Nakano Note (Nakano wa Kangaeru noda) NK 4985 C/2020 H11 (PANSTARRS-Lemmon)
The following improved orbital elements, by S. Nakano, are from 53 observations 2019 June 2 to 2021 May 8. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.27 arc second. The comet has passed 2.60 AU from Saturn on 2017 Nov. 9 and 4.05 AU from Jupiter on 2019 Mar. 4 UT. See an orbit in CBET 5249 (same orbit). Epoch = 2020 Sept.28.0 TT T = 2020 Sept.15.67036 +/- 0.00335 (m.e.) TT Peri. = 91.50043 +/- 0.00023 Node = 303.00339 +/- 0.00006 (2000.0) Inc. = 151.41469 +/- 0.00001 q = 7.6310690 +/- 0.0000207 AU e = 1.0000207 +/- 0.0000167 1/a = -0.0000027 +/- 0.0000022 1/AU origin = +0.000213 (Q= 8) future = +0.000316 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2019/ 200323 F52 0.1- 0.4+ 200520 G96 0.5+ 0.4- 190602 F51 0.2- 0.1- 200323 F52 0.1- 0.2+ 200520 G96 0.4+ 0.9+ 190602 F51 0.0 0.0 200419 F52 0.1- 0.1+ 200520 G96 0.3- 0.0 190607 F51 0.2- 0.1- 200419 F52 0.3+ 0.1+ 200523 F51 0.2- 0.4+ 190607 F51 0.1+ 0.2- 200421 F51 0.0 0.2- 200523 F51 0.0 0.1+ 190607 F51 0.2+ 0.0 200421 F51 0.3+ 0.2- 200523 F51 0.3+ 0.2- 190609 F51 0.1- 0.1+ 200421 F51 0.1+ 0.2- 200523 F51 0.4- 0.3- 190609 F51 0.1+ 0.0 200421 F51 0.2+ 0.2+ 2021/ 190609 F51 0.0 0.0 200427 F51 0.1+ 0.3+ 210318 G96 0.4+ 0.1+ 190609 F51 0.0 0.2- 200427 F51 0.0 0.0 210318 G96 0.1+ 0.2+ 190610 F51 0.2- 0.1+ 200427 F51 0.1+ 0.0 210318 G96 0.5+ 0.2- 190610 F51 0.0 0.2- 200515 G96 0.7+ 1.0- 210318 G96 0.7+ 0.1- 190610 F51 0.1+ 0.2- 200515 G96 0.3+ 0.1- 210408 F51 0.0 0.1- 190629 F52 0.1- 0.2- 200515 G96 0.2- 0.1+ 210408 F51 0.2- 0.0 190629 F51 0.3- 0.3+ 200515 G96 0.9+ 0.4- 210408 F51 0.0 0.0 190724 F51 0.1+ 0.1- 200517 F51 0.0 0.0 210416 F52 0.3+ 0.2- 190724 F51 0.0 0.1- 200517 F51 0.0 0.0 210430 F51 0.0 0.3- 190724 F51 0.4+ 0.3+ 200517 F51 0.4- 0.3+ 210508 F51 0.3- 0.1+ 2020/ 200520 G96 0.1+ 0.1- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2023 Apr. 28