OAA computing section circular NK 1399 P/2005 T3 (Read)

The following improved orbital elements, by S. Nakano, are from 42 observations 2005 Sept. 30 to Nov. 26. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.50 arc second. See an orbit on YC 2491. Epoch = 2006 Jan. 25.0 TT T = 2006 Jan. 13.08677 +/- 4.22768 (m.e.) TT Peri. = 8.21083 +/- 0.29770 Node = 27.99468 +/- 0.00221 (2000.0) Inc. = 6.26158 +/- 0.00573 q = 6.2022963 +/- 0.0024894 AU e = 0.1737756 +/- 0.0008354 a = 7.5067936 +/- 0.0010878 AU n' = 0.04792061 +/- 0.00001042 P = 20.568 +/- 0.0044708 years (+/- 1.63 days) The predicted orbit for the 2026 return is as follows: T = 2026 Aug. 27.00476 TT Epoch = 2026 Aug. 28.0 TT Peri. = 7.38545 e = 0.1732881 Node = 27.57346 (2000.0) a = 7.5625948 AU Inc. = 6.23160 n'= 0.04739121 q = 6.2520871 AU P = 20.797 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2005/ 051011 291 0.3+ 0.0 051106 213 0.2- 0.5- 050930 G96 0.1- 0.1- 051011 291 0.7- 0.1- 051106 213 0.5- 0.5- 050930 G96 0.4+ 0.8- 051011 854 0.7- 0.6+ 051106 213 0.1- 0.4+ 050930 G96 0.5+ 0.0 051011 854 0.6- 0.6- 051106 213 0.1- 0.2+ 050930 G96 0.0 0.8- 051011 854 0.8- 0.3- 051106 213 0.0 0.2+ 051007 691 0.3+ 0.3+ 051011 926 0.6+ 0.3- 051107 215 0.4+ 1.3- 051007 691 0.1+ 0.2+ 051011 926 0.6+ 0.3+ 051126 G96 0.4+ 0.2+ 051007 691 0.3+ 0.0 051021 673 0.1- 0.2+ 051126 G96 0.4+ 0.4+ 051008 291 0.5+ 0.1+ 051021 673 0.1- 0.2+ 051126 G96 0.5+ 0.4+ 051008 291 0.3+ 0.0 051021 673 0.4+ 0.3+ 051126 G96 0.1+ 0.2+ 051008 291 0.2+ 0.1+ 051021 673 0.7+ 0.3+ 051126 213 0.4- 0.2+ 051010 291 0.6- 0.7- 051030 291 0.1+ 0.0 051126 213 0.5- 0.1- 051010 291 1.4- 1.8+ 051030 291 0.2+ 0.0 051126 213 0.7- 0.2- 051010 291 0.3- 0.9+ 051030 291 0.2+ 0.2+ 051011 291 0.1- 0.1+ 051106 213 0.5+ 1.2- ( ) -------- Rejected Obs.

Director, Computing Section Syuichi Nakano 2006 Dec. 4

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