Nakano Note (Nakano wa Kangaeru noda) NK 4786 C/2019 G4 (PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 38 observations 2018 July 24 to 2020 Nov. 11. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.32 arc second. The comet has passed 6.94 AU from Neptune on 2006 Apr. 27 UT. See an orbit in CBET 5154 (same orbit). Epoch = 2018 Aug. 30.0 TT T = 2018 Sept.15.16166 +/- 0.00241 (m.e.) TT Peri. = 287.83453 +/- 0.00029 Node = 130.47576 +/- 0.00003 (2000.0) Inc. = 138.37557 +/- 0.00003 q = 5.8580167 +/- 0.0000157 AU e = 0.9996327 +/- 0.0000082 1/a = +0.0000627 +/- 0.0000014 1/AU origin = +0.000084 (Q= 9) future = +0.000170 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2018/ 190415 807 0.8+ 0.2+ 191228 568 0.4+ 0.2- 180724 W84 0.2- 0.3- 190415 807 0.4+ 0.3- 2020/ 180724 W84 0.3- 0.0 190425 Q62 0.2- 0.0 200130 568 0.1- 0.1+ 2019/ 190425 Q62 0.0 0.2- 200130 568 0.2- 0.1+ 190409 F51 0.1- 0.2+ 190425 Q62 0.3+ 0.1+ 200130 568 0.1- 0.0 190409 F51 0.0 0.3+ 191024 568 0.0 0.1+ 200201 568 0.3+ 0.3- 190409 F51 0.0 0.0 191024 568 0.0 0.0 200201 568 0.7+ 0.3- 190409 807 1.1+ 0.7- 191024 568 0.2- 0.0 200201 568 0.4+ 0.2- 190409 807 0.5+ 0.8- 191024 568 0.1- 0.1+ 200226 568 0.1- 0.1- 190409 807 0.5+ 0.8- 191027 568 0.2+ 0.2- 200226 568 0.0 0.2+ 190411 807 0.4+ 0.6- 191027 568 0.0 0.2- 200521 568 0.2- 0.1+ 190411 807 0.4+ 0.2- 191129 568 0.0 0.1- 201111 568 0.0 0.0 190411 807 0.4+ 0.4- 191129 568 0.0 0.1- 201111 568 0.4+ 0.1- 190414 807 0.2+ 0.1- 191228 568 0.4+ 0.1- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2022 Aug. 7