Comet 2004 R2 ASAS. January 7, 2005.
Combination of 5, 3 minute images, SBIG ST-8E CCD.
18" f/10.5 Ritchey-Chretien telescope at prime focus
Comet 2004 R2 ASAS was quite bright at discovery and peaked at about magnitude 6 a few weeks later, just before it reached perihelion. However after perihelion in mid-October 2004, the brightness fell precipitiously and by the time this image was taken, the comet was below 18th magnitude!