Nakano Note (Nakano wa Kangaeru noda) NK 3142 P/2015 D2 (PANSTARRS)

The following improved orbital elements, by T. Kobayashi, are from 68 observations 2015 Jan. 19 to 2016 Feb. 5. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.35 arc second. See an orbit in HICQ 2015. Epoch = 2013 Sept.25.0 TT T = 2013 Sept.23.49736 +/- 0.01399 (m.e.) TT Peri. = 291.32531 +/- 0.00244 Node = 163.07557 +/- 0.00010 (2000.0) Inc. = 31.69608 +/- 0.00012 q = 5.5982839 +/- 0.0001233 AU e = 0.5683088 +/- 0.0000344 a = 12.9682595 +/- 0.0010715 AU n' = 0.02110481 +/- 0.00000262 P = 46.701 +/- 0.0057872 years (+/- 2.11 day) The predicted orbit for the 2059 return is as follows: T = 2059 July 5.87489 TT Epoch = 2059 July 6.0 TT Peri. = 292.09757 e = 0.5691205 Node = 162.43944 (2000.0) a = 13.0506709 AU Inc. = 31.51592 n'= 0.02090522 q = 5.6232667 AU P = 47.146 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2015/ 150219 K51 0.1+ 0.2- 150309 215 0.2- 0.2- 150119 F51 0.0 0.2- 150219 958 0.5- 0.2- 150309 215 0.4- 0.2+ 150119 F51 0.4+ 0.3+ 150219 958 0.0 0.3+ 150309 215 0.6- 0.6+ 150119 F51 0.3+ 0.0 150219 958 0.0 0.3- 150316 Q62 0.1+ 0.1- 150119 F51 0.5+ 0.1+ 150220 W96 0.8- 0.2+ 150316 Q62 0.2+ 0.0 150218 F51 0.1+ 0.0 150220 W96 0.3+ 0.3- 150319 474 0.3+ 0.6- 150218 F51 0.0 0.3+ 150220 W96 0.0 0.1- 150319 474 0.2- 0.7- 150218 F51 0.3+ 0.2+ 150222 807 0.4+ 1.1+ 150319 474 0.3- 0.3- 150218 F51 0.5+ 0.1+ 150222 807 0.4+ 0.8+ 150319 474 0.1- 0.5- 150219 807 0.0 0.5- 150222 807 0.0 0.3+ 150409 F51 0.3- 0.2+ 150219 807 0.1+ 0.3- 150222 033 0.2- 0.3- 150409 F51 0.1+ 0.4+ 150219 807 0.0 0.1- 150222 033 0.1- 0.2- 150409 F51 0.1+ 0.1+ 150219 568 0.1- 0.2+ 150222 033 0.1- 0.2- 150409 F51 0.3+ 0.0 150219 568 0.1- 0.3+ 150222 033 0.1- 0.2- 150416 474 0.3+ 0.4- 150219 568 0.2- 0.3+ 150222 033 0.2- 0.0 150416 474 0.6+ 0.4- 150219 F51 0.2+ 0.1+ 150222 033 0.4- 0.2- 150416 474 0.3+ 0.0 150219 F51 0.2+ 0.1+ 150222 033 0.2- 0.0 150416 474 0.0 0.3- 150219 F51 0.3+ 0.2+ 150223 033 0.3- 0.3- 2016/ 150219 F51 0.2+ 0.3+ 150223 033 0.4- 0.5- 160205 F51 0.0 0.0 150219 Q62 0.3+ 0.7- 150223 033 0.1- 0.1+ 160205 F51 0.0 0.0 150219 Q62 0.2+ 0.4- 150223 033 0.4- 0.4- 160205 F51 0.1+ 0.0 150219 Q62 0.0 0.7- 150226 W96 0.0 0.9+ 160205 F51 0.0 0.1+ 150219 K51 0.0 0.1- 150226 W96 0.8- 0.6+ 150219 K51 0.2+ 0.2- 150226 W96 0.1+ 1.6+ ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2016 May 7

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