Nakano Note (Nakano wa Kangaeru noda) NK 4280 326P/Hill

The following improved orbital elements, by T. Kobayashi, are from 182 observations 1990 to 2017. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.64 arc second. See the previous orbits in NK 1574 (= HICQ 2014) and NK 2993 (= HICQ 2016). Epoch = 2015 Oct. 25.0 TT T = 2015 Oct. 22.73518 +/- 0.00140 (m.e.) TT Peri. = 278.84926 +/- 0.00074 Node = 99.81303 +/- 0.00067 (2000.0) Inc. = 2.47048 +/- 0.00001 q = 2.7796688 +/- 0.0000020 AU e = 0.3173112 +/- 0.0000005 a = 4.0716485 +/- 0.0000043 AU n' = 0.11996337 +/- 0.00000019 P = 8.216 +/- 0.0000130 years T = 1991 Mar. 20.80392 TT Epoch = 1991 Mar. 5.0 TT Peri. = 279.58307 e = 0.3190436 Node = 100.01714 (2000.0) a = 4.0600197 AU Inc. = 2.47144 n'= 0.12047914 q = 2.7646966 AU P = 8.181 years [ T = 1999 May 24.06437 TT Epoch = 1999 May 22.0 TT Peri. = 279.05720 e = 0.3179899 Node = 99.91537 (2000.0) a = 4.0816512 AU Inc. = 2.46884 n'= 0.11952266 q = 2.7837273 AU P = 8.246 years ] T = 2007 July 30.84306 TT Epoch = 2007 Aug. 8.0 TT Peri. = 278.51608 e = 0.3177134 Node = 99.86081 (2000.0) a = 4.0670867 AU Inc. = 2.47096 n'= 0.12016526 q = 2.7749188 AU P = 8.202 years The predicted orbit for the 2023 return is as follows: T = 2023 Dec. 30.33738 TT Epoch = 2024 Jan. 11.0 TT Peri. = 278.62619 e = 0.3191538 Node = 99.79691 (2000.0) a = 4.0679918 AU Inc. = 2.47103 n'= 0.12012516 q = 2.7696766 AU P = 8.205 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1990/ 071205 561 (0.5+ 2.5+) 151011 G45 0.1- 0.1- 900924 260 0.1- 0.0 071208 J47 0.8+ 0.3+ 151011 G45 0.2+ 0.3+ 900924 260 1.6+ 0.4+ 071208 J47 0.8+ 0.1+ 151011 G45 0.1- 0.2+ 2007/ 071208 J47 0.5+ 0.2- 151011 G45 0.2- 0.1- 071014 691 0.2- 0.3- 071230 204 0.2- 0.1+ 151011 G45 0.6- 0.0 071014 691 0.8- 0.3- 2008/ 151011 G45 1.3+ 0.5+ 071014 691 1.8- 0.2+ 080210 G96 1.6+ 0.2+ 151013 703 0.7+ 0.4+ 071109 G96 0.5+ 0.3- 080210 G96 1.4+ 0.2- 151013 703 1.4- 1.1- 071109 G96 0.2- 0.2+ 080210 G96 1.3+ 0.3- 151013 703 1.4- 0.7- 071109 G96 0.4+ 0.1+ 080210 G96 1.2+ 0.1+ 151013 703 2.2- 0.3- 071109 G96 0.3+ 0.2- 2015/ 151017 G45 0.3- 0.5+ 071109 G96 0.2- 0.2- 150808 461 1.2- 0.1- 151017 G45 0.7+ 0.3+ 071109 G96 0.1- 0.1- 150808 461 0.7- 0.2+ 151017 G45 0.4- 0.1- 071109 G96 0.1- 0.3- 150808 461 1.1- 0.6- 151017 G45 0.9+ 0.0 071109 G96 0.4+ 0.3- 150809 461 0.9- 0.2+ 151017 G45 0.7- 0.9- 071109 G96 0.6+ 0.4- 150809 461 0.3- 0.1+ 151017 G45 0.2+ 0.2- 071109 235 0.8- 0.7- 150809 461 0.2- 0.1+ 151018 D29 0.3- 0.2- 071109 235 0.6+ 0.1- 150818 291 0.3- 0.0 151018 D29 0.1- 0.8- 071109 473 0.4- 1.9- 150818 291 0.2- 0.1+ 151018 D29 0.3- 0.2- 071109 473 (0.5- 2.9-) 150818 291 0.2+ 0.0 151019 G45 0.2+ 0.6- 071109 147 (2.9- 1.7-) 150821 A77 0.3- 0.1+ 151019 G45 0.2+ 0.3+ 071110 147 2.0- 1.6- 150821 A77 0.2- 0.0 151019 G45 0.5+ 0.4+ 071110 147 1.5- 1.4- 150821 A77 0.0 0.0 151019 G45 0.5+ 0.0 071110 H55 0.3+ 0.1+ 150823 W96 1.7- 0.8+ 151019 G45 0.3+ 0.9+ 071110 H55 0.2+ 0.2+ 150823 W96 0.1- 0.9- 151019 G45 0.5+ 0.2+ 071110 H55 0.2+ 0.1+ 150825 W96 0.5- 0.3+ 151019 F51 0.5+ 0.1+ 071110 673 0.2- 0.1+ 150825 W96 0.9- 0.9- 151019 F51 0.5+ 0.2+ 071110 673 1.6+ 0.2+ 150826 215 0.4- 0.3- 151019 F51 0.4+ 0.0 071110 G96 0.8- 0.2+ 150826 215 0.1- 0.5- 151023 F51 0.4+ 0.3+ 071110 G96 0.2- 0.3+ 150826 215 0.1+ 0.7- 151023 F51 0.3+ 0.3+ 071110 673 0.6- 0.2+ 150907 D29 0.5+ 0.1+ 151023 F51 0.3+ 0.3+ 071110 G96 0.3+ 0.3+ 150907 D29 1.0- 0.5- 151029 F51 0.4+ 0.0 071110 G96 0.7- 0.1+ 150907 D29 0.6- 0.5- 151029 F51 0.6+ 0.2+ 071110 673 0.8+ 0.8+ 150911 F51 0.3+ 0.1+ 151029 F51 0.5+ 0.2+ 071110 711 0.2- 0.4+ 150911 F51 0.1+ 0.1+ 151029 F51 0.6+ 0.5+ 071110 711 0.8+ 0.0 150911 F51 0.1+ 0.1+ 151101 F51 0.5+ 0.3+ 071110 711 0.0 0.1- 150911 F51 0.2+ 0.0 151101 F51 0.5+ 0.2+ 071110 474 0.1- 0.0 150912 F51 0.2+ 0.1+ 151101 F51 0.5+ 0.3+ 071110 474 0.1- 0.1- 150912 F51 0.0 0.0 151101 F51 0.7+ 0.3+ 071110 474 0.6+ 0.4- 150912 F51 0.0 0.2+ 151102 G45 0.1+ 0.1- 071110 213 0.7- 0.1+ 150912 F51 0.1+ 0.1+ 151102 G45 0.7+ 0.7+ 071110 213 0.9- 0.4+ 150918 703 0.3- 0.8+ 151102 G45 0.8+ 0.7+ 071110 213 0.6- 0.5+ 150918 703 1.5- 0.4- 151102 G45 0.2+ 0.7+ 071110 J47 1.7- 2.4+ 150918 703 0.6- 0.0 151102 G45 0.8+ 0.1+ 071110 J47 (2.2- 2.5+) 150924 703 1.2- 1.0- 151102 G45 0.9+ 0.3+ 071111 J47 0.9- 0.6+ 150924 703 1.6- 0.5- 151102 G45 0.6+ 0.5+ 071111 J47 0.9- 0.7+ 150924 703 0.8- 1.3- 151102 G45 0.4+ 0.6- 071111 349 0.1+ 0.3- 151003 A71 0.7+ 0.2- 151105 130 0.5+ 0.3- 071111 349 0.6+ 0.0 151003 A71 0.5+ 0.1- 151105 130 1.6+ 0.2+ 071111 349 0.6+ 0.0 151005 D29 0.9- 0.2- 151107 F51 0.3+ 0.5+ 071114 704 0.7+ 0.6+ 151005 D29 0.1- 0.7- 151107 F51 0.8+ 0.2+ 071114 704 0.9- 0.3+ 151005 D29 0.2+ 1.2- 151107 F51 0.3+ 0.3+ 071114 704 0.2- 0.6+ 151008 703 0.3- 1.0- 151108 F51 0.8+ 0.1+ 071114 704 1.5- 0.1- 151008 703 1.0- 0.6- 151108 F51 1.0+ 0.2+ 071116 850 0.2+ 0.7- 151008 703 (3.3- 0.1+) 151108 F51 0.4+ 0.3+ 071116 850 0.1- 0.7- 151010 G45 0.1+ 0.5+ 151231 F51 1.6+ 0.6+ 071116 204 0.6+ 0.2+ 151010 G45 0.2- 0.7+ 151231 F51 1.7+ 0.8+ 071117 204 0.8- 0.5+ 151010 G45 0.3+ 0.7+ 151231 F51 1.5+ 0.5+ 071118 213 0.2- 0.2- 151010 G45 0.2- 0.1- 151231 F51 1.5+ 0.9+ 071118 213 0.1- 0.0 151010 G45 0.2+ 0.7- 2017/ 071118 213 0.1+ 0.4+ 151010 G45 0.5- 0.7- 170127 F51 0.7+ 0.4- 071128 215 0.5+ 0.0 151010 G45 0.2- 0.5+ 170127 F51 0.2+ 0.1+ 071205 561 0.9+ 0.1- 151010 G45 1.4- 0.3- 170127 F51 0.2+ 0.0 071205 561 0.2+ 0.1- 151011 G45 0.1- 0.7+ 170127 F51 0.6- 0.7+ ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2020 Dec. 23

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