Nakano Note (Nakano wa Kangaeru noda) NK 5049 P/PANSTARRS (2015 XG422)
The following improved orbital elements, by S. Nakano, are from 71 observations 2010 to 2017. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.36 arc second. 2010 observations show the residual of +35" mainly for R.A. from an orbit on MPO 521860. The object has passed 0.34 AU from Jupiter on 2010 Nov. 12 UT. See an orbit in CBET 5284 (same orbit). Epoch = 2025 Nov. 21.0 TT T = 2025 Dec. 8.37487 +/- 0.00136 (m.e.) TT Peri. = 43.49257 +/- 0.00026 Node = 178.96552 +/- 0.00002 (2000.0) Inc. = 20.17104 +/- 0.00002 q = 3.0050032 +/- 0.0000008 AU e = 0.3081645 +/- 0.0000002 a = 4.3435226 +/- 0.0000018 AU n' = 0.10887820 +/- 0.00000007 P = 9.052 +/- 0.0000056 years T = 2008 Mar. 27.18204 TT Epoch = 2008 Apr. 4.0 TT Peri. = 60.90568 e = 0.2869197 Node = 181.78845 (2000.0) a = 4.6714603 AU Inc. = 19.86243 n'= 0.09761691 q = 3.3311264 AU P = 10.097 years T = 2016 Dec. 2.09696 TT Epoch = 2016 Nov. 28.0 TT Peri. = 43.61668 e = 0.3097594 Node = 178.98612 (2000.0) a = 4.3326042 AU Inc. = 20.19518 n'= 0.10929003 q = 2.9905394 AU P = 9.018 years The predicted orbit for the 2035 return is as follows: T = 2035 Jan. 9.48253 TT Epoch = 2034 Dec. 24.0 TT Peri. = 43.89997 e = 0.3071405 Node = 178.79511 (2000.0) a = 4.3513938 AU Inc. = 20.15043 n'= 0.10858292 q = 3.0149044 AU P = 9.077 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2010/ 160228 Q55 0.2+ 0.1- 160316 691 0.4- 0.1- 100913 F51 0.4+ 0.2- 160229 F51 0.3- 0.1+ 160331 G96 0.1+ 0.2+ 100913 F51 0.1+ 0.2+ 160229 F51 0.0 0.1+ 160331 G96 0.1- 0.3+ 100915 F51 0.2+ 0.2+ 160229 F51 0.0 0.1+ 160331 G96 0.2+ 0.3+ 100915 F51 0.2+ 0.2+ 160305 Q55 0.2- 0.0 160331 G96 0.3- 0.5+ 100915 F51 0.0 0.4+ 160305 Q55 0.2- 0.1- 160429 F51 0.2+ 0.2+ 100916 F51 0.3- 0.1+ 160305 Q55 0.1+ 0.0 160429 F51 0.2+ 0.4+ 100916 F51 0.0 0.5+ 160307 T09 0.1+ 0.0 160429 F51 0.3+ 0.2+ 100916 F51 0.3- 0.1+ 160307 T09 0.1- 0.0 160429 F51 0.3+ 0.4+ 100916 F51 0.1- 0.1+ 160309 T09 0.1- 0.1+ 160804 W84 0.4+ 0.5+ 101003 F51 0.4- 0.0 160309 T09 0.1- 0.0 160805 W84 0.4+ 0.0 101003 F51 0.1+ 0.3+ 160310 W86 0.1- 0.1- 160814 W84 0.3+ 0.2+ 101003 F51 0.0 0.1+ 160310 W86 0.6- 0.2+ 160815 W84 0.5+ 0.1+ 2015/ 160310 W86 0.1- 0.2+ 2017/ 151213 F51 0.2- 0.5- 160310 W86 0.0 0.1- 170420 F51 0.2+ 0.3+ 151213 F51 0.1+ 0.1- 160311 G96 0.8+ 0.1+ 170420 F51 0.1+ 0.2+ 151213 F51 0.2- 0.2- 160311 G96 0.1+ 0.2- 170420 F51 0.1+ 0.3+ 151213 F51 0.0 0.2- 160311 G96 0.2- 0.4+ 170420 F51 0.3+ 0.2+ 151227 W84 0.3- 0.4- 160311 G96 0.1- 0.1+ 170506 F51 0.3- 0.2- 2016/ 160311 F51 0.4- 0.0 170506 F51 0.1+ 0.1- 160210 F51 0.2+ 0.1- 160311 F51 0.2- 0.2+ 170506 F51 0.0 0.2- 160210 F51 0.2+ 0.0 160311 F51 0.1- 0.3+ 170605 G96 1.3- 0.9- 160210 F51 0.2+ 0.0 160311 F51 0.2- 0.3+ 170605 G96 0.9- 1.0- 160210 F51 0.2+ 0.1+ 160316 691 0.6- 0.2- 170605 G96 1.7- 0.8- 160228 Q55 0.5- 0.0 160316 691 0.5- 0.4+ 170605 G96 1.3- 0.7- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2023 Aug. 8