OAA computing section circular NK 1283 P/2005 S2 (Skiff)
The following improved orbital elements, by S. Nakano, are from 71 observations 2004 Sept. 7 to 2005 Oct. 10. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.60 arc second. Epoch = 2006 July 4.0 TT T = 2006 June 27.24491 +/- 2.20948 (m.e.) TT Peri. = 229.69713 +/- 0.15445 Node = 161.26950 +/- 0.00140 (2000.0) Inc. = 3.14093 +/- 0.00016 q = 6.3997432 +/- 0.0015882 AU e = 0.1964953 +/- 0.0003644 a = 7.9647863 +/- 0.0005170 AU n' = 0.04384730 +/- 0.00000427 P = 22.478 +/- 0.0021886 years (+/- 0.80 day) The predicted orbit for the 2029 return is as follows: T = 2029 Jan. 21.05014 TT Epoch = 2029 Jan. 24.0 TT Peri. = 229.82495 e = 0.1974342 Node = 161.17572 (2000.0) a = 7.9787746 AU Inc. = 3.14087 n'= 0.04373204 q = 6.4034920 AU P = 22.537 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2004/ 050930 G96 0.6+ 0.6+ 051001 941 0.4+ 0.3+ 040907 691 0.1+ 0.2+ 050930 699 0.9- 1.1- 051001 941 0.3+ 0.1+ 040907 691 0.4- 0.1+ 050930 699 1.9- 1.1- 051002 941 0.1+ 0.8- 040907 691 0.0 0.1+ 050930 J87 0.2- 0.2+ 051002 941 0.6+ 0.4- 040923 691 0.2+ 0.2- 050930 J87 0.5- 0.5+ 051002 941 0.6+ 0.2- 040923 691 0.2+ 0.2- 050930 J87 0.6- 0.6+ 051003 850 0.3+ 0.2- 040923 691 0.0 0.0 050930 118 0.1- 0.4- 051003 850 1.5- 0.8- 041110 695 0.0 0.2- 050930 118 0.4+ 0.4+ 051003 850 0.3- 0.5+ 041111 695 0.1+ 0.0 050930 213 0.3+ 0.9- 051003 850 0.1- 0.2- 2005/ 050930 213 0.5+ 0.5- 051003 850 0.4+ 1.3- 050925 691 0.3- 0.1+ 050930 213 0.5+ 0.4- 051004 850 0.1+ 0.0 050925 691 0.3+ 0.1+ 050930 213 0.8+ 0.4- 051004 850 0.3- 0.1+ 050925 691 0.4+ 0.0 050930 213 0.7+ 0.3- 051004 850 0.1- 0.8- 050929 699 1.4- 0.4- 051001 691 (3.5+ 1.1-) 051004 850 0.3- 0.2+ 050929 699 0.3- 1.1- 051001 691 0.3+ 0.3+ 051004 850 (3.0- 2.9-) 050929 699 0.4- 1.4- 051001 850 (2.0+ 1.9+) 051005 850 (3.6- 1.1+) 050929 699 0.6- 0.9- 051001 691 0.5+ 0.2+ 051005 850 0.7- 0.3+ 050929 A50 0.5- 0.9+ 051001 850 (2.1- 2.1+) 051005 850 1.7- 0.9- 050930 673 0.3+ 0.2+ 051001 372 0.5- 0.6- 051008 A50 0.8- 0.6- 050930 673 0.5+ 0.1+ 051001 372 0.3+ 0.3+ 051008 A50 0.3+ 0.7+ 050930 699 (2.9- 1.0-) 051001 213 0.3+ 1.3+ 051008 A50 0.4+ 0.3- 050930 673 0.3+ 0.1- 051001 213 0.1+ 1.3+ 051008 A50 0.7- 1.0- 050930 673 0.3+ 0.2+ 051001 213 0.2+ 1.1+ 051010 691 0.5+ 0.3+ 050930 699 0.4- 0.1+ 051001 213 0.1+ 1.1+ 051010 691 0.3+ 0.5+ 050930 G96 0.9+ 0.4+ 051001 213 0.2+ 1.0+ 051010 691 0.4+ 0.5+ 050930 G96 0.5+ 0.6+ 051001 213 0.2+ 1.1+ 050930 G96 0.4+ 0.7+ 051001 941 0.5+ 0.4+ ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2005 Oct. 29