Third consecutive night that comet was visible. 2020 July 12/13 (Sunday night) it is still easy naked eye but tail seemed shorter tonight but also possibly broader. Tail more like 3 deg in 10x50s. Possibly also fainter overall but some haze in NNE so difficult to be sure. Moon seemed much more of a problem tonight (Sunday night) than on Saturday night although Milky Way still naked eye through Cygnus. Still a great sight and enjoyed showing it to a neighbour. Observed from 00:15 to 01:30UT.
British Astronomical Association
Supporting amateur astronomers since 1890