Nakano Note (Nakano wa Kangaeru noda) NK 4230 C/2020 T5 (Lemmon)
The following improved orbital elements, by S. Nakano, are from 103 observations 2020 Apr. 19 to 2020 Oct. 24. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.51 arc second. The comet has passed 3.04 AU from Jupiter on 2019 Aug. 23 UT. See an orbit in CBET 4877 (same orbit). Epoch = 2020 Sept.28.0 TT T = 2020 Oct. 9.61974 +/- 0.00082 (m.e.) TT Peri. = 90.29086 +/- 0.00054 Node = 237.86186 +/- 0.00010 (2000.0) Inc. = 66.60408 +/- 0.00010 q = 1.8890307 +/- 0.0000098 AU e = 0.9979863 +/- 0.0000171 1/a = +0.0010660 +/- 0.0000091 1/AU origin = +0.002554 (Q= 7) future = +0.001829 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2020/ 201009 I52 0.7- 0.4+ 201020 658 0.0 0.2- 200419 F51 0.2- 0.1- 201009 I52 0.4+ 0.7+ 201020 658 0.2- 0.1- 200419 F51 0.1+ 0.4+ 201009 I52 0.1+ 0.2- 201020 658 0.0 0.0 200419 F51 0.0 0.3- 201009 I52 0.0 0.4+ 201020 658 0.0 0.2+ 200918 G96 1.1+ 0.0 201010 I52 (2.1- 0.3+) 201020 658 0.3+ 0.1- 200918 G96 1.0+ 0.2- 201010 I52 0.5- 0.4- 201020 658 0.3+ 0.0 200918 G96 0.9+ 0.5+ 201010 I52 0.3+ 0.0 201020 I52 0.3+ 0.0 201005 G96 0.1+ 0.6- 201010 I52 0.2+ 0.0 201020 I52 0.1- 0.0 201005 G96 0.0 0.2+ 201012 I52 1.3- 0.1+ 201020 I52 0.9- 0.1+ 201005 G96 0.6- 0.2- 201013 711 0.0 0.2+ 201020 I52 0.1+ 0.0 201005 G96 1.1+ 0.1+ 201013 711 0.1+ 0.2+ 201020 L07 0.4+ 0.3+ 201005 I52 0.4- 0.0 201013 711 0.2- 0.2+ 201020 L07 0.5+ 0.5+ 201005 I52 0.9- 0.9- 201013 711 0.0 0.2+ 201021 658 0.5+ 0.7- 201005 I52 0.2+ 0.3+ 201013 711 0.5- 0.1- 201021 658 0.4+ 0.6- 201006 H21 1.2+ 0.5- 201013 K51 0.4- 0.1- 201021 G58 1.0- 0.9+ 201006 H21 0.8+ 0.3- 201013 K51 0.3- 0.2+ 201021 658 0.3+ 0.8- 201006 H21 0.1+ 0.2+ 201013 K51 0.3- 0.1+ 201021 658 0.4+ 0.8- 201006 I52 1.1- 0.2- 201014 711 0.5- 0.3+ 201021 658 0.4+ 0.7- 201006 I52 0.0 0.2- 201014 711 0.3- 0.1+ 201021 658 0.6+ 0.7- 201006 I52 0.5+ 0.1- 201014 711 0.9- 0.4+ 201021 G58 0.9- 0.4- 201006 I52 0.0 0.4+ 201014 711 0.4- 0.1+ 201021 G58 0.1+ 0.2- 201007 I52 (4.1- 0.3-) 201015 711 0.5+ 0.3+ 201022 658 0.5- 0.2+ 201007 I52 (2.3- 0.7-) 201015 711 (2.3+ 0.6+) 201022 658 0.5- 0.1+ 201007 I52 0.2- 0.9- 201015 711 0.6- 0.8+ 201022 658 0.1- 0.3+ 201007 I52 0.6- 0.0 201016 A77 1.7+ 0.0 201022 658 0.5- 0.5+ 201007 L01 0.4+ 0.3+ 201016 A77 1.6+ 0.4+ 201023 858 0.5- 0.4+ 201007 L01 0.1- 0.5+ 201016 A77 0.6+ 0.8+ 201023 858 0.3+ 0.4+ 201007 L01 0.1+ 0.1+ 201018 204 0.7- 0.7+ 201023 658 0.2+ 0.5- 201007 L01 0.6+ 0.2- 201018 204 0.4- 0.6+ 201023 658 0.2+ 0.5- 201008 I52 1.4- 0.4- 201019 858 0.3+ 0.4- 201023 658 0.1+ 0.4- 201008 I52 1.6- 0.1+ 201019 I52 0.1+ 0.7+ 201023 658 0.0 0.3- 201008 I52 0.2+ 0.5- 201019 I52 0.4- 0.1+ 201023 658 0.1+ 0.3- 201008 I52 0.2- 0.5- 201019 858 0.2- 0.5- 201023 658 0.2+ 0.1+ 201009 H06 0.4- 0.4+ 201019 I52 0.1- 0.1+ 201024 N51 0.7+ 0.6- 201009 H06 0.2- 0.6+ 201019 L07 0.6+ 0.7+ 201024 N51 0.5+ 0.6- 201009 H06 0.1+ 0.3+ 201019 L07 0.5- 0.3- 201024 N51 0.7+ 0.7- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2020 Oct. 27