ARP 18 - Peculiar Galaxy

Ursa Major

Peculiar Galaxy

ARP 18 - Peculiar Galaxy - North is Up
Date: Feb 15, 2007 Time: 11:30 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: 5 x 600 Seconds Luminance Camera Control: MaximDL 4.11 Processing: MaximDL,Sigma-Reject, PSCS
Image Center: RA 12h 05m 59s, Dec +50d 29m 47s, Pos Angle +272.7d'
Effective Focal Length 1754.7 mm ~ 1.06" per Pixel
Notes: Variable Winds. Temp ~20 Degrees F. Guiding was ~ 1 arc second
Peculiarity: Spiral with Detached Segments