Nakano Note (Nakano wa Kangaeru noda) NK 4386 C/2020 S8 (Lemmon)
The following improved orbital elements, by S. Nakano, are from 85 observations 2020 July 29 to 2021 Jan. 17. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.44 arc second. The comet has passed 7.30 AU from Uranus on 2013 Oct. 21 UT. See the previous orbits in CBET 4876 and NK 4308. Epoch = 2021 Apr. 16.0 TT T = 2021 Apr. 10.92858 +/- 0.00267 (m.e.) TT Peri. = 160.33203 +/- 0.00140 Node = 24.05189 +/- 0.00041 (2000.0) Inc. = 108.51842 +/- 0.00008 q = 2.3639046 +/- 0.0000428 AU e = 0.9913665 +/- 0.0000214 1/a = +0.0036522 +/- 0.0000090 1/AU origin = +0.003638 (Q= 7) future = +0.004252 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2020/ 200918 V06 0.5- 0.3+ 201012 L01 0.0 0.0 200729 F51 0.1+ 0.3+ 200919 H21 0.7+ 0.2+ 201012 L01 0.4+ 0.4+ 200811 F51 0.4+ 0.4- 200919 H21 0.6+ 0.9+ 201012 L01 0.0 0.3+ 200811 F51 0.3+ 0.3+ 200919 H21 0.6+ 0.7+ 201012 L01 0.1+ 0.3+ 200811 F51 0.2+ 0.3+ 200919 I52 0.4+ 0.7+ 201014 711 0.3+ 0.2- 200826 F52 0.7- 0.2- 200919 I52 0.4+ 0.3+ 201014 711 0.1+ 0.4- 200826 F52 0.5- 0.2+ 200919 I52 0.3+ 0.1+ 201014 711 0.3+ 0.5- 200826 F52 0.3- 0.5- 200919 I52 0.4+ 0.7+ 201015 711 0.5+ 0.6- 200828 F52 0.4+ 0.2- 200920 I52 0.2- 0.0 201015 711 0.4+ 0.3+ 200829 F51 0.3- 0.0 200920 I52 0.0 0.1- 201015 711 0.0 0.4+ 200829 F51 0.1+ 0.1- 200920 I52 0.8- 0.0 201015 711 1.0- 0.5+ 200829 F51 0.1+ 0.1+ 200920 I52 0.4+ 0.6+ 201020 I52 0.2+ 0.1- 200904 G96 1.8+ 0.6+ 200921 H06 0.1+ 0.3+ 201020 I52 0.1- 0.5- 200904 G96 0.4+ 0.1+ 200921 H06 0.2- 0.3+ 201020 I52 0.3- 0.1- 200904 G96 0.1+ 0.1+ 200921 H06 0.4+ 0.1- 201020 I52 0.2- 0.5- 200904 G96 1.1+ 0.0 200927 I52 0.1- 0.1+ 201021 I52 0.3- 0.2+ 200904 F51 0.1+ 0.3- 200927 I52 0.2+ 0.1+ 201021 I52 0.1+ 0.1- 200904 F51 0.0 0.1- 200927 I52 0.5- 0.0 201021 I52 1.4+ 0.8+ 200904 F51 0.2+ 0.1- 200927 I52 0.3+ 0.2+ 201021 I52 (1.5+ 2.6+) 200904 F51 0.1- 0.2- 201005 I52 0.3+ 0.5+ 201109 215 0.2+ 0.4+ 200905 F51 0.4- 0.2- 201005 I52 0.0 0.2+ 201109 215 0.2+ 0.2+ 200905 F51 0.1+ 0.1+ 201005 I52 0.1- 0.2+ 201109 215 0.0 0.2- 200905 F51 0.1- 0.0 201005 I52 0.3- 0.3+ 2021/ 200918 G96 0.3+ 0.7+ 201009 I52 0.1- 1.1+ 210108 Q11 0.3- 0.9- 200918 G96 0.4- 0.4+ 201009 I52 0.1- 1.2+ 210108 Q11 0.2- 0.9- 200918 G96 0.6- 0.2- 201009 I52 0.2- 0.8+ 210117 Q11 0.1+ 0.1+ 200918 G96 0.3+ 0.7+ 201009 I52 0.9- 0.6+ 210117 Q11 0.0 0.2+ 200918 V06 0.7- 0.5- 201010 I52 0.8+ 0.4+ 210117 Q11 0.1- 0.1- 200918 V06 0.7- 0.2- 201010 I52 0.5+ 0.2+ 200918 V06 0.5- 0.1- 201010 I52 0.7+ 0.4- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2021 Jan. 29