OAA computing section circular NK 850 37P/Forbes
The following improved orbital elements, by S. Nakano, are from 255 observations 1980 to 1999, 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 +/- 0.76 arc second. See an orbit in NK 636. Epoch = 1999 May 22.0 TT T = 1999 May 4.18966 +/- 0.00016 (m.e.) TT Peri. = 310.70535 +/- 0.00012 Node = 334.36651 +/- 0.00009 (2000.0) Inc. = 7.16274 +/- 0.00001 q = 1.4460246 +/- 0.0000009 AU e = 0.5681207 +/- 0.0000002 a = 3.3482148 +/- 0.0000008 AU n' = 0.16087335 +/- 0.00000006 P = 6.127 +/- 0.0000022 years A1 = +0.386 +/- 0.010 A2 = -0.04017 +/- 0.00036 T = 1980 Sept.24.77503 TT Epoch = 1980 Oct. 8.0 TT Peri. = 262.57578 e = 0.5648796 Node = 23.67981 (2000.0) a = 3.3992296 AU Inc. = 4.67054 n'= 0.15726545 q = 1.4790743 AU P = 6.267 years T = 1987 Jan. 1.67513 TT Epoch = 1987 Jan. 5.0 TT Peri. = 262.75478 e = 0.5656734 Node = 23.57254 (2000.0) a = 3.3951099 AU Inc. = 4.67066 n'= 0.15755178 q = 1.4745867 AU P = 6.256 years T = 1993 Mar. 14.67726 TT Epoch = 1993 Apr. 3.0 TT Peri. = 310.54051 e = 0.5680565 Node = 334.45593 (2000.0) a = 3.3496399 AU Inc. = 7.15929 n'= 0.16077069 q = 1.4468552 AU P = 6.131 years The predicted orbit for the 2005 return is as follows: T = 2005 Aug. 1.74844 TT Epoch = 2005 Aug. 18.0 TT Peri. = 329.25869 e = 0.5413564 Node = 315.09920 (2000.0) a = 3.4283690 AU Inc. = 8.95839 n'= 0.15526470 q = 1.5723997 AU P = 6.348 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1980/ 931118 360 1.5+ 0.4+ 990906 071 0.9- 0.1+ 800312 809 0.3- 0.2- 931210 691 1.2+ 1.7+ 990906 071 1.3- 0.5+ 800313 801 0.3+ 0.6+ 931210 691 1.5+ 0.4+ 990906 071 1.6- 0.0 800313 801 (2.6- 0.1-) 931210 691 1.2+ 0.5+ 990906 071 1.3- 0.1+ 800314 809 1.0- 0.2- 931212 360 (2.4+ 0.6+) 990907 706 1.4- 0.8- 800414 805 0.3- 0.5+ 931212 360 (2.1+ 0.4+) 990907 706 0.7- 1.6- 800415 805 0.3- 0.4+ 931215 360 1.9+ 0.8+ 990907 704 1.1+ 0.1- 800416 805 0.2- 0.5- 931215 360 1.3+ 0.5+ 990907 704 0.9- 0.7+ 800418 381 0.1+ 0.3+ 1994/ 990907 143 1.1- 0.7- 800418 381 0.8+ 0.4+ 940107 691 1.0+ 0.1- 990907 143 1.4- 0.6- 800517 801 1.3- 1.3- 940107 691 (2.0+ 0.3+) 990908 699 1.2- 1.1+ 800606 381 0.6- 0.5- 940109 360 1.6+ 0.8+ 990908 704 0.8+ 0.4- 800613 801 (2.3- 0.0 ) 940109 360 1.5+ 1.3+ 990908 704 0.3- 0.4- 800706 474 (4.7- 0.6+) 1999/ 990908 704 0.7- 1.4+ 800706 474 (2.6- 0.3+) 990414 693 (2.1+ 0.1+) 990908 699 1.1- 1.1+ 800903 323 0.8- 0.5- 990416 897 0.1+ 0.5+ 990908 704 0.7- 1.2+ 800917 323 1.7+ 1.1- 990416 897 0.5+ 0.9+ 990908 699 0.5- 0.5+ 1986/ 990426 372 0.3+ 0.8+ 990910 834 0.5- 0.9- 860408 675 1.3+ 1.1- 990426 372 0.5+ 1.5+ 990910 834 1.2- 0.2+ 860408 675 0.1+ 0.3- 990427 372 0.6+ 1.1+ 990912 360 0.7+ 0.1+ 860509 675 0.5+ 0.9- 990427 372 0.5+ 0.5+ 990912 360 0.7+ 0.0 860509 675 0.4+ 0.9- 990429 372 0.7+ 0.2+ 990915 046 0.3+ 0.1- 860609 675 0.7- 0.1+ 990501 897 (2.6+ 0.7+) 990915 046 0.2+ 0.1+ 860609 675 0.8- 0.3+ 990501 897 (3.3+ 0.2+) 990915 046 0.4+ 0.1+ 860610 675 0.7- 0.2- 990509 844 0.4+ 0.8+ 990917 834 (2.6+ 0.6+) 860610 675 0.9- 0.1- 990509 844 1.4+ 1.3+ 990917 834 0.4+ 0.8- 860612 707 1.2- 0.5- 990509 844 0.4+ 0.5+ 990918 750 0.3- 0.1- 1987/ 990513 360 0.7+ 0.5+ 990918 703 0.3+ 0.2+ 870901 691 1.1+ 0.8+ 990513 360 1.0+ 0.5+ 990918 750 0.3+ 0.2- 870901 691 1.0+ 0.7+ 990520 897 0.5- 0.1+ 990918 703 0.0 0.2+ 870901 691 1.0+ 0.7+ 990520 897 0.8- 0.0 990918 750 0.0 0.5- 870901 691 1.3+ 0.5+ 990614 349 (2.8- 0.8-) 990918 703 0.6- 0.5- 870901 691 0.8+ 0.8+ 990614 349 (2.7- 0.2+) 990918 703 0.4- 0.9- 870919 691 0.4+ 0.2+ 990614 349 0.1+ 1.4+ 990919 903 1.3+ 1.5+ 870920 691 0.5- 0.5+ 990621 349 0.1- 0.9- 990919 903 (2.8+ 0.0 ) 870920 691 0.4+ 0.2- 990621 349 0.8+ 0.4+ 990919 903 (2.3+ 0.9-) 871016 691 0.0 0.8+ 990630 355 1.0- 0.4+ 990923 118 0.0 0.2+ 871016 691 0.3+ 0.9+ 990630 355 0.9- 0.1- 990923 118 0.0 0.1+ 871016 691 0.0 0.8+ 990630 355 1.5- 0.3- 990929 703 (3.4- 1.8-) 1993/ 990707 352 1.0- 0.1+ 990929 703 (2.7- 2.6-) 930321 323 (4.9+ 2.3+) 990707 352 1.1- 0.2+ 990929 703 (2.7- 3.2-) 930321 323 0.5- 0.7- 990708 349 1.0- 0.1+ 990929 703 0.5- 0.4- 930321 323 (4.4- 1.1-) 990708 349 0.3+ 0.6+ 990929 867 0.3+ 0.3+ 930327 323 (5.0- 1.5-) 990710 900 0.1+ 0.1+ 990929 867 0.2+ 0.6+ 930327 323 0.1+ 1.1- 990710 900 0.6+ 0.4+ 990929 867 0.2+ 0.4+ 930328 323 1.3- 1.3- 990724 900 1.0- 0.0 991002 699 0.1+ 1.0+ 930416 323 0.2+ 0.7+ 990724 900 0.7- 0.2- 991002 699 0.1+ 0.9+ 930419 323 0.9+ 1.2+ 990724 897 0.8- 0.3- 991002 699 0.3- 0.4+ 930510 413 1.1- 0.6- 990724 897 0.7- 0.6- 991003 360 0.7+ 0.1- 930510 413 1.1- 0.7- 990725 118 (2.1- 0.6-) 991003 360 0.9+ 0.3- 930511 413 1.3- 0.7- 990725 118 (2.5- 0.5-) 991003 360 0.4+ 0.1+ 930511 413 1.3- 0.5- 990729 349 0.7- 0.4- 991004 834 1.0+ 0.1- 930515 411 0.9- 1.6- 990729 349 0.8- 0.8+ 991004 834 0.8+ 0.2+ 930515 411 0.5- 1.4- 990729 349 0.2- 1.4+ 991004 704 (2.4+ 0.6-) 930527 361 (6.1- 5.3-) 990730 118 0.3- 0.7+ 991004 704 0.5+ 0.5- 930527 361 (4.7- 3.3-) 990730 118 0.0 1.0+ 991004 704 0.6+ 0.4+ 930701 413 0.1+ 0.5- 990730 349 0.1+ 0.6+ 991004 704 0.6+ 0.3- 930701 413 0.4- 0.3+ 990808 844 (0.3- 2.3+) 991004 704 1.1+ 0.5- 930721 691 0.9- 0.4- 990808 844 (0.7+ 2.7+) 991004 360 0.5+ 0.3- 930722 360 0.5- 1.0+ 990808 844 (0.1+ 2.9+) 991004 360 0.6+ 0.4- 930722 360 0.9- 0.1- 990811 355 0.9- 0.2- 991004 360 0.7+ 0.2- 930723 691 0.6- 0.0 990811 355 0.7- 0.9- 991007 704 (2.0+ 0.8-) 930731 413 0.9- 1.0+ 990811 355 1.0- 0.6- 991007 704 1.2+ 0.4- 930731 413 0.8- 0.9+ 990817 071 1.4- 0.5+ 991007 704 1.3+ 0.4+ 930811 411 0.8- 1.5- 990817 071 1.1- 0.6+ 991007 704 0.2- 0.3+ 930811 411 0.7- 0.5- 990817 071 1.1- 0.3+ 991007 704 1.1+ 0.3- 930813 691 0.3- 0.4- 990817 071 1.3- 0.0 991009 750 0.9+ 0.7- 930814 557 (2.7- 1.7-) 990817 071 1.0- 0.2+ 991009 750 0.2+ 1.2- 930814 557 1.2- 0.0 990818 349 0.6+ 0.2+ 991009 750 0.3+ 0.9- 930824 360 0.4- 0.5- 990818 349 0.2- 0.5- 991009 900 0.4+ 0.1+ 930824 360 0.5- 1.1- 990818 349 0.6+ 0.3- 991009 900 0.1- 0.5+ 930824 360 0.8+ 0.2- 990819 071 1.0- 0.3- 991010 750 1.7- 0.3+ 930914 691(12.5- 9.6+) 990819 071 0.7- 0.2- 991010 750 1.5+ 0.0 930914 411 (2.1- 0.5-) 990819 071 1.1- 0.2- 991010 750 (2.3+ 0.2-) 930925 816 0.3+ 1.4- 990819 071 0.3- 0.4- 991010 897 0.3+ 1.2- 930925 816 0.0 1.4- 990819 071 0.4- 0.3- 991010 897 0.4+ 0.1+ 930925 360 0.3+ 0.7- 990819 071 1.4- 0.7+ 991019 704 (3.9+ 1.0+) 930925 360 0.1+ 0.8- 990819 071 1.6- 0.5+ 991019 704 (2.1+ 0.5-) 930926 411 0.1+ 1.4- 990820 071 (4.8- 2.2-) 991019 704 1.0+ 1.0- 930926 411 0.1+ 1.2- 990821 071 (3.9- 1.2-) 991019 704 0.7+ 0.4- 930926 411 0.1- 1.0- 990822 352 1.1- 0.5- 991019 046 0.4+ 0.1- 931011 360 1.0+ 0.6+ 990822 352 1.0- 1.2- 991019 046 0.1+ 0.9- 931011 360 0.8+ 0.4+ 990822 352 1.0- 0.4- 991019 046 0.5+ 0.1+ 931011 900 (3.5+ 1.7-) 990822 402 0.1+ 0.2- 991019 046 0.5+ 0.4- 931011 900 (0.8- 2.2-) 990822 402 0.1+ 0.5- 991020 900 0.8+ 0.3+ 931014 675 (0.1- 2.0-) 990822 402 0.3+ 0.4- 991020 900 1.5+ 0.4+ 931014 675 (0.2+ 2.4-) 990822 113 (2.6- 0.1-) 991029 402 1.5+ 0.2+ 931015 675 (0.5+ 2.0-) 990822 113 1.6- 0.0 991029 402 0.8+ 0.3+ 931019 360 1.0+ 0.2+ 990823 844 1.1+ 0.5+ 991029 402 0.3+ 0.2- 931019 360 1.0+ 0.2+ 990823 844 1.2+ 0.4+ 991104 897 (1.2+ 2.1+) 931020 657 0.4+ 0.4- 990823 844 0.0 0.7- 991107 504 0.1- 0.5- 931020 657 0.4- 1.3- 990824 351 (0.0 3.4+) 991107 504 0.4- 0.7- 931020 657 0.4+ 1.5- 990824 351 (0.7- 3.1-) 991108 360 0.6+ 0.4+ 931023 411 1.1+ 0.6- 990824 351 1.6+ 0.6- 991108 360 0.7+ 0.5+ 931023 411 1.1+ 1.3- 990824 351 0.1- 1.7+ 991112 695 0.5+ 0.2- 931024 691 0.2+ 0.1- 990903 118 0.2+ 0.6- 991112 695 0.4+ 0.3+ 931024 691 0.0 0.1- 990903 118 0.5+ 0.5- 991112 695 0.3+ 0.4+ 931024 691 0.4+ 0.0 990904 351 0.9- 1.5+ 991113 587 0.2+ 0.2+ 931024 411 1.6- 0.4+ 990904 351 1.2+ 0.5+ 991113 587 (2.3+ 1.8+) 931024 411 0.0 1.4- 990904 351 (3.5+ 1.8+) 991128 897 1.1+ 0.8+ 931114 411 0.6+ 0.2- 990904 349 1.1- 1.3+ 991130 360 0.5+ 0.8+ 931114 411 0.9+ 0.6+ 990904 897 0.2- 0.1- 991130 360 0.6+ 0.7+ 931114 411 0.9- 0.6- 990904 897 0.5- 0.4- 931118 360 1.6+ 0.4+ 990905 349 0.2- 0.6- ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2002 May 7