Tuesday 4 September 2012
Distant Comet C/2012 Q1 (Kowalski)
The full moon hampered the recovery of the discovery and the images above were obtained 2 days after full moon, the very bright sky and interference from high cloud causing a very bright and uneven background to the images.
At the time of writing, with just a week of positions measured for the new comet, it appears to be between 8-10 AU from Earth and 9-11 AU from the Sun, though any determination of its orbit is necessarily very uncertain without a much longer span of observations. However, at such a great distance, the coma size must be impressive, equating to about 150,000 km diameter.