Nakano Note (Nakano wa Kangaeru noda) NK 3698 P/2018 L1 (PANSTARRS)

The following improved orbital elements, by S. Nakano, are from 67 observations 2018 May 18 to Sept. 6. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.43 arc second. Epoch = 2018 Nov. 18.0 TT T = 2018 Nov. 12.52917 +/- 0.00423 (m.e.) TT Peri. = 17.89032 +/- 0.00160 Node = 268.62732 +/- 0.00060 (2000.0) Inc. = 10.59464 +/- 0.00013 q = 1.8856627 +/- 0.0000213 AU e = 0.4830412 +/- 0.0000450 a = 3.6476075 +/- 0.0003199 AU n' = 0.14147898 +/- 0.00001861 P = 6.966 +/- 0.0009165 years (+/- 0.33 day) The predicted orbit for the 2025 return is as follows: T = 2025 Nov. 5.36976 TT Epoch = 2025 Nov. 21.0 TT Peri. = 17.94124 e = 0.4812848 Node = 268.58216 (2000.0) a = 3.6578777 AU Inc. = 10.57467 n'= 0.14088355 q = 1.8973967 AU P = 6.996 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2018/ 180605 691 0.1+ 0.4- 180616 474 0.1- 0.1- 180518 G96 0.1- 0.2- 180605 691 0.5+ 0.5- 180616 474 0.1+ 0.2- 180518 G96 0.6+ 0.8- 180605 691 1.2+ 0.5- 180620 215 1.0+ 0.0 180518 G96 0.5+ 0.0 180605 F65 0.1- 0.6+ 180620 215 0.0 0.3- 180518 G96 0.1+ 0.1+ 180605 F65 0.2- 0.2+ 180620 215 1.0+ 0.1- 180603 F51 0.1- 0.1+ 180605 F65 0.5- 0.5+ 180713 Q62 0.1+ 0.3- 180603 F51 0.2- 0.1+ 180605 F65 0.6- 0.6+ 180713 Q62 0.1+ 0.2- 180603 F51 0.2- 0.1+ 180605 F65 0.3- 0.4+ 180713 Q62 0.0 0.1+ 180604 H36 0.4+ 0.2+ 180605 F65 0.3- 0.4+ 180718 474 0.1- 0.2- 180604 H36 1.2+ 0.6+ 180605 F65 0.0 0.7+ 180718 474 0.3+ 0.1- 180604 I52 0.2+ 1.0- 180605 F65 0.1+ 0.2- 180718 474 0.3- 0.1+ 180604 H36 0.3- 0.4+ 180606 691 1.2+ 0.3- 180809 474 0.3- 0.2+ 180604 I52 1.1+ 0.2+ 180606 691 0.5+ 0.2- 180809 474 0.2+ 0.4- 180604 I52 0.0 0.1+ 180606 691 0.9+ 0.0 180809 474 0.1- 0.9- 180604 I52 0.9+ 0.1- 180606 568 0.3- 0.0 180811 474 0.2- 0.1- 180604 Q62 0.0 0.5- 180606 568 0.3- 0.0 180811 474 0.5- 0.0 180604 Q62 0.1+ 0.5- 180606 568 0.3- 0.1+ 180811 474 0.2- 0.0 180604 Q62 0.2+ 0.6- 180607 I52 0.1+ 0.3- 180811 474 0.0 0.1+ 180604 G40 0.2+ 0.0 180607 I52 0.3+ 0.1- 180906 474 0.1- 0.4+ 180604 G40 0.7+ 0.3- 180607 I52 1.5+ 0.4- 180906 474 0.1- 0.3+ 180604 G40 0.1- 0.1+ 180607 G40 0.5+ 0.3- 180906 474 0.1+ 0.3+ 180604 G40 0.7+ 0.3- 180607 G40 0.4+ 0.3- 180906 474 0.5+ 0.1+ 180604 G40 0.4+ 0.3- 180616 474 0.1+ 0.1+ ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2018 Oct. 11

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