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.

Page last updated: Mon 24 Jan 07:35:28 GMT 2022