Nakano Note (Nakano wa Kangaeru noda) NK 4529 C/2020 K7 (PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 101 observations 2020 May 30 to 2021 Sept. 13. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.50 arc second. Observations on 2021 September show the residuals of about 13" from an orbit in NK 4377 (= HICQ 2021). The comet has passed 1.79 AU from Jupiter on 2019 Dec. 18 and 3.65 AU from Saturn on 2020 Feb. 26 UT. Epoch = 2019 Nov. 13.0 TT T = 2019 Oct. 27.11122 +/- 0.00864 (m.e.) TT Peri. = 357.95704 +/- 0.00094 Node = 286.11178 +/- 0.00003 (2000.0) Inc. = 32.05689 +/- 0.00004 q = 6.3816303 +/- 0.0000423 AU e = 0.9479355 +/- 0.0000159 1/a = +0.0081585 +/- 0.0000025 1/AU a = 122.6 AU P = 1357 years origin = +0.008667 (Q= 8) future = +0.010744 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2020/ 200627 F51 0.1+ 0.0 200823 T08 0.2+ 0.6- 200530 F51 0.0 0.1- 200627 F51 0.4- 0.2+ 200823 T08 0.8- 0.9- 200530 F51 0.0 0.0 200627 F51 0.0 0.1- 201118 G96 0.4- 0.2+ 200530 F51 0.1+ 0.2- 200627 F51 0.2- 0.1+ 201118 G96 0.1+ 0.5+ 200530 F51 0.1+ 0.0 200628 T08 0.7- 0.7- 201118 G96 0.5- 0.3- 200531 850 1.2- 0.5+ 200628 T08 1.2- 0.2- 201118 G96 0.2- 0.0 200531 850 0.9- 0.5+ 200628 T08 1.0- 0.3- 201118 K61 0.8- 0.8+ 200531 850 0.5- 0.3+ 200628 T08 1.0- 0.0 201118 K61 1.0- 0.8+ 200531 H06 0.5- 0.0 200628 T08 0.5- 1.1- 201118 K61 0.7- 0.6+ 200531 H06 0.3- 0.3- 200628 T08 0.5- 0.7- 201118 L01 0.0 0.2+ 200531 H06 0.4- 0.2- 200709 215 0.6- 0.1+ 201118 L01 0.3- 0.4+ 200601 850 1.1- 0.5+ 200709 215 0.8- 0.7- 201118 L01 0.5- 0.1+ 200601 850 0.1- 0.1+ 200709 215 0.7- 0.5+ 201118 L01 0.2- 0.3+ 200601 850 0.1+ 0.1+ 200719 F51 0.2+ 0.1- 2021/ 200601 I52 0.3- 0.0 200719 F51 0.0 0.1+ 210804 D29 0.9- 0.1- 200601 I52 0.3- 0.4+ 200719 F51 0.2+ 0.1- 210804 D29 1.1- 0.1+ 200601 I52 0.7- 0.1+ 200719 F51 0.0 0.0 210804 D29 1.0- 0.3- 200601 L01 0.5- 0.2+ 200721 K77 0.5+ 0.8+ 210805 Q21 1.9+ 0.5+ 200602 L01 0.7- 0.7+ 200721 K77 (2.0- 0.5+) 210805 Q21 0.8+ 1.3+ 200602 L01 0.2- 0.0 200723 F52 0.2+ 0.0 210805 D29 0.5- 0.1- 200602 L01 0.8- 0.5- 200723 F52 0.1+ 0.0 210805 D29 0.4- 0.1- 200602 X02 0.3- 0.1+ 200723 F52 0.2+ 0.2- 210805 D29 1.3- 0.3+ 200602 X02 0.3- 0.0 200723 F52 0.3+ 0.0 210805 L81 0.6- 0.4+ 200602 850 0.6- 0.8+ 200811 T08 1.3- 0.2+ 210805 L81 0.4- 0.1- 200602 850 (3.1- 0.8+) 200811 T08 0.4+ 0.2- 210830 F51 0.0 0.1+ 200615 F52 0.1- 0.1- 200811 T08 0.0 1.0+ 210830 F51 0.1- 0.1+ 200615 F52 0.1+ 0.2+ 200811 T08 0.7- 0.2+ 210830 F51 0.2+ 0.0 200615 F52 0.2+ 0.1- 200816 D29 0.1- 0.0 210830 F51 0.1- 0.2- 200620 F52 0.4+ 0.1- 200816 D29 0.3- 0.3- 210910 F52 0.3+ 0.1- 200620 F52 0.3+ 0.1- 200816 D29 0.3- 0.0 210910 F52 0.1+ 0.1- 200620 F52 0.1- 0.0 200817 D29 0.4- 0.2+ 210910 F52 0.4+ 0.0 200622 F51 0.1+ 0.2+ 200817 D29 0.5- 0.1- 210910 F52 0.1- 0.1- 200622 F51 0.1+ 0.0 200817 D29 0.8- 0.2+ 210913 D29 1.0- 0.1- 200622 F51 0.3+ 0.0 200823 T08 0.5- 0.1- 210913 D29 0.9- 0.1+ 200622 F51 0.1+ 0.0 200823 T08 0.7- 0.2+ 210913 D29 1.5- 0.0 ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2021 Sept. 24