2021a1 20210912 rroberto

 30x10s with the Frasso Sabino telescope (Diameter 369mm, focal length 2468mm, approximately F/6.66).
Scale 1".34/pixel, field of 22'.8x28'.5 with north up and east to the left. The comet was very low on the horizon from 11° to 12° and obviously the seeing was bad but it shows quite well the coma and a slightly fan-shaped tail so I think of type II. The magnitude estimated with Astrometrica is 13.2 with a coma of 24" (0'.4) corresponding to 18 pixels in diameter. What you see is a sum with a lot of contrast.