Nakano Note (Nakano wa Kangaeru noda) NK 3779 P/2019 A3 (PANSTARRS)

The following improved orbital elements, by S. Nakano, are from 36 observations 2018 Aug. 8 to 2019 Jan. 24. 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. Epoch = 2018 July 21.0 TT T = 2018 Aug. 1.80196 +/- 0.00344 (m.e.) TT Peri. = 325.47322 +/- 0.00111 Node = 31.33330 +/- 0.00005 (2000.0) Inc. = 15.36722 +/- 0.00007 q = 2.3134275 +/- 0.0000078 AU e = 0.2648271 +/- 0.0000038 a = 3.1467800 +/- 0.0000193 AU n' = 0.17656495 +/- 0.00000163 P = 5.582 +/- 0.0000514 years The predicted orbit for the 2024 return is as follows: T = 2024 Mar. 2.60956 TT Epoch = 2024 Feb. 20.0 TT Peri. = 325.71333 e = 0.2661250 Node = 31.29334 (2000.0) a = 3.1438117 AU Inc. = 15.37493 n'= 0.17681507 q = 2.3071648 AU P = 5.574 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2018/ 181010 F52 0.0 0.2- 190106 L01 0.4+ 0.4+ 180808 F51 0.2- 0.1- 181018 F52 0.4- 0.0 190106 L01 1.3+ 0.4- 180808 F51 0.1+ 0.2+ 181113 F52 0.2+ 0.5+ 190108 658 0.1+ 0.5+ 180808 F51 0.2+ 0.0 181113 F52 0.0 0.4- 190108 658 0.0 0.3+ 180808 F51 0.3+ 0.2- 181113 F52 0.0 0.0 190108 658 0.1+ 0.0 180811 F51 0.0 0.3+ 2019/ 190108 658 0.4+ 0.0 180811 F51 0.1- 0.2- 190103 F51 0.1+ 0.1+ 190108 658 0.2- 0.1- 180811 F51 0.1+ 0.1+ 190103 F51 0.2+ 0.1+ 190110 568 0.2- 0.1- 180811 F51 0.0 0.1+ 190103 F51 0.0 0.1- 190110 568 0.2- 0.1- 180821 F51 0.0 0.0 190104 568 0.0 0.1+ 190110 568 0.3- 0.1- 180821 F51 0.3- 0.0 190104 568 0.0 0.0 190124 H06 1.4+ 0.4+ 181010 F52 0.2- 0.0 190104 568 0.0 0.0 190124 H06 0.8+ 0.1+ 181010 F52 0.3+ 0.1- 190106 L01 0.4+ 0.8+ ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2019 Feb. 3

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