2021a1 20211223 0153 molason

A cloudy evening on 2021 December 23 UT until it cleared with the comet at an altitude of 6 degrees. The comet was much different than 2 evenings ago when I last imaged it, the coma was only 6' wide, the tail still >1 degree long at PA 94 degrees but with no detail in the tail in that 1 degree and the comet much fainter. Astrometrica calculated magnitudes of G=4.7 using 10x10s green filter images and G=4.5 using 5x10s images with no filter. A color image composed of RGB 30s each, showed only a green comet at an altitude of 6 degrees.