Nakano Note (Nakano wa Kangaeru noda) NK 4469 C/2020 PV6 (PANSTARRS)

The following improved orbital elements, by S. Nakano, are from 76 observations 2020 July 21 to 2021 May 26. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.32 arc second. The comet has passed 2.14 AU from Jupiter on 2021 Feb. 25 UT. See an orbit in CBET 4969 (same orbit). Epoch = 2021 Sept.23.0 TT T = 2021 Sept.25.99907 +/- 0.00027 (m.e.) TT Peri. = 71.38010 +/- 0.00015 Node = 329.14389 +/- 0.00002 (2000.0) Inc. = 128.23945 +/- 0.00004 q = 2.2956452 +/- 0.0000060 AU e = 0.9449340 +/- 0.0000026 1/a = +0.0239871 +/- 0.0000011 1/AU origin = +0.023996 (Q= 8) future = +0.024410 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2020/ 201015 474 0.2+ 0.0 210520 T05 0.4- 0.2- 200721 F51 0.0 0.2+ 201207 F51 0.0 0.1+ 210520 T05 0.4+ 0.0 200721 F51 0.1+ 0.1+ 201207 F51 0.0 0.1+ 210523 Q59 0.7+ 1.3+ 200721 F51 0.0 0.2+ 201207 F51 0.1+ 0.1+ 210523 Q59 0.1- 1.1+ 200813 F51 0.2- 0.1- 2021/ 210523 Q59 0.3+ 1.0+ 200813 F51 0.1- 0.1+ 210425 703 0.1- 0.2+ 210524 703 0.8- 0.6- 200813 F51 0.0 0.1- 210425 703 0.3- 0.6- 210524 703 0.7- 1.2- 200814 F51 0.0 0.1+ 210425 703 0.6- 0.7- 210524 703 0.5- 0.8- 200814 F51 0.0 0.1- 210425 703 0.4- 0.3- 210524 703 0.9- 0.9- 200814 F51 0.0 0.1+ 210512 G96 0.1- 0.0 210525 T05 0.0 0.1+ 200814 F51 0.1+ 0.0 210512 G96 0.0 0.1- 210525 T05 0.3+ 0.1+ 200814 474 0.2- 0.0 210512 G96 0.1- 0.0 210525 T05 0.1+ 0.0 200814 474 0.1+ 0.6- 210512 G96 0.0 0.1+ 210525 T05 0.2+ 0.1- 200814 474 0.4- 0.3- 210517 Q62 0.4+ 0.2+ 210525 C51 1.0+ 0.2+ 200815 F51 0.1+ 0.3- 210517 Q62 0.4+ 0.2+ 210525 C51 0.1- 0.2+ 200815 F51 0.0 0.2- 210517 Q62 0.4+ 0.3+ 210525 C51 0.5- 0.2+ 200818 568 0.0 0.0 210518 Q62 0.0 0.1- 210525 C51 0.6+ 0.6- 200818 568 0.0 0.0 210518 Q62 0.2+ 0.3- 210526 C51 (0.6+ 2.1+) 200818 568 0.0 0.0 210519 204 0.1+ 0.0 210526 204 0.2+ 0.5+ 200818 Q62 0.2+ 0.3- 210519 204 0.1- 0.1+ 210526 204 0.1+ 0.3+ 200818 Q62 0.2+ 0.1- 210519 204 0.1- 0.1+ 210526 204 0.3+ 0.2+ 200819 F51 0.0 0.1+ 210520 G96 0.3+ 0.1+ 210526 C51 0.5- 0.4+ 200819 F51 0.1- 0.1+ 210520 G96 0.1- 0.1- 210526 C51 0.1+ 0.4+ 200819 F51 0.0 0.0 210520 G96 0.2+ 1.1- 210526 C51 0.1+ 0.5+ 200819 F51 0.1- 0.0 210520 G96 0.3+ 0.1+ 210526 C51 0.1- 0.1- 201015 474 0.1+ 0.1- 210520 T05 0.1- 0.4- 201015 474 0.3+ 0.0 210520 T05 0.3- 0.3- ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2021 May 29

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