Comet C/2009 P1 (Garradd)
Date: August 25, 2011 9:19PM PST
There is only a dust tail visible in this resultant narrow field photo of Comet Garradd. This comet is well-placed for early evening viewing, although as the star trails in this photo covering 20 minutes of elapse time illustrate, it is moving quite fast.
Location: Victoria Centre Observatory, Observatory Hill, Victoria, BC, Canada
Equipment: QSI 583C CCD camera; Meade LX200 f/10; Paramount ME; no guiding
Image parameters: 11x2 min exp, 1x1bin; one shot colour. 10x1 minute dark frames; 10x1 minute bias frames. 20°C ambient temperature; CCD temperature -13.2°C
Processing:
ImagesPlus 4.25 x64 - Auto OCS CCD Processing for generic RGB; calibrate using Dark & Bias Frames. Manually align on comet head. Digital Development - extreme contrast stretch (BP=125).
ACDSee Pro 4: reduce colour depth from 48 bit to 24 bit; rotate and resize; save as jpg.