OAA computing section circular NK 1172 105P/Singer Brewster 1986J1
The following improved orbital elements, by S. Nakano, are from 111 observations 1986 to 2005, including planetary perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas, Vesta, and non-gravitational effect of style II. The mean residual is +/- 0.77 arc second. See previous orbits in NK 633 and NK 853. Epoch = 2005 Sept.27.0 TT T = 2005 Sept.11.32953 +/- 0.00409 (m.e.) TT Peri. = 46.65265 +/- 0.00109 Node = 192.47128 +/- 0.00010 (2000.0) Inc. = 9.17952 +/- 0.00002 q = 2.0412993 +/- 0.0000026 AU e = 0.4108985 +/- 0.0000005 a = 3.4651065 +/- 0.0000015 AU n' = 0.15280206 +/- 0.00000010 P = 6.450 +/- 0.0000043 years A1 = +0.073 +/- 0.215 A2 = -0.06757 +/- 0.00304 T = 1986 June 8.94448 TT Epoch = 1986 June 19.0 TT Peri. = 45.32993 e = 0.4264759 Node = 193.44956 (2000.0) a = 3.4093124 AU Inc. = 9.30485 n'= 0.15656832 q = 1.9553229 AU P = 6.295 years T = 1992 Oct. 27.25334 TT Epoch = 1992 Oct. 25.0 TT Peri. = 46.65026 e = 0.4137625 Node = 192.61632 (2000.0) a = 3.4570851 AU Inc. = 9.19267 n'= 0.15333418 q = 2.0266729 AU P = 6.428 years T = 1999 Apr. 6.46053 TT Epoch = 1999 Apr. 12.0 TT Peri. = 46.80791 e = 0.4127512 Node = 192.54521 (2000.0) a = 3.4608496 AU Inc. = 9.18759 n'= 0.15308407 q = 2.0323799 AU P = 6.438 years The predicted orbit for the 2012 return is as follows: T = 2012 Feb. 26.16705 TT Epoch = 2012 Mar. 14.0 TT Peri. = 46.67271 e = 0.4092712 Node = 192.41843 (2000.0) a = 3.4717475 AU Inc. = 9.17065 n'= 0.15236383 q = 2.0508612 AU P = 6.469 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1986/ 860727 691 0.4+ 0.9+ 050304 691 0.2+ 0.0 860503 675 0.7- 0.1+ 860727 691 1.1+ 0.5+ 050307 A41 0.2- 0.2+ 860503 675 (3.4+ 2.8-) 860727 691 0.3+ 1.4+ 050307 A41 0.4+ 1.5+ 860505 474 0.7+ 0.6+ 860906 691 0.0 0.4- 050307 A41 (2.4+ 0.6-) 860505 399 1.3+ 1.3+ 860906 691 0.3- 1.7+ 050307 704 1.3+ 0.4+ 860505 474 (1.2- 2.9+) 860906 691 1.3- 0.1- 050307 704 0.8+ 0.4+ 860505 399 (1.6+ 4.1+) 1992/ 050307 704 0.1+ 0.1+ 860506 474 (0.5+ 3.1+) 920401 691 0.0 0.3- 050307 704 0.9- 0.5+ 860506 474 (0.1+ 3.3+) 920401 691 0.7+ 0.1+ 050307 704 0.3+ 0.2+ 860506 372 (2.7- 1.9+) 920404 691 0.4- 1.6- 050308 A61 0.2+ 1.6- 860506 372 0.6- 1.4- 920404 691 1.2- 1.7- 050308 A61 (5.9+ 1.3-) 860508 657 (2.3- 3.4+) 920404 691 0.7- 0.6- 050308 G92 0.1+ 0.0 860508 474 0.5+ 0.0 1993/ 050308 G92 0.3+ 0.2- 860508 474 (3.9+ 0.3+) 930720 691 0.0 0.7+ 050308 G92 0.6+ 0.2- 860508 323 0.5- 0.9+ 930720 691 0.4+ 0.5+ 050308 699 0.8- 0.3+ 860509 801 1.0- 0.9+ 930720 691 0.1+ 0.5+ 050308 699 0.1- 0.3+ 860510 801 1.5- 1.6+ 930724 691 0.4- 1.1+ 050308 699 0.4- 1.0+ 860510 293 (0.3- 3.2+) 930724 691 0.2- 0.8+ 050308 699 0.0 0.2+ 860510 293 0.2- 2.3+ 930816 691 0.1- 0.3+ 050309 G92 0.1+ 0.0 860513 688 (3.4- 3.2-) 930816 691 0.9- 0.4- 050309 G92 0.2+ 0.2- 860513 688 (0.5+ 3.3-) 930816 691 0.5- 0.2+ 050309 G92 0.4- 0.1+ 860514 474 0.1- 1.4- 930916 691 0.8+ 0.5+ 050309 104 1.1+ 0.6- 860514 474 0.2- 1.0- 930916 691 0.1+ 0.6+ 050309 104 0.1+ 0.0 860514 372 (0.9- 2.8+) 930916 691 0.2+ 1.0+ 050309 104 0.0 0.6- 860516 323 (4.5+ 0.8-) 1999/ 050310 844 0.5- 0.8- 860528 323 0.4+ 2.3+ 990213 693 1.5+ 0.5- 050310 844 0.2- 0.0 860529 323 1.4+ 0.5+ 990213 693 0.9+ 0.6- 050310 844 1.3- 0.7+ 860530 323 0.2+ 0.8+ 990213 693 0.7+ 0.6- 050310 844 (0.8+ 2.1+) 860603 801 1.6+ 0.2+ 990412 693 0.4- 1.9- 050310 844 0.7+ 0.2+ 860604 675 0.8- 0.3- 990412 693 0.8- 1.5- 050310 699 0.7+ 0.3+ 860604 323 1.2- 1.5+ 990608 360 0.3- 1.3- 050310 699 0.4+ 0.6+ 860605 801 0.1+ 0.5+ 990608 360 0.3- 0.9- 050310 699 0.1- 1.2+ 860606 707 1.0+ 0.8+ 990611 867 0.1- 0.7- 050310 699 0.1+ 0.8+ 860606 691 1.0+ 0.1+ 990611 867 0.5+ 1.1- 050311 G92 0.0 0.0 860606 691 1.3+ 0.0 990614 704 0.6+ 0.6- 050311 G92 0.3+ 0.3- 860606 675 0.2- 0.7+ 990614 704 0.5+ 1.9- 050311 G92 0.2- 0.2- 860607 691 (0.3- 2.6-) 990614 704 0.2- 1.5- 050311 213 0.9+ 0.5+ 860607 691 (0.3- 2.5-) 990614 704 1.2- 1.1- 050311 213 0.8+ 0.1+ 860607 691 0.4- 2.3- 990614 704 0.2- 0.7- 050312 213 0.4+ 0.6- 860612 707 0.1- 0.5- 2005/ 050312 213 0.2+ 0.4- 860706 691 0.3- 0.2- 050304 691 0.1+ 0.3+ 050312 213 0.3+ 0.5- 860706 691 0.4- 0.0 050304 703 0.2- 0.1- 050313 A02 0.9- 0.8- 860706 691 0.3- 0.5- 050304 703 0.8- 0.3+ 050313 A02 0.1- 0.4- 860708 801 (4.8+ 7.2+) 050304 703 0.3- 0.5+ 050313 A02 1.0- 0.3- 860711 323 (3.5+ 0.0 ) 050304 691 0.3+ 0.4+ 860712 707 0.1+ 1.7+ 050304 703 1.2- 0.5+ ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2005 Mar. 17