Nakano Note (Nakano wa Kangaeru noda) NK 4939 P/Jahn (2023 C1 = 2016 C3)
The following improved orbital elements, by S. Nakano, are from 60 observations 2013 to 2023. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.39 arc second. See a linked orbit in CBET 5237 (same orbit). Epoch = 2022 Oct. 28.0 TT T = 2022 Oct. 30.05417 +/- 0.00036 (m.e.) TT Peri. = 104.77697 +/- 0.00009 Node = 1.58581 +/- 0.00004 (2000.0) Inc. = 13.62910 +/- 0.00002 q = 2.6341363 +/- 0.0000007 AU e = 0.3166054 +/- 0.0000001 a = 3.8544883 +/- 0.0000013 AU n' = 0.13024288 +/- 0.00000007 P = 7.567 +/- 0.0000038 years T = 2015 Mar. 29.42896 TT Epoch = 2015 Apr. 8.0 TT Peri. = 104.97186 e = 0.3107893 Node = 1.86031 (2000.0) a = 3.8778042 AU Inc. = 13.58997 n'= 0.12906999 q = 2.6726243 AU P = 7.636 years The predicted orbit for the 2030 return is as follows: T = 2030 June 2.50117 TT Epoch = 2030 May 19.0 TT Peri. = 105.04613 e = 0.3159926 Node = 1.50564 (2000.0) a = 3.8597781 AU Inc. = 13.62099 n'= 0.12997522 q = 2.6401169 AU P = 7.583 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2013/ 160410 W84 0.2+ 0.2- 230125 K88 0.6- 0.2- 131122 W84 0.4- 0.2- 160410 F51 0.4- 0.0 230125 K88 1.0- 0.6+ 131123 W84 0.1+ 0.2- 160410 F51 0.3- 0.1- 230201 G96 0.1+ 0.5- 2014/ 160410 F51 0.5- 0.4+ 230201 G96 0.5- 0.0 141213 F51 0.2- 0.4+ 2021/ 230201 G96 0.6- 0.2+ 141213 F51 0.0 0.5+ 210930 F51 0.0 0.2- 230201 G96 0.1- 0.1- 141213 F51 0.3- 0.5+ 210930 F51 0.3+ 0.2+ 230213 G96 0.6- 0.1- 2016/ 210930 F51 0.4- 0.0 230213 G96 0.5- 0.2- 160210 F51 0.4+ 0.2- 211011 F51 0.1+ 0.1+ 230214 C95 0.0 0.0 160310 F51 0.1- 0.1- 211011 F51 0.1+ 0.1- 230214 C95 0.2+ 0.3- 160310 F51 0.0 0.1- 211011 F51 0.1+ 0.2- 230214 C95 0.0 0.4- 160310 F51 0.0 0.1- 2022/ 230215 C95 0.2- 0.3+ 160310 F51 0.2+ 0.1+ 221127 G96 0.1+ 0.6+ 230215 C95 0.2- 1.2+ 160313 F51 0.0 0.0 221127 G96 0.1- 0.3+ 230215 C95 0.4- 1.0+ 160401 F51 0.0 0.1+ 221127 G96 0.2- 0.3- 230215 C95 0.4- 0.7+ 160401 F51 0.1+ 0.1- 221202 F52 0.3+ 0.0 230318 G96 0.1+ 1.0- 160401 F51 0.1- 0.1+ 221202 F52 0.6+ 0.0 230318 G96 1.0+ 0.7- 160401 F51 0.0 0.1- 221202 F52 0.5+ 0.0 230318 G96 1.0+ 0.3- 160402 F51 0.6+ 0.3- 221202 F52 0.3+ 0.0 230318 G96 0.4+ 0.4- 160402 F51 0.4+ 0.3+ 2023/ 230321 106 (3.4+ 1.9-) 160402 F51 0.0 0.3+ 230119 D29 0.2+ 0.3- 230321 106 0.5+ 0.9- 160402 F51 0.2- 0.3- 230119 D29 0.8- 0.1+ 160409 W84 0.3- 0.3- 230119 D29 0.4- 0.1+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2023 Mar. 24