Electronic Telegram No. 5147 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 N1 (ATTARD-MAURY) Alain Maury reports that Georges Attard (Mougins, France) and he have discovered another comet on images obtained with a 0.28-m f/2.2 Schmidt reflector (the first three observations tabulated below) and a 40-cm reflector at San Pedro de Atacama, Chile (the last three observations tabulated elow) on July 2, with the object described as having a coma of size 5".2 (full-width-at-half-maximum) in 3".1 seeing. 2022 UT R.A. (2000) Decl. Mag. Observer July 2.32220 22 38 39.68 -11 45 46.5 17.2 Maury 2.32787 22 38 38.10 -11 45 50.4 18.4 " 2.33355 22 38 36.42 -11 45 55.9 18.1 " 2.40167 22 38 17.07 -11 47 00.8 20.0 " 2.40684 22 38 15.55 -11 47 06.2 18.5 " 2.41201 22 38 13.99 -11 47 11.6 18.8 " After the comet was posted on the Minor Planet Center's PCCP webpage, other CCD astrometrists reported cometary appearance. R. Weryk, Department of Physics and Astronomy, University of Western Ontario, identified three 45-s pre-discovery w-band survey images taken on June 29.6 UT with the Pan-STARRS2 1.8-m Ritchey-Chretien reflector at Haleakala, which show a condensed head of size 2".2 (FWHM) in 1".4 seeing with a broad tail about 4" long spanning p.a. 240-270 degrees. Twenty-four stacked images taken remotely by H. Sato (Tokyo, Japan) on July 3.4 with a 0.43-m f/6.8 astrograph located at Mayhill, NM, USA, show a strongly condensed coma 10" in diameter with a fan-like tail 15" long toward p.a. 220-300 degrees; the magnitude was 18.8 as measured within a circular aperture of radius 5".7. Nine 60-s unfiltered exposures taken on July 5.1 by F. Kugel at Dauban, France, with a 0.4-m f/2.8 reflector show a coma of diameter about 10" with a possible curved tail 10" long in p.a. about 220 degrees; the magnitude was 18.8 in an aperture of radius 5".8. E. Guido, Castellammare di Stabia, Italy, writes that sixty-seven stacked 30-s unfiltered exposures taken remotely by a large group of observers on July 6.3 using a "Telescope Live" 0.61-m f/6.5 astrograph at El Sauce, Chile, show a compact coma about 10" in diameter of magnitude 18.3-18.8. The available astrometry appears on MPEC 2022-N47. The following parabolic orbital elements by S. Nakano (Central Bureau) are from 86 observations spanning June 29-July 7 (mean residual 0".6). T = 2022 Sept. 8.60001 TT Peri. = 40.26141 Node = 301.89272 2000.0 q = 1.4884680 AU Incl. = 164.81499 The following ephemeris by the undersigned from the above orbital elements uses photometric power-law parameters H = 16.0 and 2.5n = 8 for the magnitudes. Date TT R. A. (2000) Decl. Delta r Elong. Phase Mag. 2022 06 30 22 48.73 -11 10.9 1.056 1.782 118.5 30.1 18.1 2022 07 05 22 24.88 -12 31.8 0.915 1.745 129.2 26.8 17.7 2022 07 10 21 51.29 -14 13.3 0.790 1.711 142.3 21.3 17.4 2022 07 15 21 04.88 -16 04.6 0.691 1.678 158.3 13.0 17.0 2022 07 20 20 04.95 -17 32.6 0.633 1.648 176.2 2.4 16.7 2022 07 25 18 57.63 -17 52.1 0.624 1.620 161.4 11.6 16.7 2022 07 30 17 54.76 -16 53.4 0.667 1.594 141.7 23.2 16.7 2022 08 04 17 04.53 -15 14.4 0.751 1.570 124.8 32.0 16.9 2022 08 09 16 27.62 -13 33.8 0.863 1.549 111.0 37.7 17.2 2022 08 14 16 01.17 -12 08.1 0.991 1.531 99.7 40.7 17.5 2022 08 19 15 42.15 -10 59.8 1.127 1.516 90.1 41.9 17.7 2022 08 24 15 28.29 -10 06.7 1.267 1.505 81.8 41.7 17.9 2022 08 29 15 18.05 -09 25.5 1.407 1.496 74.5 40.6 18.1 2022 09 03 15 10.39 -08 53.3 1.544 1.491 67.7 38.8 18.3 2022 09 08 15 04.62 -08 27.9 1.678 1.488 61.5 36.5 18.5 2022 09 13 15 00.24 -08 07.6 1.807 1.490 55.5 33.9 18.7 2022 09 18 14 56.93 -07 51.2 1.929 1.494 49.9 31.0 18.8 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 5147) Daniel W. E. Green