Nakano Note (Nakano wa Kangaeru noda) NK 4418 C/2019 Y5 (PANSTARRS)

The following improved orbital elements, by S. Nakano, are from 64 observations 2019 Sept. 11 to 2021 Feb. 13. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.33 arc second. See the previous orbit in CBET 4819. Epoch = 2019 Aug. 25.0 TT T = 2019 Aug. 18.14847 +/- 0.00094 (m.e.) TT Peri. = 303.50086 +/- 0.00012 Node = 51.77149 +/- 0.00001 (2000.0) Inc. = 82.84177 +/- 0.00002 q = 4.9144903 +/- 0.0000046 AU e = 0.9933977 +/- 0.0000055 1/a = +0.0013434 +/- 0.0000011 1/AU origin = +0.001935 (Q= 8) future = +0.001676 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2019/ 191230 807 0.4+ 0.2- 200226 568 0.2- 0.0 190911 F51 0.1- 0.0 191230 807 0.2+ 0.0 200226 568 0.2- 0.1+ 190911 F51 0.1- 0.1- 191230 807 0.2+ 0.1- 200226 568 0.2- 0.1+ 190911 F51 0.1- 0.3+ 191230 474 0.2+ 0.6- 200720 568 0.2- 0.1+ 190918 F51 0.0 0.0 191230 474 1.3+ 0.2- 200720 568 0.1- 0.1+ 190918 F51 0.4- 0.3- 191230 474 0.7+ 0.0 200814 568 0.0 0.1+ 191014 F51 0.0 0.3+ 191231 Q62 0.2+ 0.0 200814 568 0.0 0.1+ 191014 F51 0.0 0.0 191231 Q62 0.6+ 0.2+ 201108 568 0.0 0.0 191014 F51 0.3+ 0.0 2020/ 201108 568 0.0 0.1- 191014 F51 0.1+ 0.1+ 200103 474 0.9+ 0.2- 201114 G96 0.1+ 0.5- 191110 F51 0.1- 0.4- 200103 474 0.9+ 0.1- 201114 G96 0.3+ 0.9- 191110 F51 0.1- 0.1- 200103 474 (2.7+ 0.0 ) 201114 G96 0.1+ 1.0- 191110 F51 0.5+ 0.2+ 200105 291 0.1- 0.1+ 201114 G96 0.6+ 0.8- 191210 F51 0.0 0.2- 200105 291 0.2+ 0.2+ 201217 568 0.3- 0.0 191210 F51 0.1- 0.0 200105 291 0.1+ 0.6+ 201217 568 0.1- 0.0 191210 F51 0.1- 0.2+ 200215 691 1.5- 0.5- 2021/ 191210 F51 0.1- 0.2- 200215 691 0.2- 0.1- 210112 568 0.0 0.0 191228 F51 0.1+ 0.1+ 200223 474 0.4+ 0.1+ 210112 568 0.2- 0.1+ 191228 F51 0.1- 0.0 200223 474 0.3- 0.1+ 210213 568 0.0 0.0 191228 F51 0.0 0.2+ 200223 474 0.6+ 0.2+ 210213 568 0.0 0.0 191228 F51 0.1- 0.0 200223 474 0.6+ 0.6- 210213 568 0.0 0.0 191228 F51 0.2+ 0.0 200226 568 0.1- 0.1+ 210213 568 0.0 0.2+ 191228 F51 0.2+ 0.1- 200226 568 0.1- 0.1+ ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2021 Mar. 22

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