Electronic Telegram No. 5148 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 N2 (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, Hawaii, on July 4; he identified it with Pan-STARRS2 images from June 10 that were in the Minor Planet Center's "isolated tracklet file", along with numerous additional Pan-STARRS2 images going back to June 2 that were not in the MPC's file (astrometry tabulated below). Four 45-s w-band survey images from July 4 show a condensed coma of size 2".0 (full-width-at-half-maximum in 1".6 seeing with a 3" tail in p.a. 260 degrees. Four 45-s w-band survey images from June 2 in 1".1 seeing show a condensed head of size 1".4-1".5, again with a straight 3" tail in p.a. 260 degrees. 2022 UT R.A. (2000) Decl. Mag. June 2.49810 19 59 33.71 -23 20 26.7 21.3 2.50830 19 59 33.60 -23 20 27.2 21.3 2.51849 19 59 33.48 -23 20 27.5 20.8 2.52867 19 59 33.38 -23 20 27.9 21.2 7.57253 19 58 35.75 -23 23 23.5 21.0 7.57968 19 58 35.70 -23 23 23.7 20.9 7.58682 19 58 35.56 -23 23 24.1 20.8 7.59393 19 58 35.49 -23 23 24.2 21.2 10.53884 19 57 57.62 -23 25 15.2 21.0 10.55977 19 57 57.35 -23 25 15.7 20.9 10.56997 19 57 57.22 -23 25 16.4 20.9 July 4.44645 19 51 14.15 -23 42 34.0 20.6 4.45479 19 51 13.95 -23 42 34.4 20.8 4.46308 19 51 13.78 -23 42 34.6 21.1 The available astrometry appears on MPEC 2022-N48. The following parabolic orbital elements by S. Nakano (Central Bureau) are from 23 observations spanning June 2-July 6 (mean residual 0".1). T = 2025 Aug. 3.51126 TT Peri. = 75.27415 Node = 319.77072 2000.0 q = 3.8402167 AU Incl. = 5.49515 The following ephemeris by the undersigned from the above orbital elements uses photometric power-law parameters H = 7.5 and 2.5n = 8 for the magnitudes. Date TT R. A. (2000) Decl. Delta r Elong. Phase Mag. 2022 06 30 19 52.66 -23 39.2 8.591 9.564 162.1 1.9 20.0 2022 07 10 19 49.38 -23 46.7 8.495 9.503 172.1 0.8 20.0 2022 07 20 19 45.91 -23 53.9 8.428 9.442 176.1 0.4 19.9 2022 07 30 19 42.42 -24 00.2 8.391 9.381 166.5 1.4 19.9 2022 08 09 19 39.10 -24 05.3 8.383 9.320 156.3 2.5 19.9 2022 08 19 19 36.11 -24 08.9 8.402 9.259 146.0 3.5 19.9 2022 08 29 19 33.61 -24 10.8 8.446 9.198 135.9 4.4 19.8 2022 09 08 19 31.72 -24 10.9 8.511 9.136 125.8 5.1 19.8 2022 09 18 19 30.54 -24 09.3 8.593 9.075 115.8 5.7 19.8 2022 09 28 19 30.13 -24 05.8 8.687 9.014 105.9 6.1 19.8 2022 10 08 19 30.53 -24 00.6 8.789 8.952 96.2 6.4 19.8 2022 10 18 19 31.73 -23 53.7 8.894 8.891 86.6 6.4 19.8 2022 10 28 19 33.72 -23 45.2 8.997 8.829 77.1 6.3 19.8 2022 11 07 19 36.45 -23 35.1 9.094 8.768 67.8 6.0 19.8 2022 11 17 19 39.87 -23 23.4 9.181 8.706 58.5 5.6 19.8 2022 11 27 19 43.90 -23 10.2 9.254 8.644 49.4 5.0 19.8 2022 12 07 19 48.47 -22 55.5 9.310 8.583 40.3 4.3 19.8 NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2022 CBAT 2022 July 8 (CBET 5148) Daniel W. E. Green