OAA computing section circular NK 699 77P/Longmore
The following improved orbital elements, by S. Nakano, are from 107 observations 1975-1998, 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 +/- 0.72 arc second. Epoch = 1995 Oct. 10.0 TT T = 1995 Oct. 9.31728 +/- 0.00056 (m.e.) TT Peri. = 195.79661 +/- 0.00014 Node = 15.65626 +/- 0.00008 (2000.0) Inc. = 24.40990 +/- 0.00003 q = 2.3989682 +/- 0.0000018 AU e = 0.3430595 +/- 0.0000005 a = 3.6517281 +/- 0.0000011 AU n' = 0.14123958 +/- 0.00000006 P = 6.978 +/- 0.0000030 years A1 = +0.091 +/- 0.094 A2 = -0.07122 +/- 0.00283 T = 1974 Nov. 4.43849 TT Epoch = 1974 Nov. 9.0 TT Peri. = 196.28113 e = 0.3425487 Node = 15.70320 (2000.0) a = 3.6532193 AU Inc. = 24.40746 n'= 0.14115311 q = 2.4018139 AU P = 6.983 years T = 1981 Oct. 21.77491 TT Epoch = 1981 Oct. 3.0 TT Peri. = 195.91760 e = 0.3430588 Node = 15.70668 (2000.0) a = 3.6525895 AU Inc. = 24.41884 n'= 0.14118962 q = 2.3995366 AU P = 6.981 years T = 1988 Oct. 12.18830 TT Epoch = 1988 Oct. 6.0 TT Peri. = 195.70174 e = 0.3414190 Node = 15.69699 (2000.0) a = 3.6576716 AU Inc. = 24.39253 n'= 0.14089546 q = 2.4088730 AU P = 6.995 years The predicted orbit for the 2002 return is as follows: T = 2002 Sept. 4.72111 TT Epoch = 2002 Sept. 3.0 TT Peri. = 196.44638 e = 0.3581899 Node = 14.97671 (2000.0) a = 3.5984779 AU Inc. = 24.40337 n'= 0.14438624 q = 2.3095395 AU P = 6.826 years The following residuals in seconds of arc are from the above orbital elements: 1975/ 880214 691 0.4+ 0.7- 950402 693 0.2+ 0.1+ 750610 413 0.6+ 0.0 880519 568 (3.4+ 0.5-) 950403 360 1.2+ 0.3+ 750611 413 0.2- 0.4+ 1994/ 950403 360 0.8+ 0.3+ 750709 413 0.3+ 0.2+ 940927 691 2.0- 1.1+ 950419 897 0.8+ 1.1- 750806 413 0.1- 0.5- 940927 691 1.4- 0.2+ 950419 897 1.4+ 0.2+ 750811 809 0.8+ 0.0 940927 691 0.4- 1.2+ 950420 410 1.5+ 0.5- 750811 809 0.5+ 0.4- 940928 691 0.8- 1.5+ 950420 410 1.2+ 0.5- 751004 807 1.6- 0.2- 940928 691 (3.0- 2.1+) 950420 410 0.8+ 0.3- 751004 807 1.5- 0.0 940928 691 1.5- 1.4+ 950420 360 0.3+ 0.0 1981/ 941108 360 0.2+ 0.8+ 950420 360 0.2+ 0.1+ 810102 372 0.1+ 1.7- 941108 360 0.9+ 0.0 950426 801 1.1+ 0.1- 810103 372 0.7- 0.7- 941205 360 0.1+ 1.1+ 950426 801 0.5+ 0.1+ 810103 372 (0.1- 2.5-) 941205 360 0.2+ 1.0+ 950426 360 0.4+ 0.2+ 810108 381 1.5- 0.2+ 941209 691 0.2- 0.7+ 950426 360 0.5+ 0.2- 810206 801 1.0- 1.2- 941209 691 0.6- 1.1+ 950428 801 0.7+ 0.8+ 810606 801 (3.1+ 1.1-) 941209 691 0.4- 0.7+ 950428 801 0.1+ 0.7+ 1982/ 1995/ 950503 118 0.4+ 0.0 820726 474 0.1- 0.6+ 950103 691 1.1- 0.1- 950507 118 0.6+ 0.4- 820726 474 0.4+ 0.1- 950103 691 0.8- 0.3+ 950517 897 0.7+ 1.2+ 1986/ 950129 691 0.9- 0.5- 950517 897 1.6+ 0.4- 861229 691 0.3- 0.5- 950129 691 1.3- 0.0 950518 360 1.0+ 0.3+ 861229 691 1.7+ 0.7+ 950129 691 1.1- 0.5- 950518 360 0.8+ 0.1+ 861229 691 0.0 0.4+ 950210 360 1.1- 0.5- 950526 693 0.7+ 0.9+ 1987/ 950210 360 1.0- 0.6- 950528 801 (2.3+ 0.4-) 871026 691 1.2- 0.7+ 950222 897 0.5- 0.6- 950528 801 (2.5+ 0.9-) 871026 691 0.5- 0.4+ 950222 897 1.0- 0.8- 950528 118 0.0 0.8+ 871103 675 0.2+ 0.3+ 950227 360 0.0 0.6- 950528 118 0.5+ 0.8+ 871103 675 0.3+ 0.2+ 950227 360 0.1+ 0.6- 950601 801 0.1+ 0.2+ 871103 675 0.4+ 0.2- 950308 360 0.2- 0.4- 950601 801 (0.1+ 2.3+) 871103 675 0.3+ 0.1+ 950308 360 0.1- 0.6- 950624 691 0.8- 0.1+ 871119 691 0.9- 0.5+ 950319 359 1.2+ 1.0+ 950624 691 0.6- 0.0 871119 691 0.4- 0.3+ 950319 359 1.6+ 0.5+ 950624 691 0.5- 0.2- 871119 675 0.0 0.4- 950320 897 0.3+ 0.3- 1996/ 871119 675 0.1+ 0.3- 950320 897 0.8- 0.2- 961001 413 0.1- 0.1- 871119 691 0.2- 0.3+ 950322 372 0.1+ 1.0+ 1998/ 871119 675 0.1+ 0.2- 950322 372 1.0- 0.3+ 980916 693 1.0- 2.0+ 871119 691 0.2- 0.6+ 950329 801 0.0 0.4- 980916 693 (1.0- 2.3+) 871119 691 0.5- 0.6+ 950329 801 0.5+ 0.2+ 980916 693 1.0- 1.7+ 871119 691 0.4- 0.7+ 950331 372 0.6- 1.1+ 981122 693 0.2- 0.4+ 1988/ 950331 372 (2.9- 0.3+) 981122 693 0.6- 0.4+ 880214 691 0.1+ 0.5- 950401 801 (2.7+ 1.4-) 981122 693 0.6- 0.3- 880214 691 0.1- 0.8- 950401 801 1.3+ 0.1+ 880214 691 0.1+ 0.6- 950402 693 0.4+ 0.6+ ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 1999 Nov. 1