OAA computing section circular NK 937 84P/Giclas
The following improved orbital elements, by S. Nakano, are from 262 observations 1931 to 2000, 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 +/- 0.94 arc seconds. Epoch = 1999 Aug. 10.0 TT T = 1999 Aug. 25.13001 +/- 0.00042 (m.e.) TT Peri. = 276.41718 +/- 0.00025 Node = 112.49001 +/- 0.00018 (2000.0) Inc. = 7.28156 +/- 0.00002 q = 1.8458498 +/- 0.0000013 AU e = 0.4936356 +/- 0.0000003 a = 3.6452990 +/- 0.0000010 AU n' = 0.14161340 +/- 0.00000006 P = 6.960 +/- 0.0000028 years A1 = +0.018 +/- 0.016 A2 = -0.00045 +/- 0.00021 T = 1931 Nov. 18.98646 TT Epoch = 1931 Dec. 5.0 TT Peri. = 241.10457 e = 0.5304282 Node = 147.43060 (2000.0) a = 3.4652037 AU Inc. = 9.06138 n'= 0.15279562 q = 1.6271618 AU P = 6.450 years [ T = 1938 July 13.27259 TT Epoch = 1938 July 1.0 TT Peri. = 246.74331 e = 0.5076882 Node = 142.78486 (2000.0) a = 3.5606098 AU Inc. = 8.53708 n'= 0.14669574 q = 1.7529301 AU P = 6.719 years ] [ T = 1945 Apr. 7.83147 TT Epoch = 1945 Apr. 15.0 TT Peri. = 246.90465 e = 0.5062551 Node = 142.69863 (2000.0) a = 3.5683535 AU Inc. = 8.52916 n'= 0.14621848 q = 1.7618563 AU P = 6.741 years ] [ T = 1951 Dec. 31.71321 TT Epoch = 1951 Dec. 20.0 TT Peri. = 246.78030 e = 0.5063642 Node = 142.68481 (2000.0) a = 3.5709661 AU Inc. = 8.52389 n'= 0.14605805 q = 1.7627569 AU P = 6.748 years ] [ T = 1958 Sept.30.54900 TT Epoch = 1958 Oct. 4.0 TT Peri. = 246.81031 e = 0.5046458 Node = 142.61464 (2000.0) a = 3.5759354 AU Inc. = 8.51661 n'= 0.14575369 q = 1.7713547 AU P = 6.762 years ] [ T = 1965 June 30.62879 TT Epoch = 1965 July 19.0 TT Peri. = 246.83631 e = 0.5063968 Node = 142.59673 (2000.0) a = 3.5670384 AU Inc. = 8.52332 n'= 0.14629935 q = 1.7607014 AU P = 6.737 years ] [ T = 1972 Mar. 14.67202 TT Epoch = 1972 Mar. 24.0 TT Peri. = 247.05602 e = 0.5109564 Node = 142.30689 (2000.0) a = 3.5480412 AU Inc. = 8.53753 n'= 0.14747591 q = 1.7351469 AU P = 6.683 years ] T = 1978 Nov. 21.15732 TT Epoch = 1978 Nov. 28.0 TT Peri. = 247.20780 e = 0.5114566 Node = 142.22159 (2000.0) a = 3.5448178 AU Inc. = 8.53932 n'= 0.14767712 q = 1.7317972 AU P = 6.674 years T = 1985 Oct. 1.23309 TT Epoch = 1985 Sept.12.0 TT Peri. = 276.35982 e = 0.4945574 Node = 112.59855 (2000.0) a = 3.6359587 AU Inc. = 7.28736 n'= 0.14215943 q = 1.8377685 AU P = 6.933 years T = 1992 Sept.13.08990 TT Epoch = 1992 Sept.15.0 TT Peri. = 276.48366 e = 0.4932064 Node = 112.52761 (2000.0) a = 3.6441141 AU Inc. = 7.28331 n'= 0.14168247 q = 1.8468136 AU P = 6.956 years The predicted orbit for the 2006 return is as follows: T = 2006 Aug. 7.45519 TT Epoch = 2006 Aug. 13.0 TT Peri. = 276.32674 e = 0.4924123 Node = 112.47446 (2000.0) a = 3.6481164 AU Inc. = 7.28086 n'= 0.14144938 q = 1.8517391 AU P = 6.968 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1931/ 920802 801 (3.0- 1.6-) 991018 867 0.1- 0.2+ 310912 690 0.7+ 0.2- 920802 801 (3.8- 2.9-) 991018 867 0.1- 0.1- 310916 690 0.4- 1.6+ 920824 801 (3.0- 1.9-) 991020 704 0.5- 0.4- 310921 690 0.7- 0.1+ 920824 801 (3.3- 2.2-) 991020 704 0.2- 0.1- 1978/ 920925 801 1.4- 2.0- 991020 704 0.4+ 1.0- 780903 688 (0.0 6.1-) 920925 801 1.2- 0.3+ 991020 704 0.9+ 0.5+ 780908 688 (0.9+ 3.5-)Y 920925 360 0.5- 1.5- 991020 360 0.4+ 0.1- 780910 688 (2.4+ 2.8-) 920925 360 0.7- 1.4- 991020 360 0.3+ 0.4- 780911 688 0.1- 1.2- 920928 691 1.3- 1.5- 991020 402 0.0 0.0 780912 688 1.6+ 1.7- 920928 691 1.8- 1.3- 991020 402 0.2- 0.1- 780913 323 0.7+ 0.1+ 920928 691 1.7- 1.4- 991020 402 0.1+ 0.0 780913 323 (2.6+ 0.9-) 920930 801 0.8- 1.3- 991023 402 0.4+ 0.1+ 780914 801 (3.8+ 0.4-) 920930 801 (1.0- 2.6-) 991023 402 0.5+ 0.2+ 780916 372 (1.1- 2.4+) 921024 801 1.6- 0.4- 991023 897 0.8- 0.5- 780916 323 1.1+ 1.4- 921024 801 1.6- 0.4- 991023 897 0.8- 0.3- 780916 323 0.0 0.9- 921028 801 1.5- 0.7- 991024 897 0.5+ 0.5- 780921 323 1.4+ 1.5- 921028 801 1.6- 0.7- 991024 897 0.3+ 0.3- 780922 323 (0.6+ 2.5+) 921030 897 2.1- 1.0- 991104 704 (2.6+ 1.5-) 780923 688 1.3- 1.9- 921030 897 (3.1- 0.3+) 991104 704 0.0 0.8- 780924 805 0.8+ 0.1- 921102 360 1.2- 0.9- 991104 704 (2.3- 0.8+) 780924 323 0.5+ 0.4- 921102 360 1.3- 1.1- 991104 360 0.5+ 0.1- 780924 210 1.5- 1.2+ 921119 675 (6.3+ 4.9-) 991104 360 0.4+ 0.0 780924 210 1.5+ 1.7+ 921119 675 (4.4+ 4.2-) 991105 352 0.8- 0.2+ 780924 046 1.2+ 2.1- 921120 657 0.3- 1.8- 991105 352 (2.4- 0.8-) 780924 046 (0.8- 2.4-) 921120 657 0.1+ 1.9- 991108 349 0.6+ 0.3- 780925 323 (2.5+ 0.5+) 921120 657 0.9+ 1.8- 991108 349 1.4- 0.3- 780925 046 1.0- 0.8- 921121 411 0.4- 1.5- 991108 349 1.6- 0.6- 780925 046 0.3- 0.4- 921121 411 0.5- 0.8- 991110 360 0.6+ 0.1- 780926 801 0.2- 0.2- 921121 411 0.4- 0.1+ 991110 360 0.5+ 0.2+ 780927 688 (0.6+ 2.3-) 921122 411 1.1- 0.9- 991112 695 0.5+ 0.0 780927 805 1.5+ 0.7+ 921122 411 0.6- 0.0 991112 695 0.5+ 0.0 780929 805 1.2+ 0.9+ 921122 411 0.3- 1.1- 991112 695 0.5+ 0.1+ 780930 688 1.6+ 0.4- 921123 897 0.8- 0.4- 991113 474 1.0- 1.1+ 780930 372 0.7- 0.6- 921123 411 0.9- 0.9- 991113 474 (1.5- 2.5+) 780930 372 (0.1- 2.5+) 921123 897 0.7- 0.4- 991113 474 (1.8- 2.3+) 781002 885 1.3+ 0.5+ 921123 411 1.3- 0.6- 991113 402 0.5+ 0.0 781003 323 0.6+ 0.8- 921124 360 0.4- 1.0- 991113 402 0.5+ 0.1- 781007 805 0.9+ 1.4- 921124 360 0.4- 1.0- 991113 355 0.6- 0.1+ 781007 688 (1.3+ 3.1-) 921125 657 0.6- 0.8- 991113 355 0.3- 0.3+ 781008 805 (2.5+ 0.7-) 921125 657 0.0 1.1- 991113 355 0.4- 0.1+ 781008 885 0.1- 0.6+ 921125 657 0.2- 1.3- 991116 360 0.5+ 0.1+ 781008 046 0.3- 0.1+ 921126 411 0.8- 1.0- 991116 360 0.6+ 0.2+ 781008 046 0.1+ 0.1- 921126 411 0.7- 0.6- 991130 360 0.8+ 0.1+ 781009 805 0.3+ 1.4- 921126 411 0.4- 0.5- 991130 360 0.8+ 0.0 781009 805 1.0+ 0.8+ 921129 801 (0.7- 4.4-) 991130 897 0.6+ 0.3- 781009 046 1.8- 0.8- 921129 801 (0.7- 4.4-) 991130 897 0.7+ 0.5- 781009 046 1.6- 0.7- 921130 360 0.2- 0.7- 991203 808 0.4- 0.6+ 781010 675 0.7+ 1.4+ 921130 360 0.3- 0.9- 991203 808 0.4- 0.3- 781010 688 (2.2+ 3.6-) 921130 589 0.1+ 0.4+ 991203 355 0.1- 0.5+ 781023 372 1.3+ 0.2+ 921130 589 0.4- 0.2- 991203 355 0.5- 0.5+ 781023 372 (0.2+ 3.7-) 921201 691 0.6- 0.7- 991203 355 0.3- 0.3+ 781023 323 0.9+ 0.1+ 921201 691 0.0 0.4- 991206 704 0.6+ 0.6- 781027 323 0.2+ 0.9- 921201 691 1.8+ 0.4- 991206 704 0.6- 0.5- 781028 688 (2.7+ 3.6-) 921204 411 1.4- 0.2+ 991206 704 0.8- 0.3+ 781101 801 0.4- 0.5- 921204 411 0.1+ 1.6- 991206 704 0.9- 0.3+ 781104 805 0.4+ 0.3+ 921204 411 0.7- 0.5- 991206 704 (4.0- 1.0+) 781105 323 0.4- 0.3+ 921217 360 0.2- 0.1- 991206 587 0.1- 0.3- 781120 801 0.4- 1.1- 921219 411 0.8- 0.5+ 991206 587 0.2- 0.3- 781120 688 (1.9+ 3.0-) 921219 411 0.6- 1.6- 991207 349 0.5+ 0.7+ 781120 323 2.1- 0.0 921219 411 0.9- 0.1- 991207 349 0.2- 0.2+ 781220 323 (3.6- 0.5-) 921221 801 0.3- 0.5+ 991207 349 0.5- 0.2+ 781227 688 (0.9+ 4.9-) 921221 801 0.4- 0.7+ 991214 704 1.2+ 0.4+ 781227 474 1.7- 0.0 921222 897 (7.5+ 7.2-) 991214 704 0.4+ 2.0+ 781227 474 0.7+ 1.7+ 921222 411 1.5- 0.6+ 991214 704 0.1- 1.9+ 781229 323 1.4+ 1.5+ 921222 411 0.7- 0.3+ 991214 704 0.6- 1.4+ 1979/ 921222 411 1.1+ 0.4+ 991225 897 0.1- 1.2+ 790124 688 (0.8+ 4.9-) 921222 897 (3.7+ 3.0+) 991225 897 0.2+ 0.5+ 790223 801 0.7- 0.7+ 921223 801 0.1+ 1.1+ 2000/ 790328 801 (0.5- 2.9+) 921225 360 0.5+ 0.2- 000103 349 0.4+ 1.4+ 1985/ 921225 360 0.3+ 0.6- 000103 349 1.4+ 1.5+ 850622 707 (5.1- 6.2-) 921226 107 0.8+ 1.2+ 000104 360 0.4+ 0.8+ 850718 801 (1.6- 5.1+) 921226 107 2.0+ 0.9- 000104 360 0.3+ 0.9+ 850721 801 (3.5- 1.5-) 921227 107 0.8+ 0.3+ 000104 049 1.6+ 0.8+ 850722 372 1.5- 2.2- 921228 107 0.2+ 0.8+ 000104 049 1.6+ 1.0+ 850722 372 (6.1- 3.9-) 921228 107 1.0+ 1.2+ 000104 049 1.7+ 0.7+ 850810 662 1.7- 1.4- 921229 107 0.8+ 1.7+ 000105 704 1.6+ 1.1- 850811 662 (2.4- 1.0-) 1993/ 000105 704 1.5+ 1.7+ 850912 801 1.0+ 1.5- 930101 691 0.0 0.4+ 000105 704 (1.9+ 2.3+) 850914 707 0.2- 0.3- 930101 691 0.2- 0.2+ 000105 704 1.4+ 1.0+ 850917 801 0.2+ 1.4- 930101 691 0.1+ 0.1+ 000105 704 (0.3- 3.9+) 851016 801 0.9+ 1.2- 930112 411 (2.4+ 1.2+) 000106 704 2.1+ 0.0 851018 552 1.6+ 1.3- 930112 411 1.4+ 0.2- 000106 704 1.7+ 0.6+ 851018 552 0.9+ 0.7- 930112 411 0.1- 0.5- 000106 704 0.9+ 0.7+ 851020 707 1.3+ 1.4+ 930119 801 0.2- 1.0+ 000106 704 1.3+ 1.6+ 851109 801 (2.6+ 0.9-) 930119 801 0.1+ 0.6+ 000106 704 (1.8- 5.3+) 851109 293 0.1- 1.8- 930121 360 0.8+ 0.1- 000128 402 0.5+ 0.7+ 851109 293 (3.2- 3.4-) 930121 360 0.6+ 0.7+ 000128 402 0.7+ 0.9+ 851113 657 (3.2- 5.1+) 930125 691 0.4+ 0.2- 000128 402 0.8+ 1.3+ 851119 323 (5.1+ 0.3+) 930125 691 0.2+ 0.1- 000128 360 0.9+ 0.8+ 851202 323 (3.6+ 2.8-) 930125 691 0.7+ 0.1+ 000128 360 0.8+ 0.8+ 851205 323 0.4- 0.5+ 930126 801 0.9- 0.6+ 000202 704 0.1- 0.8+ 851205 046 1.0- 0.3+ 930126 801 1.1+ 0.6+ 000202 704 1.9+ 2.0+ 851205 046 0.7+ 0.7- 930320 360 1.8+ 1.5- 000202 704 (0.8+ 2.8+) 851206 323 0.7+ 1.3+ 930320 360 (4.0+ 1.4+) 000202 704 (1.9+ 2.3+) 851209 657 2.1+ 0.3- 1999/ 000203 704 1.4- 0.3+ 851210 323 1.4+ 0.1- 990912 360 0.7- 0.1- 000203 704 0.6+ 2.0+ 851214 688 (3.3+ 1.3+) 990912 360 1.0- 0.3- 000203 704 1.8+ 0.9+ 851214 688 2.1+ 0.3- 990913 143 (4.4- 0.5-) 000203 049 0.8+ 1.4+ 851215 688 (3.2+ 1.5-) 990913 143 (4.5- 0.3-) 000203 049 1.0+ 1.0+ 851215 801 0.7+ 1.3+ 990913 143 1.7- 0.1+ 000203 049 1.1+ 0.7+ 1986/ 990914 557 1.3- 0.2- 000206 704 (2.9+ 2.0+) 860108 688 (2.3+ 0.1-) 990914 557 1.3- 0.2- 000206 704 1.0+ 2.1+ 860109 801 1.5+ 0.9+ 990914 557 1.3- 0.3- 000206 704 0.9+ 2.0+ 860119 691 0.6+ 0.0 991003 360 0.6+ 0.0 000206 704 1.0+ 1.6+ 860119 691 0.8+ 0.2- 991003 360 0.6- 0.2- 000301 360 1.7+ 1.1+ 860119 691 0.9+ 0.1- 991005 903 0.4- 0.3- 000301 360 1.1+ 0.2+ 1992/ 991005 903 1.7- 1.1- 000304 704 (2.4+ 2.3+) 920630 372(12.4- 4.7-) 991005 903 1.7- 1.0- 000304 704 0.9+ 0.8+ 920707 372 (7.2- 2.5-) 991010 704 1.4- 0.1+ 000304 704 2.2+ 1.3+ 920707 372 (6.9- 4.1-) 991010 704 0.8- 0.2+ 000304 704 1.9+ 0.8+ 920709 372 (3.2- 2.6-) 991010 704 1.3- 0.2- 000501 695 0.2+ 0.1+ 920709 372 (3.4- 4.3-) 991010 704 1.5- 0.2- 000501 695 0.8+ 0.2+ 920728 801 (4.7- 1.1-) 991018 629 1.9- 0.1+ 000501 695 1.2+ 0.3+ 920728 801 (3.7- 1.6-) 991018 867 0.1- 0.0 ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2003 Apr. 20