Nakano Note (Nakano wa Kangaeru noda) NK 4451 C/2019 NJ3 (Lemmon)
The following improved orbital elements, by S. Nakano, are from 49 observations 2019 June 5 to 2021 Jan. 12. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.46 arc second. The comet has passed 3.96 AU from Jupiter on 2020 Mar. 23 UT. See the previous orbit in NK 4181 (= CBET 4828, HICQ 2021) Epoch = 2020 Nov. 7.0 TT T = 2020 Oct. 22.28415 +/- 0.00298 (m.e.) TT Peri. = 246.84150 +/- 0.00044 Node = 142.45534 +/- 0.00002 (2000.0) Inc. = 99.43877 +/- 0.00005 q = 4.3616633 +/- 0.0000161 AU e = 1.0008020 +/- 0.0000121 1/a = -0.0001839 +/- 0.0000028 1/AU origin = +0.000020 (Q= 8) future = -0.000008 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2019/ 200730 X02 0.6+ 0.0 201017 W88 0.2- 0.2+ 190605 W84 0.1+ 0.2- 200801 Q62 0.3+ 0.0 201017 W88 0.2- 0.1- 190627 W84 0.5+ 0.2+ 200801 Q62 0.3+ 0.3+ 201017 W88 0.4+ 0.2- 190702 F51 0.2+ 0.2- 200807 W95 0.6+ 0.1- 201017 W88 0.5- 0.4+ 190702 F51 0.0 0.1+ 200807 W95 0.4+ 0.4- 201017 W88 0.4- 0.2- 190702 F51 0.5- 0.2+ 200807 W95 0.1+ 0.2- 201103 X03 0.9- 0.5- 190702 F51 0.3- 0.2+ 200813 Q62 0.2+ 0.5+ 201103 X03 0.5- 0.9+ 190808 W84 0.0 0.1- 200813 Q62 0.3+ 0.1+ 201103 X03 0.5- 0.8- 191017 F52 0.2+ 0.3- 200813 Q62 0.4+ 0.1- 201111 474 0.1- 0.0 191017 F52 0.1- 0.0 200816 W88 0.6+ 0.0 201111 474 0.1- 0.0 191017 F52 0.4+ 0.3+ 200816 W88 0.7+ 0.3- 201111 474 0.0 0.2- 191017 F52 0.1+ 0.4- 200816 W88 1.5+ 0.7- 201111 474 0.0 0.0 2020/ 200916 E94 1.0- 0.8+ 2021/ 200725 X74 0.3- 0.1+ 200916 E94 0.1- 0.2- 210112 Q62 0.1- 0.5+ 200725 X74 0.6- 1.2+ 200916 E94 0.8- 0.0 210112 Q62 0.3- 0.4+ 200725 X74 0.8- 0.8+ 200916 E94 0.8- 0.7+ 210112 Q62 0.1- 0.4+ 200725 X74 0.3- 0.1- 201015 W88 0.1+ 1.4+ 200730 X02 0.6+ 0.1+ 201015 W88 0.1- 0.7+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2021 May 8