Nakano Note (Nakano wa Kangaeru noda) NK 4420 C/2020 F6 (PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 102 observations 2020 Mar. 21 to 2021 Jan. 12. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.30 arc second. The comet has passed 2.12 AU from Uranus on 2011 Jan. 18 and 1.27 AU from Jupiter on 2019 Aug. 20 UT. See the previous orbit in CBET 4748, NK 4151 and NK 4348. Epoch = 2020 Apr. 21.0 TT T = 2020 Apr. 11.55775 +/- 0.00112 (m.e.) TT Peri. = 344.58957 +/- 0.00026 Node = 207.88003 +/- 0.00007 (2000.0) Inc. = 174.58135 +/- 0.00003 q = 3.5110314 +/- 0.0000031 AU e = 0.9908144 +/- 0.0000129 1/a = +0.0026162 +/- 0.0000037 1/AU origin = +0.002470 (Q= 8) future = +0.003043 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2020/ 200422 215 0.3+ 0.0 200520 474 0.5+ 0.0 200321 F51 0.1- 0.4+ 200422 215 0.1+ 0.6- 200520 474 0.3+ 0.3- 200321 F51 0.2+ 0.1- 200422 F51 0.1+ 0.1+ 200520 474 0.0 0.2- 200321 F51 0.2+ 0.2- 200422 F51 0.1+ 0.1+ 200520 474 0.0 0.1- 200322 568 0.1- 0.0 200422 F51 0.1- 0.0 200523 568 0.2- 0.1+ 200322 568 0.1- 0.0 200422 F51 0.2+ 0.0 200523 568 0.1- 0.1+ 200322 568 0.0 0.0 200425 F51 0.1+ 0.0 200523 F52 0.2+ 0.4+ 200322 568 0.1- 0.1- 200425 F51 0.2+ 0.2- 200523 F52 0.2+ 0.1- 200322 568 0.0 0.0 200426 F51 0.0 0.0 200523 F52 0.1- 0.1- 200322 568 0.0 0.0 200426 F51 0.0 0.2- 200524 Q11 0.2- 0.6- 200322 F51 0.1- 0.0 200426 F51 0.2- 0.2- 200524 Q11 0.2- 0.3- 200322 F51 0.1- 0.1- 200426 F51 0.3+ 0.0 200525 G96 0.6+ 0.5- 200322 F51 0.1- 0.1- 200427 G96 0.1+ 0.4+ 200525 G96 0.8+ 1.4- 200324 568 0.0 0.0 200427 G96 0.0 0.1- 200525 G96 0.1+ 0.2- 200324 568 0.0 0.1- 200427 G96 0.2+ 0.4- 200525 G96 0.4+ 0.4+ 200324 568 0.1- 0.0 200427 G96 0.2+ 0.2- 200622 568 0.1- 0.1+ 200327 Q62 0.6- 0.1- 200428 F51 0.1- 0.1+ 200622 568 0.1- 0.1+ 200327 Q62 0.8- 0.4+ 200428 F51 0.1- 0.1+ 200622 568 0.0 0.0 200329 L01 1.2+ 0.3- 200428 F51 0.2- 0.0 200622 568 0.1- 0.1+ 200329 L01 0.1- 0.8+ 200428 F51 0.2+ 0.0 200720 568 0.1+ 0.0 200402 F51 0.1+ 0.0 200430 G96 0.3- 0.1+ 200720 568 0.1+ 0.1- 200402 F51 0.1- 0.0 200430 G96 0.2+ 0.2- 200720 568 0.0 0.1- 200402 F51 0.4+ 0.0 200430 G96 0.2+ 0.1- 201217 568 0.2- 0.0 200402 F51 0.1- 0.0 200430 G96 0.0 0.2- 201217 568 0.1- 0.0 200406 I52 0.4- 0.0 200514 G96 0.2+ 0.4- 201217 568 0.2- 0.1- 200406 I52 0.3+ 0.4- 200514 G96 0.4+ 0.4+ 2021/ 200406 I52 0.5- 1.9- 200514 G96 0.5+ 0.2+ 210111 568 0.0 0.2- 200416 G96 0.1+ 0.3- 200514 G96 0.2+ 0.3- 210111 568 0.1+ 0.2- 200416 G96 0.2- 0.3- 200514 F52 0.1+ 0.1+ 210111 568 0.0 0.3- 200416 G96 0.0 0.5- 200514 F52 0.1- 0.0 210111 568 0.0 0.3- 200421 F51 0.1- 0.0 200514 F52 0.1- 0.4+ 210111 568 0.0 0.1- 200421 F51 0.1- 0.2+ 200519 F52 0.2+ 0.3+ 210112 568 0.1- 0.2- 200421 F51 0.1- 0.0 200519 F52 0.1- 0.1- 210112 568 0.1- 0.2- 200421 F51 0.1- 0.1- 200519 F52 0.2- 0.1- 210112 568 0.0 0.2- 200422 215 0.7+ 0.7+ 200519 F52 0.2+ 0.1- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2021 Mar. 23