OAA computing section circular NK 1282 173P/Mueller 5 (1993 W1 = 2005 T1)

The following improved orbital elements, by S. Nakano, are from 103 observations 1992 to 2005. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.79 arc second. Epoch = 2008 May 14.0 TT T = 2008 May 18.51718 +/- 0.00638 (m.e.) TT Peri. = 29.83451 +/- 0.00051 Node = 100.56967 +/- 0.00007 (2000.0) Inc. = 16.49587 +/- 0.00003 q = 4.2144795 +/- 0.0000033 AU e = 0.2611486 +/- 0.0000007 a = 5.7040960 +/- 0.0000012 AU n' = 0.07234755 +/- 0.00000002 P = 13.623 +/- 0.0000043 years T = 1994 Sept.12.15713 TT Epoch = 1994 Sept. 5.0 TT Peri. = 30.02185 e = 0.2605278 Node = 100.66247 (2000.0) a = 5.7469880 AU Inc. = 16.46553 n'= 0.07153913 q = 4.2497381 AU P = 13.777 years The predicted orbit for the 2021 return is as follows: T = 2021 Dec. 16.74326 TT Epoch = 2021 Dec. 12.0 TT Peri. = 29.18222 e = 0.2610038 Node = 100.40037 (2000.0) a = 5.7064409 AU Inc. = 16.49265 n'= 0.07230296 q = 4.2170383 AU P = 13.632 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1992/ 931221 658 0.0 0.3- 1995/ 921218 303 0.1- 2.0- 931222 372 0.0 1.4+ 950128 691 1.1- 0.6- 921218 303 0.2+ 0.4+ 931223 385 0.4- 0.5+ 950128 691 1.9+ 0.2+ 921218 303 0.4+ 1.5+ 931223 385 0.9- 0.2+ 950129 691 0.5+ 0.3- 921219 303 (2.9+ 0.6-) 1994/ 950129 691 0.2+ 0.1+ 1993/ 940101 372 1.7- 1.7+ 950129 691 0.8- 0.1- 931120 675 1.0+ 1.9+ 940104 372 0.8+ 0.5- 950131 691 0.4- 0.1- 931121 675 0.5- 2.0+ 940104 897 0.8- 0.6- 950131 691 0.6+ 0.3- 931123 658 0.6- 0.3+ 940104 372 0.4- 0.6- 950131 691 0.2+ 0.3- 931123 658 0.9- 0.0 940104 897 2.0- 1.0+ 950201 691 1.0- 0.2- 931123 658 0.3- 0.0 940104 360 1.2+ 0.1- 2005/ 931123 658 0.2- 0.1+ 940104 897 0.7- 0.9- 051004 A79 0.4- 0.1- 931124 372 0.7- 0.5+ 940104 887 0.2+ 0.2- 051004 A79 1.2- 0.8+ 931125 658 0.3- 0.3- 940104 360 1.4+ 0.2- 051006 A79 0.7+ 1.0- 931125 658 0.4- 0.1- 940104 887 1.3- 1.4- 051006 A79 0.9+ 1.1- 931125 658 0.2- 0.3- 940104 887 1.7- 0.2- 051006 A79 1.9+ 0.5+ 931125 658 0.3- 0.2- 940105 372 0.0 0.4+ 051006 A79 0.7- 0.1+ 931206 372 0.5- 1.1+ 940109 360 0.3+ 0.5+ 051007 699 0.4- 0.8- 931210 691 0.7+ 0.1- 940109 360 0.7+ 0.3+ 051007 699 1.2- 0.7- 931210 691 0.7+ 0.3- 940110 372 0.4+ 0.5- 051007 699 0.9- 0.2- 931210 691 0.6+ 0.6- 940114 658 1.1+ 0.0 051007 G96 0.1- 0.1- 931210 675 (0.2+ 3.4+) 940114 658 0.9+ 0.3+ 051007 699 0.5- 0.3- 931211 360 0.4+ 0.1- 940114 658 1.3+ 0.1+ 051007 G96 0.6+ 0.0 931211 360 0.4- 0.0 940202 887 1.0+ 0.5- 051009 213 0.2- 0.0 931212 385 1.0- 0.3+ 940202 887 0.5- 0.6- 051009 213 0.0 0.1+ 931212 385 1.2- 0.4+ 940203 360 1.3+ 0.2- 051009 213 0.0 0.1+ 931212 385 (2.4- 0.1+) 940203 360 1.2+ 0.0 051009 213 0.0 0.2+ 931212 372 (3.1- 1.4+) 940312 786 0.9+ 1.1+ 051021 213 0.3+ 1.1+ 931214 372 0.0 1.6+ Y 940312 786 0.3+ 0.4+ 051021 213 0.2+ 0.8+ 931215 360 0.2- 0.5+ 940312 786 1.3+ 0.1- 051021 213 0.4+ 0.6+ 931215 360 0.4+ 0.2- 940317 360 1.9+ 0.7- 051021 213 0.3+ 0.4+ 931218 385 1.3- 0.5- 940317 360 1.3+ 1.0- 051021 213 0.6+ 0.3+ 931218 360 0.5- 0.0 940323 786 0.3+ 1.0- 051022 644 0.6+ 0.8- 931218 385 1.8- 0.5- 940330 786 (2.3+ 0.7-) 051022 644 0.8+ 0.9- 931218 360 1.4- 0.0 940403 360 (3.3+ 1.8-) 051022 644 1.0+ 0.9- 931218 887 0.9- 0.1- 940403 360 1.5+ 1.5- 051024 A79 0.6- 0.6+ 931221 658 0.6- 0.1+ 940413 360 1.4+ 0.4- 051024 A79 0.8- 0.9- 931221 658 0.3- 0.2- 940413 360 1.8+ 0.7+ 051024 A79 0.2- 0.1- ( ) -------- Rejected Obs.

Director, Computing Section Syuichi Nakano 2005 Oct. 29

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