Nakano Note (Nakano wa Kangaeru noda) NK 2771 P/NEAT (2001 Q11 = 2014 R2)
The following improved orbital elements, by S. Nakano, are from 29 observations 2001 to 2014. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.46 arc second. The recovery observations show the residuals of +666" and +184" from the prediction in NK 1895 (= HICQ 2013) with the delta-T correction = -0.68 day (cf. CBET 3971). Epoch = 2014 Apr. 13.0 TT T = 2014 Apr. 22.46513 +/- 0.00180 (m.e.) TT Peri. = 207.39899 +/- 0.00076 Node = 144.91822 +/- 0.00021 (2000.0) Inc. = 19.84652 +/- 0.00004 q = 1.9541997 +/- 0.0000057 AU e = 0.4333984 +/- 0.0000018 a = 3.4489839 +/- 0.0000043 AU n' = 0.15387474 +/- 0.00000029 P = 6.405 +/- 0.0000121 years T = 2001 June 22.35311 TT Epoch = 2001 June 20.0 TT Peri. = 202.27569 e = 0.4502117 Node = 147.01178 (2000.0) a = 3.3679481 AU Inc. = 20.85241 n'= 0.15946155 q = 1.8516583 AU P = 6.181 years [ T = 2007 Nov. 23.93481 TT Epoch = 2007 Dec. 6.0 TT Peri. = 207.17165 e = 0.4342505 Node = 144.99953 (2000.0) a = 3.4454238 AU Inc. = 19.86471 n'= 0.15411329 q = 1.9492467 AU P = 6.395 years ] The predicted orbit for the 2020 return is as follows: T = 2020 Sept.24.99189 TT Epoch = 2020 Sept.28.0 TT Peri. = 207.53117 e = 0.4278717 Node = 144.66927 (2000.0) a = 3.4664808 AU Inc. = 19.76820 n'= 0.15271119 q = 1.9832718 AU P = 6.454 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2001/ 011024 699 0.4- 0.5+ 2014/ 010818 644 0.1+ 0.2+ 011026 608 1.1- 0.5+ 140728 Q62 0.3+ 0.6+ 010818 644 0.0 0.2+ 011026 608 0.2+ 1.0- 140728 Q62 0.6- 0.4- 010818 644 0.2+ 0.1+ 011026 608 0.4- 0.4- 140906 G96 0.1- 0.3- 010822 608 0.3+ 0.2+ 011115 608 0.9+ 0.1+ 140906 G96 0.1+ 0.0 010822 608 0.3- 0.6+ 011115 608 0.5- 0.5+ 140906 G96 0.2- 0.2+ 010825 608 0.3- 0.4- 011122 644 0.5+ 0.6- 140907 H21 0.2+ 0.3- 010825 608 0.4+ 0.5- 011130 608 0.2- 1.3+ 140907 H21 0.2+ 0.6- 011024 699 0.8+ 0.3- 011213 644 0.8+ 0.2+ 140907 H21 0.3+ 0.4+ 011024 699 0.3- 0.5- 011213 644 0.5- 0.3- 011024 699 0.0 0.1- 011213 644 0.1- 0.0 ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2014 Sept. 17