~ .62" per Pixel
Notes: Calm. Temp ~78 Degrees F. Guiding was ~ 1 arc second