Nakano Note (Nakano wa Kangaeru noda) NK 4000 P/2015 X6 (PANSTARRS)

The following improved orbital elements, by S. Nakano, are from 46 observations 2015 Nov. 12 to 2016 Mar. 7. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.41 arc second. See the previous orbits in NK 3088 and NK 3427. Epoch = 2016 Apr. 2.0 TT T = 2016 Mar. 18.65508 +/- 0.01089 (m.e.) TT Peri. = 329.02349 +/- 0.00391 Node = 107.11435 +/- 0.00099 (2000.0) Inc. = 4.55802 +/- 0.00005 q = 2.2873063 +/- 0.0000114 AU e = 0.1694747 +/- 0.0000303 a = 2.7540478 +/- 0.0001013 AU n' = 0.21564871 +/- 0.00001190 P = 4.570 +/- 0.0002521 years (+/- 0.09 day) The predicted orbit for the 2020 return is as follows: T = 2020 Oct. 16.96865 TT Epoch = 2020 Sept.28.0 TT Peri. = 329.86599 e = 0.1724638 Node = 106.95009 (2000.0) a = 2.7529369 AU Inc. = 4.56465 n'= 0.21577926 q = 2.2781550 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/ 151209 291 0.6+ 0.7+ 151217 568 0.0 0.0 151112 G45 0.1- 0.2+ 151209 291 1.0+ 0.1- 151217 568 0.0 0.1+ 151112 G45 0.3+ 0.9+ 151209 291 0.5+ 0.6+ 151217 568 0.0 0.1+ 151112 G45 0.1+ 0.2+ 151210 Q62 0.1- 1.1+ 151217 568 0.1+ 0.2+ 151112 G45 0.3- 0.5- 151210 Q62 0.1- 0.9+ 2016/ 151112 G45 0.7- 0.3- 151210 Q62 0.0 1.0+ 160101 568 0.3- 0.1- 151207 F51 0.1+ 0.0 151214 691 0.8+ 0.8+ 160101 568 0.3- 0.1- 151207 F51 0.3+ 0.1- 151214 691 0.4+ 0.1+ 160101 568 0.4- 0.1- 151207 F51 0.2- 0.0 151214 691 0.6+ 0.4+ 160201 568 0.1+ 0.0 151208 H01 0.5+ 0.3+ 151214 K51 0.3+ 0.2+ 160201 568 0.2+ 0.2- 151208 H01 0.1+ 0.1+ 151214 K51 0.4+ 0.3+ 160201 568 0.4+ 0.0 151208 H01 0.0 0.1+ 151214 K51 0.4+ 0.4+ 160307 568 0.9- 0.2+ 151208 H01 0.0 0.3+ 151215 291 1.1+ 0.6+ 160307 568 0.5- 0.5+ 151208 568 0.1- 0.3- 151215 291 0.0 0.1- 160307 568 0.3- 0.6+ 151208 568 0.1- 0.1- 151217 568 0.2- 0.0 160307 568 0.2- 0.6+ 151208 568 0.1- 0.3- 151217 568 0.0 0.0 160307 568 0.5- 0.4+ ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2019 Dec. 29

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