Nakano Note (Nakano wa Kangaeru noda) NK 4123 A/2019 T2
The following improved orbital elements, by S. Nakano, are from 80 observations 2019 Aug. 26 to 2020 June 1. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.49 arc second. The comet will pass 2.87 AU from Jupiter on 2020 Nov. 29 UT. See the previous orbit in NK 4023 (= HICQ 2020). Epoch = 2021 Apr. 16.0 TT T = 2021 Apr. 22.29675 +/- 0.00678 (m.e.) TT Peri. = 239.38669 +/- 0.00072 Node = 155.64300 +/- 0.00021 (2000.0) Inc. = 111.48871 +/- 0.00027 q = 2.6460582 +/- 0.0000569 AU e = 0.9985545 +/- 0.0000212 1/a = +0.0005463 +/- 0.0000080 1/AU origin = +0.000781 (Q= 7) future = +0.000798 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2019/ 191009 Z84 0.1+ 0.0 191229 215 0.0 0.0 190826 G96 0.3+ 0.5- 191020 H06 0.0 0.3+ 2020/ 190826 G96 0.5+ 0.4- 191020 H06 0.2+ 0.3+ 200520 T08 0.5- 0.0 190826 G96 0.3+ 0.4- 191020 H06 0.0 0.1+ 200520 T08 0.7- 0.1+ 190826 G96 0.2- 0.1- 191023 G96 0.3+ 0.2+ 200520 T08 0.8- 0.4+ 190910 F51 0.3+ 0.1+ 191023 G96 0.0 0.3- 200520 T08 1.4- 0.7+ 190910 F51 0.0 0.3- 191023 G96 0.1- 0.1- 200521 568 0.8+ 0.2- 190910 F51 0.1- 0.2- 191023 G96 0.2- 0.1+ 200521 568 0.8+ 0.1- 190912 F51 0.2- 0.5+ 191023 461 0.0 0.6+ 200524 Q11 0.2- 0.2+ 190912 F51 0.3+ 0.1- 191023 461 0.1- 0.2+ 200524 Q11 0.2- 0.2+ 190912 F51 0.4- 0.1+ 191023 461 0.2+ 0.4+ 200524 Q11 0.3- 0.2+ 190919 G96 0.1+ 0.6- 191029 568 0.1- 0.0 200526 186 0.5+ 1.6+ 190919 G96 0.2+ 0.0 191029 568 0.1- 0.0 200526 186 0.8- 1.3- 190919 G96 0.1+ 0.1- 191029 568 0.1- 0.0 200526 186 1.9- 1.9+ 190919 G96 0.1- 0.0 191029 C95 0.5+ 0.8+ 200528 T08 0.5- 0.0 191009 G96 0.3+ 0.1+ 191029 C95 0.2- 0.1+ 200528 T08 1.6- 0.1+ 191009 G96 0.2+ 0.4- 191029 C95 0.6+ 0.9- 200528 T08 0.6- 0.0 191009 G96 0.2- 0.2- 191124 461 0.1+ 0.4+ 200528 T08 0.9- 0.0 191009 I52 0.2- 0.4- 191124 461 0.2- 0.5+ 200529 T05 0.6- 0.2+ 191009 I52 0.4+ 0.4- 191125 461 0.3- 0.3+ 200529 T05 0.6- 0.4- 191009 I52 0.1+ 0.4- 191125 461 0.2- 0.3+ 200529 T05 0.8- 0.1- 191009 I52 0.4+ 0.0 191125 461 0.2- 0.3+ 200529 T05 0.8- 0.2+ 191009 094 0.0 0.0 191125 461 0.2- 0.3+ 200601 T08 0.2- 0.4- 191009 094 0.1+ 0.3- 191201 B74 0.2+ 0.5+ 200601 T08 1.0- 0.1- 191009 094 0.2+ 0.0 191201 B74 0.2+ 0.3+ 200601 T08 1.0- 0.4- 191009 Z84 0.0 0.2- 191201 B74 0.1+ 0.2+ 200601 T08 0.9- 0.2- 191009 Z84 0.1- 0.3- 191229 215 0.8+ 0.9- 191009 Z84 0.0 0.1- 191229 215 0.5+ 0.6- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2020 June 2