Nakano Note (Nakano wa Kangaeru noda) NK 3439 P/2012 G1 (PANSTARRS)

The following improved orbital elements, by S. Nakano, are from 16 observations 2012 Apr. 13 to Apr. 16. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.33 arc second. Epoch = 2012 June 2.0 TT T = 2012 June 2.64429 +/-11.49030 (m.e.) TT Peri. = 286.39887 +/- 3.79085 Node = 282.18777 +/- 0.44700 (2000.0) Inc. = 11.79903 +/- 0.05500 q = 2.6228937 +/- 0.0303165 AU e = 0.3776455 +/- 0.0116493 a = 4.2144688 +/- 0.0219992 AU n' = 0.11391733 +/- 0.00089196 P = 8.652 +/- 0.0677437 years (+/-24.7 days) The predicted orbit for the 2021 return is as follows: T = 2021 Jan. 26.91898 TT Epoch = 2021 Jan. 26.0 TT Peri. = 286.62572 e = 0.3782614 Node = 282.07109 (2000.0) a = 4.2051702 AU Inc. = 11.80942 n'= 0.11429539 q = 2.6145167 AU P = 8.623 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2012/ 120414 I33 0.2+ 0.2+ 120416 291 0.6+ 0.4+ 120413 F51 0.1- 0.0 120414 I33 0.0 0.1+ 120416 F65 0.1- 0.5- 120413 F51 0.1- 0.0 120414 H06 0.3- 0.2- 120416 F65 0.2+ 0.1+ 120413 F51 0.1+ 0.0 120414 H06 1.0- 0.4- 120416 F65 0.1- 0.8- 120413 F51 0.0 0.1- 120416 291 0.0 0.4+ 120416 F65 0.6- 0.2- 120414 I33 0.0 0.2- 120416 291 0.1+ 0.7+ ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2017 Sept. 29

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