Nakano Note (Nakano wa Kangaeru noda) NK 4889 P/2022 O2 (PANSTARRS)

The following improved orbital elements, by S. Nakano, are from 68 observations 2022 June 9 to Dec. 5. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.40 arc second. See the previous orbits in CBET 5160 and NK 4847. Epoch = 2023 Jan. 16.0 TT T = 2023 Jan. 7.09252 +/- 0.00023 (m.e.) TT Peri. = 48.63533 +/- 0.00024 Node = 330.49669 +/- 0.00009 (2000.0) Inc. = 9.42448 +/- 0.00005 q = 1.7568276 +/- 0.0000065 AU e = 0.7217707 +/- 0.0000134 a = 6.3143145 +/- 0.0003048 AU n' = 0.06211761 +/- 0.00000450 P = 15.867 +/- 0.0011490 years (+/- 0.42 day) The predicted orbit for the 2038 return is as follows: T = 2038 Oct. 7.55600 TT Epoch = 2038 Oct. 24.0 TT Peri. = 48.68929 e = 0.7214473 Node = 330.37980 (2000.0) a = 6.2681883 AU Inc. = 9.41910 n'= 0.06280454 q = 1.7460209 AU P = 15.693 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2022/ 220822 F51 0.1+ 0.0 221020 Q11 0.3+ 0.4+ 220609 F52 0.5+ 0.4+ 220822 F51 0.0 0.1+ 221024 F51 0.4- 0.2- 220705 F52 0.3+ 0.4- 220824 Q62 0.4+ 0.5- 221024 F51 0.3- 0.2- 220705 F52 0.2+ 0.3- 220824 Q62 0.6+ 0.5- 221024 F51 0.3- 0.2- 220705 F52 0.1- 0.3- 220824 215 0.5- 0.1- 221026 215 0.2+ 0.1- 220705 F52 0.0 0.0 220824 215 0.2- 0.6+ 221026 215 0.4+ 0.2+ 220721 F52 0.2- 0.0 220824 215 0.1- 1.5+ 221026 215 0.6+ 0.5+ 220721 F52 0.2- 0.2+ 220826 Q62 0.2- 0.2- 221118 Q11 0.6- 0.1+ 220721 F52 0.4- 0.1- 220826 Q62 0.3- 0.2- 221118 Q11 0.6- 0.0 220723 F52 0.0 0.2- 220829 X03 0.7+ 1.0+ 221118 Q11 0.4- 0.0 220723 F52 0.2+ 0.1- 220829 X03 0.1+ 0.6+ 221119 703 1.7+ 0.0 220801 F52 0.2- 0.1+ 220829 X03 0.3+ 0.6+ 221119 703 1.2- 0.2- 220801 F52 0.2- 0.0 220920 F51 0.1+ 0.0 221119 703 (2.8- 0.3-) 220801 F52 0.1- 0.0 220920 F51 0.0 0.1- 221121 G96 0.2- 0.1- 220817 F52 0.2+ 0.2+ 220920 F51 0.0 0.1- 221121 G96 0.2- 0.0 220817 F52 0.1- 0.2+ 220920 F51 0.1+ 0.0 221121 G96 0.1- 0.4- 220817 F52 0.0 0.0 220925 F52 0.1+ 0.1+ 221121 G96 0.0 0.0 220817 F52 0.0 0.0 220925 F52 0.0 0.1+ 221122 703 1.5+ 0.3- 220817 M21 0.2+ 0.2- 220925 F52 0.1+ 0.0 221122 703 0.0 1.0+ 220817 M21 0.3+ 0.2+ 220925 F52 0.1+ 0.1+ 221122 703 0.9- 0.1- 220818 568 0.0 0.0 221020 W76 0.2- 0.1+ 221205 A77 0.0 0.4+ 220818 568 0.0 0.0 221020 W76 0.0 0.3- 221205 A77 0.6+ 0.4+ 220818 568 0.0 0.0 221020 Q11 0.6+ 0.4+ 220822 F51 0.2- 0.1+ 221020 Q11 0.5+ 0.5+ ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2022 Dec. 12

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