Nakano Note (Nakano wa Kangaeru noda) NK 4228 C/2020 T2 (Palomar)

The following improved orbital elements, by S. Nakano, are from 62 observations 2019 Dec. 11 to 2020 Oct. 19. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.39 arc second. The comet will pass 3.10 AU from Jupiter on 2022 June 7 UT. See in CBET 4870 (same orbit). Epoch = 2021 July 5.0 TT T = 2021 July 11.13932 +/- 0.00501 (m.e.) TT Peri. = 150.38265 +/- 0.00030 Node = 83.04846 +/- 0.00015 (2000.0) Inc. = 27.87313 +/- 0.00008 q = 2.0546549 +/- 0.0000290 AU e = 0.9934511 +/- 0.0000216 1/a = +0.0031873 +/- 0.0000105 1/AU origin = +0.002900 (Q= 7) future = +0.003810 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2019/ 200229 G96 0.8- 0.1- 201010 H06 0.2- 0.3- 191211 F51 0.2+ 0.1+ 200229 G96 0.4- 0.5- 201010 N88 0.2+ 0.2+ 191211 F51 0.1+ 0.1+ 200324 F52 0.2- 0.3- 201010 N88 0.3- 0.4- 191211 F51 0.2+ 0.1- 200324 F52 0.0 0.4- 201010 N88 0.8+ 0.3- 191211 F51 0.0 0.9+ 200324 F52 0.0 0.2- 201010 N88 0.8- 0.5+ 2020/ 200324 F52 0.3- 0.0 201011 675 1.2+ 0.7+ 200101 F51 0.3- 0.2- 200324 F52 0.1- 0.0 201011 675 1.4+ 0.5- 200101 F51 0.0 0.1- 200421 F52 0.1+ 0.1+ 201011 675 1.6+ 0.3+ 200101 F51 0.1+ 0.1+ 200422 F52 0.2+ 0.0 201018 204 0.6- 0.3+ 200101 F51 0.2+ 0.1+ 200422 F52 0.1+ 0.2+ 201018 204 0.6- 0.2+ 200117 F51 0.1+ 0.1+ 200422 F52 0.1+ 0.1- 201019 L01 0.3- 0.1+ 200117 F51 0.4- 0.0 201007 I41 0.4+ 0.6- 201019 L01 0.6- 0.5+ 200118 F52 0.3- 0.1- 201007 I41 0.3+ 0.1+ 201019 L01 0.7- 0.4+ 200118 F52 0.2+ 0.2- 201007 I41 0.3+ 0.1- 201019 L01 0.1- 0.2+ 200118 F52 0.0 0.1- 201007 I41 0.5+ 0.1+ 201019 L01 0.4- 0.2+ 200118 F52 0.2- 0.5- 201007 I41 0.1+ 0.1- 201019 I41 0.3- 0.0 200126 F51 0.0 0.2+ 201009 I41 0.1- 0.2- 201019 I41 0.0 0.3- 200126 F51 0.2+ 0.0 201009 I41 0.5+ 0.1- 201019 I41 0.1- 0.4- 200126 F51 0.1+ 0.1+ 201009 I41 0.1- 0.0 201019 I41 0.0 0.0 200126 F51 0.1+ 0.0 201010 G40 0.2+ 0.4+ 201019 I41 0.3- 0.1+ 200229 G96 0.7- 0.0 201010 G40 0.0 1.3+ 200229 G96 0.5- 0.0 201010 H06 0.1- 0.1- ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2020 Oct. 22

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