Electronic Telegram No. 5093 Central Bureau for Astronomical Telegrams Mailing address: Hoffman Lab 209; Harvard University; 20 Oxford St.; Cambridge, MA 02138; U.S.A. e-mail: cbatiau@eps.harvard.edu (alternate cbat@iau.org) URL http://www.cbat.eps.harvard.edu/index.html Prepared using the Tamkin Foundation Computer Network COMET C/2022 A2 (PANSTARRS) R. Weryk, Department of Physics and Astronomy, University of Western Ontario, reports the discovery of another comet in images obtained on Jan. 10 UT with the Pan-STARRS2 1.8-m Ritchey-Chretien reflector at Haleakala, in which four stacked 45-s w-band survey images show a condensed coma of size 1".9 (full-width-at-half-maximum) in 1".7 seeing, with no obvious tail. After finding that the comet appeared cometary, Weryk found the object in objects taken on the previous night, as well, in which four stacked 45-s w-band survey images show a condensed coma of size 1".5 (FWHM) in 1".3 seeing, again with no obvious tail. The first two nights of observations are tabulated below. 2022 UT R.A. (2000) Decl. Mag. Jan. 9.60508 12 04 33.01 -20 34 40.4 19.9 9.61524 12 04 32.91 -20 34 39.5 20.0 9.62542 12 04 32.81 -20 34 38.6 19.9 9.63561 12 04 32.70 -20 34 37.7 19.8 10.61747 12 04 22.77 -20 33 06.9 20.5 10.62869 12 04 22.62 -20 33 05.5 20.7 10.63972 12 04 22.51 -20 33 04.7 20.7 10.65061 12 04 22.36 -20 33 03.3 20.6 Y. Ramanjooloo, Institute for Astronomy, University of Hawaii, writes that follow-up observations were obtained with the University of Hawaii's 2.2-m reflector at Mauna Kea on Jan. 12.6 UT, in which three 180-s exposures show a very condensed coma of size 1".7 (FWHM) in 1".5 seeing, with no obvious tail. Weryk adds that four additional 45-s w-band survey images taken with the Pan-STARRS2 reflector on Jan. 31.53-31.57 in 1".5 seeing show a very condensed coma of size 1".94 (FWHM) with no tail. The available astrometry appears on MPEC 2022-C01. The following parabolic orbital elements by S. Nakano (CBAT) are from 67 observations spanning Jan. 9-31 (mean residual 0".3). T = 2023 Feb. 18.39842 TT Peri. = 88.38399 Node = 171.58321 2000.0 q = 1.7353021 AU Incl. = 108.13790 The following ephemeris by the undersigned from the above orbital elements uses photometric power-law parameters H = 10.5 and 2.5n = 8.0 for the magnitudes. Date TT R. A. (2000) Decl. Delta r Elong. Phase Mag. 2022 01 21 12 01.66 -20 09.2 4.332 4.770 110.8 11.1 19.1 2022 01 31 11 57.29 -19 30.3 4.090 4.681 121.5 10.3 18.9 2022 02 10 11 51.14 -18 32.5 3.866 4.592 132.6 9.1 18.7 2022 02 20 11 43.29 -17 13.3 3.666 4.502 143.8 7.4 18.5 2022 03 02 11 33.98 -15 30.9 3.496 4.412 154.6 5.5 18.4 2022 03 12 11 23.61 -13 25.8 3.362 4.322 163.0 3.9 18.2 2022 03 22 11 12.76 -11 01.2 3.266 4.231 163.5 3.8 18.1 2022 04 01 11 02.05 -08 22.6 3.211 4.140 155.3 5.8 18.0 2022 04 11 10 52.12 -05 37.7 3.195 4.049 144.0 8.4 17.9 2022 04 21 10 43.51 -02 54.3 3.213 3.957 132.1 10.9 17.8 2022 05 01 10 36.56 -00 18.9 3.260 3.865 120.2 13.0 17.8 2022 05 11 10 31.49 +02 03.5 3.328 3.774 108.6 14.7 17.7 2022 05 21 10 28.34 +04 10.6 3.409 3.681 97.6 15.8 17.7 2022 05 31 10 27.04 +06 01.7 3.496 3.589 87.0 16.4 17.7 2022 06 10 10 27.48 +07 37.5 3.583 3.497 77.0 16.4 17.6 2022 06 20 10 29.51 +08 59.3 3.664 3.405 67.4 16.0 17.6 2022 06 30 10 32.95 +10 09.0 3.733 3.312 58.2 15.1 17.5 NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2022 CBAT 2022 February 1 (CBET 5093) Daniel W. E. Green