Nakano Note (Nakano wa Kangaeru noda) NK 4232 C/2020 U4 (PANSTARRS)

The following improved orbital elements, by S. Nakano, are from 42 observations 2019 Nov. 9 to 2020 Oct. 24. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.16 arc second. The comet will pass 1.57 AU from Jupiter on 2023 Feb. 10 and pass 2.40 AU from Saturn on 2024 July 25 UT. See an orbit in CBET 4880 (same orbit). Epoch = 2022 Apr. 11.0 TT T = 2022 Apr. 7.99054 +/- 0.00366 (m.e.) TT Peri. = 69.53676 +/- 0.00121 Node = 120.01375 +/- 0.00004 (2000.0) Inc. = 167.03596 +/- 0.00007 q = 5.3535184 +/- 0.0001105 AU e = 1.0013630 +/- 0.0000235 1/a = -0.0002546 +/- 0.0000044 1/AU origin = +0.000011 (Q= 8) future = -0.000125 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2019/ 200130 F51 0.1- 0.1- 201013 G96 0.2+ 0.1+ 191109 F52 0.1- 0.2- 200419 F52 0.0 0.0 201017 F52 0.0 0.2+ 191128 F52 0.1- 0.2+ 200419 F52 0.1- 0.1- 201022 F51 0.0 0.0 191128 F52 0.1- 0.1- 200927 F51 0.1- 0.0 201022 F51 0.0 0.0 191128 F52 0.0 0.1- 200927 F51 0.1- 0.0 201022 F51 0.1+ 0.0 191128 F52 0.1+ 0.1- 200927 F51 0.2- 0.0 201022 F51 0.0 0.0 191220 F52 0.0 0.1+ 200927 F51 0.1- 0.0 201023 F51 0.0 0.0 191220 F52 0.2+ 0.3+ 201003 F51 0.0 0.1+ 201023 F51 0.1+ 0.0 2020/ 201003 F51 0.1- 0.1+ 201023 F51 0.0 0.0 200126 F51 0.2- 0.0 201003 F51 0.1+ 0.0 201023 N51 0.3- 0.0 200126 F51 0.1- 0.1- 201003 F51 0.0 0.0 201023 N51 0.3- 0.0 200126 F51 0.1- 0.1- 201005 F52 0.2+ 0.3- 201023 N51 0.1- 0.1- 200130 F51 0.2- 0.0 201013 G96 0.1+ 0.2- 201024 H06 0.1+ 0.2- 200130 F51 0.0 0.1- 201013 G96 0.1- 0.1- 201024 H06 0.4+ 0.1- 200130 F51 0.8+ 0.5+ 201013 G96 0.3+ 0.1+ ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2020 Oct. 28

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