Nakano Note (Nakano wa Kangaeru noda) NK 4478 C/2020 K6 (Rankin)
The following improved orbital elements, by S. Nakano, are from 56 observations 2020 May 26 to 2021 June 8. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.46 arc second. The comet has passed 2.99 AU from Saturn on 2020 Jan. 18 and 1.55 AU from Jupiter on 2020 July 1 UT. See the previous orbits in CBET 4788 and NK 4241 (= HICQ 2021). Epoch = 2021 Sept.23.0 TT T = 2021 Sept.15.46909 +/- 0.01574 (m.e.) TT Peri. = 44.29716 +/- 0.00169 Node = 291.52619 +/- 0.00005 (2000.0) Inc. = 103.64358 +/- 0.00018 q = 5.8683065 +/- 0.0000579 AU e = 1.0030333 +/- 0.0000226 1/a = -0.0005169 +/- 0.0000038 1/AU origin = +0.000063 (Q= 8) future = +0.000090 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2020/ 200528 204 0.8- 0.8- 200915 568 0.0 0.2+ 200526 G96 0.0 0.8- 200529 I52 0.3- 0.4+ 200915 568 0.0 0.3+ 200526 G96 0.2+ 0.4- 200529 I52 0.1- 0.5+ 201018 568 0.1+ 0.2+ 200526 G96 0.2+ 0.5- 200529 I52 0.3+ 0.1- 201018 568 0.1+ 0.3+ 200526 G96 0.6- 0.9- 200601 I52 0.1- 0.6- 2021/ 200526 I52 0.2+ 0.0 200601 I52 0.1+ 0.8- 210406 568 0.8- 1.1- 200526 I52 0.4- 1.0+ 200601 I52 0.1+ 0.5- 210406 568 0.8- 1.3- 200526 I52 0.8+ 0.6+ 200601 I52 0.5+ 0.2- 210505 568 0.1+ 0.3+ 200526 I52 0.2+ 0.4+ 200614 V06 0.1- 0.5+ 210505 568 0.1+ 0.3+ 200526 474 0.2+ 0.2- 200614 V06 0.0 0.6- 210505 568 0.2+ 0.3+ 200526 474 0.1+ 0.2- 200614 V06 0.4- 0.0 210507 568 0.2+ 0.4+ 200526 474 0.1- 0.0 200614 V06 0.4- 0.3- 210507 568 0.3+ 0.3+ 200526 474 0.2- 0.1- 200624 215 0.5+ 0.7- 210509 Q11 1.3+ 0.0 200526 Q62 0.2+ 1.2- 200624 215 0.4+ 0.5- 210509 Q11 1.1+ 0.0 200526 Q62 0.4+ 0.3- 200624 215 0.2+ 0.6- 210509 Q11 1.2+ 0.1+ 200527 G96 0.1+ 0.3- 200717 474 0.3+ 0.0 210608 Q11 0.1+ 0.2+ 200527 G96 0.0 0.3- 200717 474 0.3+ 0.2- 210608 Q11 0.1- 0.3+ 200527 G96 0.4- 0.2- 200717 474 0.1+ 0.0 210608 Q11 0.0 0.1+ 200527 G96 0.3+ 0.4+ 200813 568 0.1- 0.2+ 200528 204 0.1- 0.8+ 200813 568 0.0 0.2+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2021 June 15