OAA computing section circular NK 1644 P/2006 U7 (Gibbs)
The following improved orbital elements, by S. Nakano, are from 52 observations 2006 Oct. 28 to 2007 Jan. 15. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.53 arc second. See orbits on YC 2534 and HICQ 2007. Epoch = 2007 Apr. 10.0 TT T = 2007 Mar. 28.14811 +/- 0.42345 (m.e.) TT Peri. = 12.91325 +/- 0.06146 Node = 57.76077 +/- 0.00106 (2000.0) Inc. = 7.23003 +/- 0.00161 q = 4.4252873 +/- 0.0009999 AU e = 0.6307777 +/- 0.0002930 a = 11.9854294 +/- 0.0008250 AU n' = 0.02375328 +/- 0.00000245 P = 41.494 +/- 0.0042840 years (+/- 1.56 days) The predicted orbit for the 2049 return is as follows: T = 2049 Apr. 26.29817 TT Epoch = 2049 Apr. 29.0 TT Peri. = 13.19760 e = 0.6414699 Node = 57.39561 (2000.0) a = 12.4777293 AU Inc. = 7.22413 n'= 0.02236149 q = 4.4736419 AU P = 44.076 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2006/ 061030 673 0.3+ 0.8+ 061121 G96 0.2- 0.1- 061028 G96 0.0 0.4- 061030 673 0.5+ 0.8+ 061121 G96 0.1- 0.4+ 061028 G96 0.6- 0.2+ 061030 673 0.1- 0.7+ 061126 215 (0.9- 2.5-) 061028 G96 1.0+ 0.2- 061030 673 0.7- 0.4+ 061127 204 0.6- 0.3+ 061028 G96 0.6- 0.3+ 061030 G96 0.2- 0.0 061127 G96 0.4- 0.1- 061028 G96 0.1+ 0.3- 061030 G96 0.5+ 0.1- 061127 G96 0.6+ 0.5- 061028 G96 0.2+ 0.1+ 061030 G96 0.7+ 0.1+ 061127 G96 0.5+ 0.1- 061028 G96 0.7- 0.9- 061030 G96 0.2+ 0.2+ 061127 G96 0.1- 0.1- 061028 G96 0.6+ 0.0 061111 G96 0.5- 0.2- 061127 213 0.4+ 0.0 061028 G96 0.9+ 0.2+ 061111 G96 0.4- 0.1+ 061127 213 0.4+ 0.2- 061028 G96 0.5+ 0.3+ 061111 G96 0.9- 0.2+ 061128 213 0.2+ 0.4- 061028 G96 0.2- 0.1+ 061117 J95 1.1+ 1.3- 2007/ 061028 G96 0.0 0.0 061117 J95 1.3+ 0.4+ 070115 246 1.1+ 0.2+ 061028 G96 0.5+ 0.2+ 061118 J95 0.1+ 0.2- 070115 246 1.0+ 0.2+ 061029 G96 0.3- 0.2- 061118 J95 0.2+ 0.2+ 070115 246 0.3+ 0.1- 061029 G96 0.4- 0.2- 061119 204 0.5- 0.1- 070115 246 0.8- 0.3+ 061029 G96 0.5- 0.9- 061119 204 1.3- 0.1- 070115 246 1.7- 0.1- 061029 734 0.3- 0.2+ 061121 G96 0.4- 0.0 061029 734 1.1- 0.3- 061121 G96 0.0 0.3+ ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2008 July 31