Nakano Note (Nakano wa Kangaeru noda) NK 3427 P/2015 X6 (PANSTARRS)

The following improved orbital elements, by S. Nakano, are from 41 observations 2015 Nov. 12 to 2016 Feb. 1. 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. See the previous orbit in NK 3088. Epoch = 2016 Apr. 2.0 TT T = 2016 Mar. 18.70449 +/- 0.02040 (m.e.) TT Peri. = 329.03942 +/- 0.00719 Node = 107.11482 +/- 0.00106 (2000.0) Inc. = 4.55801 +/- 0.00006 q = 2.2872555 +/- 0.0000194 AU e = 0.1695659 +/- 0.0000451 a = 2.7542890 +/- 0.0000550 AU n' = 0.21562038 +/- 0.00000646 P = 4.571 +/- 0.0001369 years (+/- 0.05 day) The predicted orbit for the 2020 return is as follows: T = 2020 Oct. 17.23633 TT Epoch = 2020 Sept.28.0 TT Peri. = 329.88179 e = 0.1725573 Node = 106.95046 (2000.0) a = 2.7531745 AU Inc. = 4.56465 n'= 0.21575133 q = 2.2780940 AU P = 4.568 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2015/ 151208 568 0.1- 0.3- 151217 568 0.2- 0.0 151112 G45 0.1+ 0.1- 151209 291 0.6+ 0.7+ 151217 568 0.0 0.0 151112 G45 0.4+ 0.6+ 151209 291 1.0+ 0.2- 151217 568 0.0 0.1+ 151112 G45 0.2+ 0.1- 151209 291 0.5+ 0.6+ 151217 568 0.1+ 0.1+ 151112 G45 0.2- 0.8- 151210 Q62 0.1- 1.1+ 151217 568 0.0 0.1+ 151112 G45 0.6- 0.5- 151210 Q62 0.2- 0.9+ 151217 568 0.2+ 0.2+ 151207 F51 0.1+ 0.1- 151210 Q62 0.0 1.0+ 2016/ 151207 F51 0.2+ 0.1- 151214 691 0.8+ 0.8+ 160101 568 0.2- 0.0 151207 F51 0.2- 0.1- 151214 691 0.4+ 0.1+ 160101 568 0.2- 0.0 151208 H01 0.4+ 0.2+ 151214 691 0.6+ 0.4+ 160101 568 0.3- 0.0 151208 H01 0.0 0.1+ 151214 K51 0.3+ 0.3+ 160201 568 0.1- 0.1- 151208 H01 0.0 0.1+ 151214 K51 0.4+ 0.3+ 160201 568 0.1+ 0.2- 151208 H01 0.0 0.2+ 151214 K51 0.4+ 0.4+ 160201 568 0.2+ 0.0 151208 568 0.1- 0.3- 151215 291 1.1+ 0.6+ 151208 568 0.2- 0.1- 151215 291 0.0 0.0 ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2017 Sept. 25

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