Electronic Telegram No. 5184 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 R6 (PANSTARRS) R. Weryk, Department of Physics and Astronomy, University of Western Ontario, reports the discovery of another comet in images obtained with the Pan-STARRS2 1.8-m Ritchey-Chretien reflector at Haleakala (discovery observations tabulated below). 2022 UT R.A. (2000) Decl. Mag. Sept.14.57399 3 40 41.81 -39 24 59.3 20.0 14.58292 3 40 41.81 -39 25 02.1 20.0 14.59181 3 40 41.80 -39 25 04.7 20.3 Weryk and R. Wainscoat obtained three 60-s gri-band follow-up images on Sept. 27.5 UT with the 3.6-m Canada-France-Hawaii Telescope at Mauna Kea (queue observer C. Wipper; coordinator E. Bertin), in which all the point- spread-function displays are elongated (including stars), but the object's PSF appears more asymmetric due to a possible short tail (1" long in p.a. 320 degrees); the condensed coma measured perpendicular to the elongated images is only 1".3 (full-width-at-half-maximum in 0".7 seeing. Three additional 60-s gri-band CFHT images taken on Oct. 29.6 (queue observer A. Acohido) show the object to appear soft with respect to nearby field stars, with a condensed head of size 1".8 (FWHM) in seeing of about 1".3; the PSF appears asymmetric toward p.a. 350 degrees and is suggestive of a tail about 1" long. The object was posted on the Minor Planet Center's PCCP webpage. Eight stacked 120-s CCD exposures taken remotely by H. Sato (Bunkyo-ku, Tokyo, Japan) on Sept. 24.39 with a 0.51-m f/6.8 astrograph located at Rio Hurtado, Chile, show only a stellar appearance; the magnitude was 19.6 as measured within a circular aperture of radius 2".9. The available astrometry appears on MPEC 2022-V1. The following parabolic orbital elements by S. Nakano (Central Bureau) are from 56 observations spanning Sept. 14-Oct. 29 (mean residual 0".3). T = 2025 Aug. 26.73271 TT Peri. = 319.77126 Node = 150.77015 2000.0 q = 6.5797969 AU Incl. = 57.02445 The following ephemeris by the undersigned from the above orbital elements uses photometric power-law parameters H = 7.0 and 2.5n = 8 for the magnitudes. Date TT R. A. (2000) Decl. Delta r Elong. Phase Mag. 2022 09 18 03 40.63 -39 42.6 9.101 9.555 114.1 5.5 19.6 2022 09 28 03 39.89 -40 32.3 9.009 9.512 117.4 5.4 19.6 2022 10 08 03 38.33 -41 18.0 8.932 9.468 119.7 5.3 19.6 2022 10 18 03 36.04 -41 57.7 8.871 9.424 121.1 5.2 19.5 2022 10 28 03 33.14 -42 29.9 8.827 9.381 121.2 5.2 19.5 2022 11 07 03 29.80 -42 52.8 8.800 9.337 120.2 5.3 19.5 2022 11 17 03 26.23 -43 05.6 8.788 9.294 118.1 5.4 19.5 2022 11 27 03 22.63 -43 07.6 8.792 9.251 114.9 5.6 19.4 2022 12 07 03 19.27 -42 58.6 8.809 9.208 111.0 5.7 19.4 2022 12 17 03 16.33 -42 39.3 8.837 9.166 106.5 5.9 19.4 2022 12 27 03 14.02 -42 10.5 8.876 9.123 101.5 6.1 19.4 2023 01 06 03 12.47 -41 33.3 8.921 9.080 96.3 6.2 19.4 2023 01 16 03 11.77 -40 49.5 8.970 9.038 90.8 6.2 19.4 2023 01 26 03 11.98 -40 00.4 9.021 8.996 85.4 6.3 19.4 2023 02 05 03 13.10 -39 07.7 9.072 8.954 80.1 6.2 19.4 2023 02 15 03 15.11 -38 13.1 9.119 8.912 74.9 6.1 19.4 2023 02 25 03 17.97 -37 17.8 9.161 8.871 70.0 6.0 19.4 2023 03 07 03 21.62 -36 23.3 9.196 8.829 65.4 5.9 19.4 2023 03 17 03 25.97 -35 30.8 9.222 8.788 61.3 5.7 19.4 2023 03 27 03 30.94 -34 41.2 9.238 8.747 57.8 5.5 19.4 2023 04 06 03 36.47 -33 55.4 9.243 8.706 54.9 5.4 19.3 NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2022 CBAT 2022 November 1 (CBET 5184) Daniel W. E. Green