OAA computing section circular NK 840 56P/Slaughter-Burnham
The following improved orbital elements, by S. Nakano, are from 77 observations 1958 to 1997. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.84 arc second. Epoch = 1993 June 22.0 TT T = 1993 June 22.41944 +/- 0.00035 (m.e.) TT Peri. = 44.10771 +/- 0.00029 Node = 346.44478 +/- 0.00028 (2000.0) Inc. = 8.15589 +/- 0.00003 q = 2.5430847 +/- 0.0000011 AU e = 0.5035611 +/- 0.0000002 a = 5.1226543 +/- 0.0000006 AU n' = 0.08500833 +/- 0.00000002 P = 11.594 +/- 0.0000021 years T = 1958 Sept. 5.22143 TT Epoch = 1958 Aug. 25.0 TT Peri. = 44.35573 e = 0.5039267 Node = 346.96293 (2000.0) a = 5.1277972 AU Inc. = 8.17179 n'= 0.08488048 q = 2.5437633 AU P = 11.612 years T = 1970 Apr. 13.35126 TT Epoch = 1970 Apr. 4.0 TT Peri. = 44.28540 e = 0.5041329 Node = 346.80011 (2000.0) a = 5.1297973 AU Inc. = 8.16560 n'= 0.08483084 q = 2.5436977 AU P = 11.619 years T = 1981 Nov. 19.12510 TT Epoch = 1981 Nov. 12.0 TT Peri. = 44.19489 e = 0.5038872 Node = 346.63153 (2000.0) a = 5.1289952 AU Inc. = 8.15967 n'= 0.08485074 q = 2.5445600 AU P = 11.616 years The predicted orbit for the 2005 return is as follows: T = 2005 Jan. 15.02067 TT Epoch = 2005 Jan. 30.0 TT Peri. = 44.09661 e = 0.5038670 Node = 346.27165 (2000.0) a = 5.1099700 AU Inc. = 8.15551 n'= 0.08532505 q = 2.5352246 AU P = 11.551 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1958/ 811225 010 (4.6- 1.0-) 931114 360 0.3+ 0.2+ 581210 690 (3.1- 3.2-) 1982/ 931118 360 0.3+ 0.4+ 581211 690 1.6- 2.0- 820120 010 (7.4- 1.1-) 931118 360 0.2+ 0.7+ 581212 690 (5.1- 2.4-) 1992/ 931119 557 0.1- 0.3+ 581213 690 (3.8- 1.9-) 920924 693 1.2- 0.1+ 931119 557 0.1- 0.3+ 581215 690 1.9- 0.1- 920924 693 0.6- 1.0+ 931119 557 0.4- 0.4+ 1959/ 920924 693 0.0 0.1- 931120 557 0.4- 0.1- 590202 689 0.3+ 0.4- 920924 693 0.9- 0.4- 931207 411 0.1- 0.2+ 590202 689 0.7+ 0.4- 920925 693 0.7- 0.3- 931207 411 0.6- 0.1- 590206 689 0.1+ 0.9- 920925 693 0.5- 0.1- 931207 411 0.4+ 0.5+ 590206 689 0.3+ 0.7- 920925 693 0.7- 0.7- 931211 897 1.4- 1.6- 590226 689 1.0+ 1.0+ 920925 693 0.2- 0.4- 931211 897 (3.8- 1.1-) 590226 689 1.3+ 1.1+ 920925 693 0.8- 0.1+ 931211 897 1.4- 0.4- 590303 662 2.6- 0.3+ 920925 693 0.5- 0.0 931212 360 0.1+ 0.5+ 590303 662 0.7- 1.4- Y 1993/ 931212 360 0.0 0.3+ 590308 689 0.6+ 0.2+ 930722 691 1.6- 0.0 1994/ 590401 689 0.4- 0.4- 930722 691 1.0- 0.1- 940102 897 (0.5+ 3.6-) 590409 689 1.0+ 1.3+ 930722 691 (2.2- 0.2+) 940102 897 (3.1+ 2.7-) 1969/ 930725 691 0.6- 0.3- 940102 897 0.0 1.1- 691104 691 0.2- 0.7- 930814 691 0.1+ 0.1- 940104 360 1.6+ 0.3+ 691105 691 0.9+ 0.6+ 930824 360 0.8- 0.1+ 940104 360 1.5+ 0.0 691105 691 0.7+ 0.4+ 930824 360 0.7- 0.1+ 940203 360 1.0+ 0.2- 1981/ 930827 360 1.2- 0.3- 940203 360 1.2+ 0.0 810709 801 (1.0+ 3.0+) 930827 360 0.4- 0.2- 940302 360 1.1+ 0.2- 810710 801 (0.4- 4.0+) 931011 360 0.1+ 0.8+ 940302 360 1.6+ 0.6- 810728 801 0.8+ 0.4+ 931011 360 0.3- 0.7+ 1997/ 810826 801 1.9+ 1.5+ 931011 360 0.6- 0.2+ 970416 568 1.2+ 0.4- 810925 801 (0.2+ 5.6+) 931019 360 0.4- 0.6+ 970416 568 1.5+ 0.6- 811002 557 (3.6- 7.9-)Y 931019 360 0.6- 0.4+ 970416 568 0.7+ 0.3- 811031 801 (2.9+ 4.7+) 931020 657 1.8- 0.4+ 970416 568 1.7+ 0.1- 811119 049 (4.8+ 0.5+) 931020 657 (2.5- 1.4+) 970416 568 0.4- 1.3+ 811123 801 1.0+ 1.2+ 931020 657 (3.8- 1.0+) 971230 568 0.6+ 0.2- 811126 049 2.8+ 1.1+ 931108 658 0.1- 0.1+ 971230 568 0.3+ 0.1+ 811129 707 2.5+ 0.8+ 931108 658 0.1- 0.1+ 971230 568 0.2+ 0.2- 811220 801 (3.1+ 1.0+) 931114 360 0.1+ 0.1- ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2002 May 5