Nakano Note (Nakano wa Kangaeru noda) NK 3986 P/2015 X1 (PANSTARRS)

The following improved orbital elements, by S. Nakano, are from 86 observations 2015 Aug. 12 to 2016 Jan. 3. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.40 arc second. See the previous orbits in NK 3031 and NK 3087. Epoch = 2015 Oct. 25.0 TT T = 2015 Oct. 10.68038 +/- 0.00196 (m.e.) TT Peri. = 219.03161 +/- 0.00079 Node = 161.79104 +/- 0.00007 (2000.0) Inc. = 12.16215 +/- 0.00003 q = 2.1035401 +/- 0.0000034 AU e = 0.4204022 +/- 0.0000021 a = 3.6293102 +/- 0.0000143 AU n' = 0.14255024 +/- 0.00000084 P = 6.914 +/- 0.0000409 years The predicted orbit for the 2022 return is as follows: T = 2022 Sept. 6.61513 TT Epoch = 2022 Sept.18.0 TT Peri. = 218.74039 e = 0.4192339 Node = 161.75751 (2000.0) a = 3.6366802 AU Inc. = 12.15179 n'= 0.14211712 q = 2.1120606 AU P = 6.935 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2015/ 151017 G45 0.0 0.6+ 151204 691 0.2+ 1.7+ 150812 F51 0.0 0.1+ 151017 G45 0.1- 0.5+ 151204 691 0.1- 0.6+ 150812 F51 0.0 0.2+ 151101 G45 0.5- 0.5+ 151204 H01 0.3+ 0.2- 150812 F51 0.1+ 0.1- 151101 G45 0.2- 0.1+ 151204 H01 0.5+ 0.0 150812 F51 0.4+ 0.1+ 151101 G45 0.1- 0.0 151204 H01 0.2+ 0.2- 150915 G45 0.4+ 0.2+ 151101 G45 0.0 0.2+ 151204 H01 0.3+ 0.3- 150915 G45 0.3+ 0.1+ 151108 G45 0.1- 0.2- 151204 C10 0.2+ 0.8+ 150915 G45 0.3- 0.3+ 151108 G45 0.1+ 0.9+ 151204 C10 0.1- 0.6+ 150915 G45 0.2+ 0.4- 151108 G45 0.0 0.0 151204 C10 0.3- 0.2+ 150915 G45 0.2- 0.4+ 151108 G45 0.1- 0.2+ 151205 568 0.0 0.1- 150915 G45 0.5- 0.2+ 151201 F51 0.0 0.3- 151205 568 0.0 0.0 150915 G45 0.2+ 0.3+ 151201 F51 0.0 0.3- 151205 568 0.0 0.0 150923 F51 0.0 0.1- 151201 F51 0.0 0.3- 151206 215 0.4- 0.9+ 150923 F51 0.0 0.2- 151201 F51 0.1+ 0.3- 151206 215 0.4- 0.5+ 150923 F51 0.0 0.2- 151202 H01 0.1+ 0.0 151206 215 0.6- 0.1+ 150923 F51 0.1- 0.1- 151202 H01 0.1+ 0.0 151206 958 0.0 1.2+ 151009 703 0.3+ 0.9+ 151202 H01 0.3+ 0.1- 151206 958 1.0+ 1.6+ 151009 703 0.2- 0.4- 151202 H01 0.2+ 0.1- 151208 372 0.1- 0.6+ 151009 703 0.8- 0.1+ 151202 H06 0.3+ 0.0 151208 372 0.6- 1.2+ 151009 703 0.1- 0.4+ 151202 H06 0.1+ 0.4+ 151208 372 0.2+ 0.7+ 151015 703 0.6- 0.5+ 151202 H06 0.0 0.0 2016/ 151015 703 0.1+ 0.0 151202 K51 0.3- 0.3+ 160103 F51 0.2+ 0.0 151015 703 0.5- 0.4- 151202 K51 0.2- 0.2+ 160103 F51 0.0 0.1- 151015 703 1.1- 0.0 151202 K51 0.2- 0.2+ 160103 F51 0.0 0.1+ 151017 G45 0.3- 0.2+ 151203 H01 0.0 0.2- 160103 F51 0.0 0.1+ 151017 G45 0.0 0.2- 151203 H01 0.0 0.1- 160103 F51 0.0 0.0 151017 G45 1.2- 0.5- 151203 H01 0.1+ 0.2- 160103 F51 0.0 0.1+ 151017 G45 0.2+ 0.3- 151203 H01 0.0 0.1- 160103 F51 0.1+ 0.1- 151017 G45 0.0 0.6+ 151204 691 0.2- 0.5+ 151017 G45 0.7- 0.6+ 151204 691 0.2- 0.6+ ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2019 Dec. 18

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