On February 25 Michael Mattiazzo (Swan Hill, Victoria, Australia)
reported on comets-ml a possible comet in SWAN spacecraft data moving
north through Pegasus. He noted that the comet appeared to be
brightening at magnitude 11-12 and would be visible low in the northern
hemisphere evening twilight. The position on Feb 25 was approximately
23h 23m +13 deg.

Various unsuccesful searches were made for the comet and it was listed
on the NEOCP on February 27. I tried searching for it yesterday evening
(Feb 27) using a Canon EOS550D and a 200mm, f/2.8L on a Star Adventurer
mount but had no luck due to haze near the horizon.

Finally, on February 28 the comet was imaged by Krisztián Sárneczky
(K88), Michael Jaeger (A71) and Luca Buzzi (204). Following Michael's
alert this evening I had another go with my 200mm lens and managed to
detect the comet as shown in the attached image. It is around 11th
magnitude.

Using the precise positions from tonight it appears that the comet was
detected yesterday on an image taken by Nico Lefadeux using a 200mm lens
but this is not confirmed.

The ephemeris below is based on a very short arc but it should help to
find the comet over the next few days. Astrometry of this new comet
would be very valuable.

Date (UTC).d   RA              Dec         delta   r     elong  mag
---- -- ----  -------------   -----------  ------ ------ -----  ---
2021 02 28.0  23 27 12.088   +13 01 42.62  1.4591 .68093  23.7 14.5
2021 02 28.2  23 28 07.040   +13 10 04.88  1.4591 .68201  23.8 14.5
2021 02 28.4  23 29 01.708   +13 18 25.78  1.4591 .68309  23.9 14.5
2021 02 28.6  23 29 56.124   +13 26 43.95  1.4591 .68415  23.9 14.5
2021 02 28.8  23 30 50.693   +13 34 59.00  1.4591 .68521  24.0 14.5
2021 03 01.0  23 31 45.634   +13 43 12.14  1.4591 .68627  24.1 14.5
2021 03 01.2  23 32 40.679   +13 51 24.49  1.4591 .68732  24.2 14.5
2021 03 01.4  23 33 35.444   +13 59 35.53  1.4590 .68836  24.2 14.5
2021 03 01.6  23 34 29.958   +14 07 43.77  1.4590 .68939  24.3 14.5
2021 03 01.8  23 35 24.628   +14 15 48.85  1.4590 .69041  24.4 14.5
2021 03 02.0  23 36 19.675   +14 23 52.00  1.4590 .69143  24.4 14.6
2021 03 02.2  23 37 14.830   +14 31 54.42  1.4590 .69245  24.5 14.6
2021 03 02.4  23 38 09.707   +14 39 55.54  1.4590 .69345  24.6 14.6
2021 03 02.6  23 39 04.335   +14 47 53.83  1.4590 .69445  24.6 14.6
2021 03 02.8  23 39 59.122   +14 55 48.89  1.4590 .69544  24.7 14.6

Nick James.