Nakano Note (Nakano wa Kangaeru noda) NK 5127 P/Elenin (2011 NO1 = 2023 WM26)
The following improved orbital elements, by S. Nakano, are from 83 observations 2011 to 2023. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.57 arc second. Identification with 2023 WM26 found by M. Meyer. Residuals for 2023 October observations were +212" for Right Ascension and -80" for Declination from the prediction in NK 4403 with delta-T correction = -0.25 day. Epoch = 2024 May 10.0 TT T = 2024 May 5.24376 +/- 0.00030 (m.e.) TT Peri. = 263.52545 +/- 0.00025 Node = 295.83316 +/- 0.00005 (2000.0) Inc. = 15.39788 +/- 0.00007 q = 1.2437060 +/- 0.0000057 AU e = 0.7788318 +/- 0.0000009 a = 5.6233495 +/- 0.0000354 AU n' = 0.07391140 +/- 0.00000070 P = 13.335 +/- 0.0001258 years (+/- 0.05 day) T = 2011 Jan. 20.10092 TT Epoch = 2011 Feb. 8.0 TT Peri. = 263.42253 e = 0.7791494 Node = 296.11826 (2000.0) a = 5.6190099 AU Inc. = 15.40137 n'= 0.07399705 q = 1.2409620 AU P = 13.320 years The predicted orbit for the 2037 return is as follows: T = 2037 Sept.13.28402 TT Epoch = 2037 Sept.19.0 TT Peri. = 265.61567 e = 0.7776549 Node = 293.74319 (2000.0) a = 5.6133952 AU Inc. = 15.74350 n'= 0.07410810 q = 1.2481107 AU P = 13.300 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2011/ 110712 H21 0.7+ 0.2+ 110802 F51 0.3- 0.1+ 110612 F51 0.3+ 0.3- 110712 H36 (9.1- 3.7+) 110802 F51 0.5- 0.2+ 110612 F51 0.4+ 0.0 110712 H36 1.5- 1.5+ 2023/ 110707 H15 (1.1+ 2.3+) 110712 E10 0.3- 0.7- 231017 F51 0.1- 0.1+ 110707 H15 1.0+ 1.7+ 110712 E10 0.2- 0.3- 231017 F51 0.0 0.3- 110707 H15 0.7- 0.9+ 110712 E10 0.0 0.2- 231024 F51 0.0 0.1- 110707 H15 (2.6- 0.3+) 110712 E10 0.0 0.1- 231024 F51 0.2- 0.0 110707 H15 1.3- 0.1- 110713 F65 0.1- 1.8+ 231024 F51 0.1- 0.1- 110707 H15 (4.3- 0.7-) 110713 F65 0.3- 1.9+ 231112 F52 0.2+ 0.1+ 110707 H15 0.3- 0.9- 110713 F65 (0.8- 2.1+) 231112 F52 0.4+ 0.7- 110709 H21 0.5- 0.6+ 110714 I89 (3.1- 1.5+) 231112 F52 0.5+ 0.4- 110709 H21 0.4- 0.8+ 110714 I89 (2.6- 1.3+) 231118 F52 0.1- 0.0 110709 H21 0.3- 0.0 110717 673 0.1- 0.1- 231118 F52 0.1- 0.0 110709 H21 0.5- 0.2- 110717 673 0.9- 0.9+ 231118 F52 0.1- 0.0 110709 H21 0.5- 0.4- 110718 H21 0.3- 0.4+ 231207 F52 0.1- 0.2+ 110709 H36 0.5+ 0.4- 110718 H21 0.5- 0.1- 231207 F52 0.3+ 0.1+ 110709 H15 0.4+ 0.1+ 110718 H21 0.5- 0.6+ 231207 F52 0.2+ 0.1+ 110709 H15 0.2+ 0.1- 110719 H06 0.3+ 0.3- 231213 F52 0.3+ 0.0 110709 H36 1.0- 0.3+ 110719 H06 0.1- 0.3+ 231213 F52 0.1- 0.2+ 110709 H15 0.5- 0.7- 110720 H06 (2.8- 1.2+) 231213 F52 0.1- 0.1+ 110709 H36 0.6- 0.2+ 110720 H06 (3.5- 0.4+) 231213 F52 0.2- 0.2+ 110710 H21 0.2+ 0.8+ 110722 J01 0.0 0.3+ 231218 Y89 0.5+ 0.3+ 110710 H21 0.0 0.9+ 110722 J01 0.3- 0.8+ 231218 Y89 0.1- 0.4+ 110710 H21 0.2- 1.4+ 110722 J01 0.0 0.9+ 231218 Y89 0.1+ 0.1- 110711 H21 0.4+ 1.8+ 110723 H15 0.3- 0.2+ 231223 X07 0.2+ 0.3+ 110711 H21 1.1+ 1.4+ 110723 H15 0.6- 0.5+ 231223 X07 0.0 0.3+ 110711 H15 0.7+ 0.4+ 110725 H06 0.2+ 0.4- 231224 F52 0.2+ 0.0 110711 H15 0.4+ 0.4+ 110725 H06 0.4+ 1.3- 231224 F52 0.1- 0.1+ 110712 204 0.1- 0.2- 110727 H15 0.1- 1.3- 231224 F52 0.1- 0.2+ 110712 204 0.0 0.1+ 110727 H15 0.8+ 1.1- 231224 F52 0.0 0.3+ 110712 H21 0.0 0.3- 110729 H06 0.9- 0.4+ 110712 H21 0.2+ 0.2- 110729 H06 0.6- 0.4- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2024 Jan. 1