Comet 46P/Wirtanen on Dec 12, 2007
Comet 46P/Wirtanen is a short period (5.4 year) comet discovered in January 1948 by Carl Wirtanen at the Lick Observatory. According to the JPL Horizons Ephemeris it is currently magnitude 13.1, several other sites have it at magnitude 11.5 and 11.6.
Image taken from light polluted Louisville, CO with Celestron Nexstar11 telescope, F3.3 focal reducer, and Astrovid Stellacam II video camera (9/14 gain, 128 integration (4 sec), 0 gamma), 30 frames taken at 6:29 to 6:31 pm and 6:40 to 6:42 pm. Images flat field corrected, dark subtracted, aligned, stacked, and histogram adjusted with Registax4. Two resulting images were then aligned, text added, brightness adjusted, cropped, and animated with Photoshop Elements2. Sky was mostly clear, temperature 29°F, no wind, high humidity, transparency very good, and poor turbulence, maybe 4/10.