Nakano Note (Nakano wa Kangaeru noda) NK 2986 P/2015 GX (PANSTARRS)

The following improved orbital elements, by S. Nakano, are from 107 observations 2015 Apr. 8 to July 17. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.66 arc second. Epoch = 2015 Sept.15.0 TT T = 2015 Aug. 26.64969 +/- 0.00637 (m.e.) TT Peri. = 108.95093 +/- 0.00309 Node = 235.51544 +/- 0.00087 (2000.0) Inc. = 90.25478 +/- 0.00044 q = 1.9718461 +/- 0.0000552 AU e = 0.8781748 +/- 0.0000657 a = 16.1858665 +/- 0.0005400 AU n' = 0.01513562 +/- 0.00000076 P = 65.118 +/- 0.0032589 years (+/- 1.19 days) The predicted orbit for the 2080 return is as follows: T = 2080 July 6.12397 TT Epoch = 2080 July 15.0 TT Peri. = 108.60468 e = 0.8799336 Node = 235.51546 (2000.0) a = 16.5340132 AU Inc. = 89.98614 n'= 0.01466009 q = 1.9851788 AU P = 67.231 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2015/ 150516 C51 1.3+ 0.9- 150609 C23 0.1+ 1.7- 150408 F51 0.2- 0.1- 150516 C51 0.4- 0.9- 150609 C23 0.3+ 0.5- 150408 F51 0.1+ 0.2- 150516 C51 0.6- 1.5- 150613 C23 0.0 0.8- 150408 F51 0.1+ 0.1- 150516 C51 (2.6+ 0.9-) 150613 C23 0.4+ 0.4- 150408 F51 0.2+ 0.3- 150516 C51 0.6+ 0.8- 150613 C23 0.0 0.5- 150409 V37 0.3- 0.7- 150516 C51 0.8- 0.8- 150617 K25 0.3+ 0.1+ 150409 V37 0.2- 0.6- 150516 C51 0.6+ 0.7- 150617 K25 0.0 0.4- 150409 V37 0.2- 0.8- 150516 C51 1.4- 0.9- 150621 157 0.3+ 0.2+ 150409 568 0.3+ 0.3- 150518 157 0.2+ 1.7- 150621 157 0.0 0.2- 150409 568 0.3+ 0.2- 150518 157 0.3- 1.2- 150621 157 0.0 0.1- 150409 568 0.0 0.6- 150518 157 0.0 1.0- 150624 K25 0.2+ 0.0 150409 461 0.8- 0.1- 150520 V37 0.3+ 1.3- 150624 K25 0.1+ 0.1+ 150409 461 0.9- 0.1- 150520 V37 0.1+ 1.1- 150625 C23 (0.1+ 2.6-) 150409 461 0.6- 0.2+ 150520 V37 0.3+ 1.1- 150625 C23 (2.2- 0.8+) 150410 461 0.2+ 0.4- 150525 157 0.3+ 1.4- 150626 A77 0.0 0.3+ 150410 461 0.1- 0.0 150525 157 0.0 1.3- 150626 A77 0.9+ 0.2- 150410 461 0.2+ 0.1+ 150525 157 0.3+ 1.1- 150627 A77 0.7+ 0.1- 150410 461 0.0 0.3- 150525 V37 0.5+ 0.8- 150627 A77 0.3+ 0.5+ 150410 461 0.3+ 0.6+ 150525 V37 0.3+ 1.2- 150627 A77 0.9+ 0.7+ 150411 461 0.3- 0.3- 150525 V37 0.6+ 0.8- 150630 C23 0.0 0.3- 150411 926 0.1+ 0.3- 150526 H06 0.0 0.9- 150630 C23 0.5- 0.5+ 150411 926 0.1+ 0.2- 150526 H06 0.2+ 0.7- 150630 C23 0.3+ 0.5- 150411 926 0.3- 0.9- 150526 H06 0.6+ 0.5- 150630 C23 0.1- 0.2- 150411 461 0.2- 0.9- 150527 V37 0.3+ 1.0- 150705 A77 0.4- 0.2- 150412 461 0.1+ 0.0 150527 V37 0.2+ 0.9- 150705 A77 0.2- 0.2- 150412 461 0.0 0.0 150527 V37 0.3+ 1.0- 150705 A77 0.9- 0.2- 150506 F51 0.0 0.7+ 150604 K61 0.2+ 0.4- 150707 157 1.0- 0.5- 150506 F51 0.0 0.7+ 150604 K61 0.1+ 0.5- 150707 157 1.1- 0.0 150506 F51 0.1+ 0.7+ 150604 K61 0.2+ 0.5- 150707 157 0.9- 0.3- 150507 F51 0.3- 0.9+ 150606 157 0.6+ 1.0- 150709 C23 (2.2- 0.5+) 150507 F51 0.1- 1.0+ 150606 157 0.4+ 0.9- 150709 C23 0.8- 0.3+ 150507 F51 0.1- 0.9+ 150606 157 0.2+ 0.6- 150709 C23 0.8- 0.2- 150509 157 0.4+ 1.2- 150606 157 0.3+ 0.4- 150710 215 0.8- 0.1- 150509 157 0.0 1.6- 150606 J01 0.7+ 1.1- 150710 215 0.8- 0.2- 150515 C51 1.5+ 1.2- 150606 J01 0.2+ 1.5- 150710 215 0.9- 0.2- 150515 C51 1.1+ 1.2- 150606 J01 (0.2+ 2.1-) 150717 157 1.6- 0.4- 150516 C51 0.2+ 0.6- 150606 J01 0.9+ 0.8- 150717 157 1.6- 0.7- 150516 C51 0.3- 1.9- 150609 C23 0.7+ 0.0 ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2015 July 30

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