Electronic Telegram No. 5149 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 P/2022 L5 = P/2014 R5 = P/1998 W9 = P/2006 S14 (LEMMON-PANSTARRS) Comet P/2014 R5 (cf. CBET 3987) was accidentally recovered (and reported as a new object) on CCD images obtained with a 0.28-m f/2.2 Schmidt astrograph at San Pedro de Atacama, Chile, on 2022 June 7 by A. Maury and G. Attard; Maury notes that Attard posted the object to the Minor Planet Center's NEOCP webpage, whence it was apparently automatically identified with P/2014 R5 and removed (and inadvertently reported on MPEC 2022-M21 without confirming observations). As it was close to their limit, Maury adds that he cannot discern any cometary activity in their images. W. Hasubick, Buchloe, Germany, noticed the recovery on MPEC 2022-M21 and obtained follow-up CCD astrometry on July 2 with a 0.44-m f/4.6 reflector (again inadvertently published on MPEC 2022-N37 without attention drawn to the recovery); Hasubick also states that no cometary activity is visible in his images. Astrometry was also obtained from CCD images obtained on July 7 by J. L. Virlichie, P. Traverse, and H. Roy with a 0.35-m f/4.7 Newtonian reflector at Monte Patria, Chile, who measured magnitude 19.3 in an aperture of radius 6". The 2022 astrometry is tabulated below. 2022 UT R.A. (2000) Decl. Mag. Observer June 7.40262 22 55 30.80 - 7 07 35.5 20.0 Maury 7.40829 22 55 31.15 - 7 07 33.9 20.0 " 7.41388 22 55 31.51 - 7 07 32.2 19.9 " July 2.02813 23 19 08.81 - 4 53 54.2 19.7 Hasubick 2.03071 23 19 08.89 - 4 53 54.5 20.4 " 2.03329 23 19 08.94 - 4 53 54.3 20.0 " 7.42159 23 22 53.41 - 4 33 33.6 19.5 Virlichie 7.43051 23 22 53.76 - 4 33 31.6 19.1 " 7.43274 23 22 53.85 - 4 33 31.2 19.2 " S. Nakano (Central Bureau) noticed the first two nights of 2022 astrometry for P/2014 R5 on those two MPECs and then produced a linked orbit with the 2014 observations, from whence he identified a series of apparently asteroidal single-night observations in the MPC's "isolated tracklet file" from 1998 and 2006 that had not been previously linked. Observations from 1998 Nov. 22 and 2006 Oct. 15 and 23 were made with the 0.9-m f/3 Spacewatch reflector at Kitt Peak, while astrometry from 2006 Sept. 25 and Nov. 15 were made with the Mt. Lemmon Survey's 1.5-m reflector; the astrometry is provided below. Nakano notes that the residuals of the 2022 observations from the prediction in the ICQ's 2021 Comet Handbook and NK 3983 were +0.31 deg in R.A. and +0.12 deg in Decl., with a corresponding correction of Delta(T) = -0.99 day. 1998 UT R.A. (2000) Decl. Mag. Nov. 22.28397 3 41 50.05 +18 08 04.7 21.1 22.30708 3 41 48.93 +18 08 00.7 20.4 22.34829 3 41 47.20 +18 07 55.5 18.2 2006 UT R.A. (2000) Decl. Mag. Observer Sept.25.42365 2 58 34.78 +15 19 33.7 20.1 Mt. Lemmon 25.43032 2 58 34.71 +15 19 33.1 20.1 " 25.43714 2 58 34.57 +15 19 32.5 19.5 " 25.44380 2 58 34.46 +15 19 31.3 19.9 " Oct. 15.33041 2 49 46.70 +14 34 15.8 Spacewatch 15.34782 2 49 46.06 +14 34 12.1 " 15.36579 2 49 45.29 +14 34 08.9 " 23.31226 2 44 17.90 +14 08 17.6 20.7 " 23.32970 2 44 17.07 +14 08 13.8 20.4 " 23.34713 2 44 16.19 +14 08 10.9 20.2 " Nov. 15.25942 2 27 29.16 +12 51 16.7 19.9 Mt. Lemmon 15.26718 2 27 28.80 +12 51 16.5 19.6 " 15.27502 2 27 28.58 +12 51 14.9 19.6 " 15.28299 2 27 28.22 +12 51 12.6 20.2 " The residuals for the 1998 observations were about 43" from a linked, purely gravitational 2014-2022 orbit by Nakano, and the corresponding residuals for the 2006 observations were about 18". The four apparitions cannot be represented well by a gravitational solution alone (and a traditional non-gravitational solution assuming water-ice sublimation leads to a large value of A1). The following linked orbital elements by Nakano are from 132 observations spanning 1998-2022 (mean residual 0".5), with non-gravitational parameters Y1 = -0.39 +/- 0.40 and Y2 = -0.0118 +/- 0.0026 using Yabushita's theory (1996, MN 283, 347), assuming the sublimating molecule too be CO (or N_2). No close approaches to major planets were found. Epoch = 1998 Jan. 27.0 TT T = 1998 Jan. 30.32063 TT Peri. = 214.00492 e = 0.4134261 Node = 126.38469 2000.0 q = 2.3873870 AU Incl. = 1.08526 a = 4.0700534 AU n = 0.12003390 P = 8.21 years Epoch = 2006 Apr. 15.0 TT T = 2006 Apr. 5.05621 TT Peri. = 213.83319 e = 0.4137037 Node = 126.45820 2000.0 q = 2.3802828 AU Incl. = 1.08569 a = 4.0598636 AU n = 0.12048609 P = 8.18 years Epoch = 2014 July 2.0 TT T = 2014 June 17.58594 TT Peri. = 213.87614 e = 0.4127512 Node = 126.54501 2000.0 q = 2.3863022 AU Incl. = 1.08823 a = 4.0635286 AU n = 0.12032312 P = 8.19 years Epoch = 2022 Aug. 9.0 TT T = 2022 Aug. 17.80521 TT Peri. = 213.72910 e = 0.4142362 Node = 126.56788 2000.0 q = 2.3781221 AU Incl. = 1.08845 a = 4.0598654 AU n = 0.12048601 P = 8.18 years Epoch = 2030 Sept.16.0 TT T = 2030 Sept.22.85848 TT Peri. = 213.54269 e = 0.4235138 Node = 127.11378 2000.0 q = 2.3043164 AU Incl. = 1.09506 a = 3.9971754 AU n = 0.12333157 P = 7.99 years Epoch = 2038 Sept.14.0 TT T = 2038 Sept.27.94709 TT Peri. = 213.59174 e = 0.4231437 Node = 127.11062 2000.0 q = 2.3107344 AU Incl. = 1.09604 a = 4.0057366 AU n = 0.12293640 P = 8.02 years The following ephemeris by the undersigned from the above orbital elements uses photometric power-law parameters H = 14.0 and 2.5n = 10 for the magnitudes. Date TT R. A. (2000) Decl. Delta r Elong. Phase Mag. 2022 06 30 23 17.59 -05 02.4 1.863 2.404 109.6 23.5 19.2 2022 07 10 23 24.47 -04 25.3 1.751 2.394 117.3 22.2 19.0 2022 07 20 23 29.25 -04 02.0 1.648 2.387 125.6 20.2 18.9 2022 07 30 23 31.70 -03 54.1 1.557 2.382 134.6 17.7 18.7 2022 08 09 23 31.72 -04 02.0 1.482 2.379 144.2 14.4 18.6 2022 08 19 23 29.44 -04 24.5 1.425 2.378 154.4 10.6 18.5 2022 08 29 23 25.21 -04 58.9 1.389 2.379 165.3 6.2 18.5 2022 09 08 23 19.75 -05 39.7 1.377 2.383 176.3 1.6 18.5 2022 09 18 23 14.01 -06 20.5 1.389 2.389 172.1 3.3 18.5 2022 09 28 23 08.95 -06 55.0 1.427 2.396 161.0 7.8 18.6 2022 10 08 23 05.46 -07 17.8 1.487 2.406 150.2 11.9 18.7 2022 10 18 23 04.10 -07 25.8 1.569 2.418 140.0 15.4 18.8 2022 10 28 23 05.12 -07 17.9 1.668 2.432 130.3 18.2 19.0 2022 11 07 23 08.55 -06 54.2 1.782 2.448 121.2 20.3 19.1 2022 11 17 23 14.19 -06 16.1 1.909 2.465 112.7 21.7 19.3 2022 11 27 23 21.78 -05 25.2 2.044 2.485 104.7 22.6 19.5 2022 12 07 23 31.05 -04 23.1 2.186 2.506 97.1 23.0 19.7 2022 12 17 23 41.71 -03 11.6 2.332 2.529 89.8 22.9 19.9 2022 12 27 23 53.51 -01 52.4 2.481 2.553 82.9 22.5 20.0 2023 01 06 00 06.25 -00 27.1 2.630 2.579 76.2 21.7 20.2 2023 01 16 00 19.74 +01 02.7 2.778 2.606 69.7 20.7 20.4 2023 01 26 00 33.84 +02 35.7 2.924 2.634 63.4 19.5 20.5 2023 02 05 00 48.45 +04 10.6 3.066 2.664 57.2 18.1 20.7 2023 02 15 01 03.45 +05 46.1 3.202 2.694 51.1 16.6 20.8 2023 02 25 01 18.77 +07 21.1 3.332 2.726 45.2 14.9 21.0 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 5149) Daniel W. E. Green