Nakano Note (Nakano wa Kangaeru noda) NK 4241 C/2020 K6 (Rankin)
The following improved orbital elements, by S. Nakano, are from 43 observations 2020 May 26 to Oct. 18. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.28 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 an orbit in CBET 4788. Epoch = 2021 Sept.23.0 TT T = 2021 Sept.15.49059 +/- 0.03455 (m.e.) TT Peri. = 44.30021 +/- 0.00412 Node = 291.52609 +/- 0.00007 (2000.0) Inc. = 103.64245 +/- 0.00079 q = 5.8681405 +/- 0.0001866 AU e = 1.0030345 +/- 0.0000315 1/a = -0.0005171 +/- 0.0000054 1/AU origin = +0.000063 (Q= 7) 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/ 200527 G96 0.1+ 0.1- 200614 V06 0.5- 0.2+ 200526 G96 0.0 0.6- 200527 G96 0.0 0.2- 200614 V06 0.4- 0.2- 200526 G96 0.2+ 0.2- 200527 G96 0.4- 0.0 200624 215 0.4+ 0.6- 200526 G96 0.2+ 0.4- 200527 G96 0.2+ 0.6+ 200624 215 0.3+ 0.4- 200526 G96 0.7- 0.7- 200528 204 0.2- 1.0+ 200624 215 0.1+ 0.5- 200526 I52 0.2+ 0.2+ 200528 204 0.9- 0.7- 200717 474 0.2+ 0.0 200526 I52 0.4- 1.2+ 200529 I52 0.3- 0.6+ 200717 474 0.2+ 0.1- 200526 I52 0.7+ 0.8+ 200529 I52 0.1- 0.7+ 200717 474 0.1+ 0.0 200526 I52 0.2+ 0.5+ 200529 I52 0.3+ 0.1+ 200813 568 0.1- 0.1+ 200526 474 0.2+ 0.0 200601 I52 0.2- 0.4- 200813 568 0.0 0.1+ 200526 474 0.1+ 0.1- 200601 I52 0.1+ 0.6- 200915 568 0.0 0.0 200526 474 0.1- 0.2+ 200601 I52 0.1+ 0.4- 200915 568 0.0 0.1+ 200526 474 0.2- 0.1+ 200601 I52 0.5+ 0.0 201018 568 0.0 0.1- 200526 Q62 0.2+ 1.0- 200614 V06 0.2- 0.6+ 201018 568 0.0 0.0 200526 Q62 0.4+ 0.2- 200614 V06 0.1- 0.4- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2020 Nov. 8