Nakano Note (Nakano wa Kangaeru noda) NK 4129 C/2020 A3 (ATLAS)
The following improved orbital elements, by S. Nakano, are from 65 observations 2020 Jan. 3 to May 19. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.58 arc second. The comet has passed 3.87 AU from Saturn on 2017 July 18 and 3.05 AU from Jupiter on 2018 Oct. 8 UT. See an orbit in CBET 4716. Epoch = 2019 July 16.0 TT T = 2019 June 28.88355 +/- 0.09724 (m.e.) TT Peri. = 268.41284 +/- 0.00866 Node = 120.79256 +/- 0.00193 (2000.0) Inc. = 146.70038 +/- 0.00037 q = 5.7672076 +/- 0.0003027 AU e = 0.9990554 +/- 0.0002406 1/a = +0.0001638 +/- 0.0000417 1/AU origin = +0.000189 (Q= 6) future = +0.000360 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2020/ 200118 J04 0.1+ 0.2+ 200224 T08 0.2+ 1.6- 200103 T08 0.7- 0.6- 200118 I47 0.2+ 0.0 200301 Q62 0.1- 0.1- 200103 T08 0.7+ 0.5- 200118 I47 0.2+ 0.1- 200301 Q62 0.5- 0.4+ 200107 T08 (0.5+ 2.2-) 200118 I47 0.4+ 0.0 200314 R57 0.8+ 0.4- 200107 T08 0.5- 0.8- 200118 F65 0.2- 0.3+ 200314 R57 0.1+ 0.0 200107 T08 1.1+ 0.7- 200118 F65 0.1- 0.5+ 200314 R57 0.0 0.8- 200107 T08 1.0+ 1.2- 200119 W85 0.6+ 0.0 200319 T08 0.5- 0.2+ 200113 807 0.3- 0.1+ 200119 W85 0.4+ 0.7+ 200319 T08 0.1- 0.9+ 200113 807 0.5- 0.2+ 200119 T08 0.5+ 0.2- 200319 T08 0.8- 0.7- 200113 807 0.1- 0.5+ 200119 T08 0.3+ 0.4- 200319 T08 1.2+ 1.7- 200113 807 0.3- 0.5+ 200119 T08 0.5- 0.4+ 200321 T05 1.7+ 0.6- 200114 K93 0.2- 0.9+ 200119 T08 0.7+ 1.3- 200321 T05 0.1+ 0.6- 200114 K93 0.2- 1.4+ 200120 Q62 0.0 0.3+ 200321 T05 0.5+ 0.4+ 200114 K93 0.4- 0.9+ 200120 Q62 0.4- 0.1+ 200321 T05 0.8- 0.0 200114 K93 0.3- 1.2+ 200129 Q62 0.4- 0.3- 200328 E94 0.9- 0.5+ 200117 K91 0.2- 0.7+ 200129 Q62 0.4- 0.4- 200328 E94 0.8- 1.0- 200117 K91 0.0 0.8+ 200223 474 0.2- 0.1+ 200328 E94 1.6- 0.0 200117 K91 0.2- 0.8+ 200223 474 0.2- 0.1+ 200519 474 0.7+ 0.3+ 200117 K91 0.1+ 0.4+ 200223 474 0.1- 0.1- 200519 474 0.3+ 0.1+ 200117 J04 0.0 0.5+ 200223 474 0.1- 0.1+ 200519 474 0.1+ 0.3+ 200117 J04 0.1+ 0.1+ 200224 T08 0.6- 0.0 200519 474 0.2+ 0.5+ 200118 J04 0.0 0.2+ 200224 T08 0.1+ 0.4+ 200118 J04 0.0 0.4+ 200224 T08 0.2+ 0.7- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2020 June 3