Nakano Note (Nakano wa Kangaeru noda) NK 4105 C/2020 B2 (Lemmon)
The following improved orbital elements, by S. Nakano, are from 106 observations 2020 Jan. 19 to Apr. 28. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.40 arc second. The comet has passed 1.98 AU from Uranus on 2010 Dec. 17 UT. Epoch = 2020 Feb. 1.0 TT T = 2020 Jan. 26.28558 +/- 0.00537 (m.e.) TT Peri. = 143.62908 +/- 0.00175 Node = 354.33902 +/- 0.00035 (2000.0) Inc. = 55.70389 +/- 0.00079 q = 2.7680377 +/- 0.0000369 AU e = 0.9592162 +/- 0.0000447 1/a = +0.0147338 +/- 0.0000161 1/AU a = 67.87 AU P = 559.1 years origin = +0.014473 (Q= 7) future = +0.015063 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2020/ 200124 K88 0.3+ 0.4- 200129 291 0.3- 0.5+ 200119 G96 0.0 0.4+ 200124 I52 0.5- 0.4+ 200129 291 0.1+ 0.2+ 200119 G96 0.3+ 0.3+ 200124 I52 0.3- 0.1- 200129 291 0.3+ 0.3+ 200119 G96 0.2+ 0.2- 200124 I52 0.3+ 0.6+ 200130 I52 0.3+ 0.0 200119 H01 0.2+ 0.1- 200124 I52 0.1- 0.4+ 200130 I52 0.1+ 0.1+ 200119 H01 0.3+ 0.0 200125 K88 0.1- 0.8+ 200130 I52 0.0 0.0 200119 I52 1.1- 0.3- 200125 K88 0.7- 0.3+ 200131 I52 0.6- 0.1- 200119 H01 0.2+ 0.0 200125 K88 0.2- 0.1+ 200131 I52 0.7- 0.6- 200119 I52 1.1- 0.2- 200125 I52 0.3- 0.0 200131 I52 0.4- 0.1+ 200119 H01 0.2+ 0.0 200125 I52 0.1+ 0.8- 200205 291 1.1+ 0.1- 200119 I52 0.2- 0.1+ 200125 I52 1.0- 0.1+ 200205 291 0.5- 0.2+ 200119 H01 0.3+ 0.0 200125 I52 0.9- 1.1+ 200205 291 0.1- 0.3+ 200120 H01 0.3+ 0.1- 200126 I52 0.4- 0.1- 200205 I52 1.0+ 0.2+ 200120 H01 0.3+ 0.0 200126 I52 0.4- 0.1- 200205 I52 0.3- 1.5+ 200120 H01 0.2+ 0.0 200126 I52 0.4- 0.0 200205 587 0.9+ 1.0+ 200120 H01 0.2+ 0.0 200126 G37 0.2+ 0.0 200205 587 0.9+ 1.0+ 200120 H01 0.2+ 0.0 200126 G37 0.1+ 0.1- 200205 587 0.6+ 0.5+ 200120 H01 0.2+ 0.0 200126 G37 0.2+ 0.1- 200206 G96 0.2- 0.1+ 200120 H01 0.3+ 0.1- 200126 G37 0.2+ 0.0 200206 G96 0.2+ 0.2+ 200122 F65 0.1+ 0.1- 200126 I52 0.0 0.2- 200206 G96 1.0- 0.1- 200122 F65 0.2- 0.3- 200127 F51 0.2+ 0.1- 200206 G96 0.0 0.4- 200123 L01 0.6- 0.1+ 200128 I52 0.1- 0.1- 200215 A71 0.8- 0.1+ 200123 L01 0.2- 0.2- 200128 I52 1.6- 0.7- 200215 A71 0.3- 0.2- 200123 204 0.4+ 0.3- 200128 I52 0.3+ 0.3- 200220 215 0.1- 0.3- 200123 L01 0.3- 0.1- 200128 F52 0.2+ 0.1- 200220 215 0.3- 0.1+ 200123 204 0.3- 0.0 200128 F52 0.1+ 0.1- 200220 215 0.7- 0.3+ 200123 H06 0.1- 0.3+ 200128 F52 0.2+ 0.3- 200315 118 0.7+ 0.1- 200123 H06 0.3+ 0.5+ 200129 Z84 0.3+ 0.1- 200315 118 0.7- 0.3+ 200123 I52 0.1- 0.3+ 200129 Z84 0.0 0.1- 200416 F51 0.2+ 0.0 200123 I52 0.2+ 0.3+ 200129 Z84 0.0 0.3+ 200416 F51 0.2- 0.1- 200123 I52 0.6+ 0.1+ 200129 Z84 0.1- 0.3- 200416 F51 0.2+ 0.1+ 200123 F65 0.3+ 0.0 200129 I41 0.3- 0.1- 200428 G96 0.4- 0.0 200123 F65 0.2+ 0.0 200129 I41 0.5- 0.2- 200428 G96 0.4- 0.2- 200123 F65 0.2+ 0.1- 200129 I41 0.7- 0.4- 200428 G96 0.3- 0.0 200124 K88 0.3- 0.1+ 200129 I41 0.2- 0.1- 200428 G96 0.3- 0.4+ 200124 K88 0.0 0.3+ 200129 I41 0.7- 0.4- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2020 May 4