OAA computing section circular NK 1569 P/2007 T4 (Gibbs)
The following improved orbital elements, by S. Nakano, are from 57 observations 2007 Oct. 12 to 2008 Jan. 1. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.70 arc second. See an orbit on YC 2571. Epoch = 2007 Aug. 8.0 TT T = 2007 July 20.74731 +/- 0.01534 (m.e.) TT Peri. = 42.52642 +/- 0.00465 Node = 37.23347 +/- 0.00342 (2000.0) Inc. = 23.87198 +/- 0.00017 q = 2.0090039 +/- 0.0001034 AU e = 0.6176488 +/- 0.0001897 a = 5.2543423 +/- 0.0004987 AU n' = 0.08183263 +/- 0.00001165 P = 12.044 +/- 0.0017148 years (+/- 0.63 day) The predicted orbit for the 2019 return is as follows: T = 2019 July 28.10284 TT Epoch = 2019 July 16.0 TT Peri. = 42.43175 e = 0.6183106 Node = 37.06298 (2000.0) a = 5.2535408 AU Inc. = 23.85882 n'= 0.08185136 q = 2.0052207 AU P = 12.041 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2007/ 071013 703 0.6- 0.3+ 071023 734 0.7+ 0.2- 071012 703 0.3+ 0.7- 071014 B15 0.5+ 0.4- 071023 734 1.0+ 0.9- 071012 703 0.2- 0.0 071014 B15 0.5+ 0.1+ 071023 734 0.2+ 0.9- 071012 703 0.2+ 0.0 071014 B15 0.2+ 0.3- 071103 850 1.3+ 1.0- 071012 703 1.0- 0.3+ 071014 G96 0.3- 0.2+ 071103 850 1.3- 0.0 071012 703 0.2+ 1.2- 071014 G96 0.4- 0.4+ 071107 734 0.1+ 0.6- 071012 703 0.3- 0.7+ 071014 G96 0.0 0.1- 071107 734 0.9+ 0.9- 071012 703 0.1- 0.5- 071014 G96 0.7- 0.9+ 071107 734 0.1- 0.4+ 071012 703 1.0+ 0.1+ 071014 673 1.6+ 1.1- 071113 703 1.4+ 0.5+ 071012 703 0.6- 0.2+ 071014 673 0.4+ 1.2- 071113 703 0.5- 0.1+ 071012 703 0.3+ 0.5+ 071015 G96 0.4- 0.4+ 071113 703 1.1- 0.0 071012 703 1.6- 0.9+ 071015 G96 0.1+ 0.2- 071117 213 0.8- 1.1+ 071012 703 1.5- 0.3+ 071015 G96 0.2+ 0.2- 071117 213 0.5- 0.3+ 071013 703 0.8+ 0.9+ 071015 G96 1.0- 0.5+ 071117 213 0.8- 0.3+ 071013 703 0.8+ 0.7+ 071015 673 0.2- 0.5- 071231 349 0.4+ 0.1- 071013 703 0.4+ 0.6+ 071015 673 1.1+ 0.8- 071231 349 0.7+ 0.2+ 071013 703 0.9+ 0.2+ 071015 673 0.7+ 1.0- 2008/ 071013 703 1.0- 1.1+ 071015 673 0.6+ 0.6- 080101 349 0.5- 0.2- 071013 703 0.5- 1.2+ 071016 204 0.6+ 0.5- 080101 349 0.1- 0.0 071013 703 1.9- 0.6+ 071022 204 0.0 0.3+ ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2008 Feb. 14