Nakano Note (Nakano wa Kangaeru noda) NK 4667 P/2012 G1 (PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 22 observations 2012 Mar. 27 to May 17. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.42 arc second. Additional observations made on 2012 March and May were reported on the recent 2022 MPECs. Orbit was great improved than it on NK 3439 (= HICQ 2020/2021). Epoch = 2012 Mar. 14.0 TT T = 2012 Mar. 21.51929 +/- 0.15172 (m.e.) TT Peri. = 265.75408 +/- 0.03970 Node = 283.39534 +/- 0.00375 (2000.0) Inc. = 12.17147 +/- 0.00028 q = 2.7947679 +/- 0.0001056 AU e = 0.3298853 +/- 0.0000275 a = 4.1705816 +/- 0.0002326 AU n' = 0.11572019 +/- 0.00000968 P = 8.517 +/- 0.0007126 years (+/- 0.26 day) The predicted orbit for the 2020 and 2029 return is as follows: T = 2020 Sept.30.22589 TT Epoch = 2020 Sept.28.0 TT Peri. = 266.02907 e = 0.3301682 Node = 283.28087 (2000.0) a = 4.1656811 AU Inc. = 12.17654 n'= 0.11592445 q = 2.7903055 AU P = 8.502 years T = 2029 Mar. 26.14005 TT Epoch = 2029 Apr. 14.0 TT Peri. = 266.00827 e = 0.3315795 Node = 283.17473 (2000.0) a = 4.1666508 AU Inc. = 12.16598 n'= 0.11588399 q = 2.7850746 AU P = 8.505 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- 0.3- 120416 F65 0.2+ 0.2- 120327 F51 0.2- 0.1+ 120414 I33 0.0 0.0 120416 F65 0.4+ 0.4+ 120327 F51 0.0 0.1- 120414 I33 0.2- 0.0 120416 F65 0.1+ 0.5- 120327 F51 0.1+ 0.0 120414 H06 0.8- 0.8- 120416 F65 0.5- 0.1+ 120413 F51 0.1+ 0.1+ 120414 H06 1.5- 1.1- 120426 F51 0.0 0.0 120413 F51 0.1+ 0.1+ 120416 291 0.2+ 0.5+ 120517 H06 0.2+ 0.0 120413 F51 0.1+ 0.1+ 120416 291 0.3+ 0.8+ 120517 H06 0.2- 0.0 120413 F51 0.1+ 0.0 120416 291 0.7+ 0.5+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2022 Apr. 1