OAA computing section circular NK 795 62P/Tsuchinshan 1
The following improved orbital elements, by S. Nakano, are from 153 observations 1971-1998, 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 +/- 0.86 arc second. See an orbit on MPC 30846. Epoch = 1998 Apr. 17.0 TT T = 1998 Apr. 19.05021 +/- 0.00025 (m.e.) TT Peri. = 22.76843 +/- 0.00018 Node = 96.81072 +/- 0.00010 (2000.0) Inc. = 10.49523 +/- 0.00002 q = 1.4958562 +/- 0.0000010 AU e = 0.5766056 +/- 0.0000005 a = 3.5330086 +/- 0.0000015 AU n' = 0.14841816 +/- 0.00000009 P = 6.641 +/- 0.0000041 years A1 = +0.632 +/- 0.029 A2 = +0.01159 +/- 0.00022 T = 1971 Sept.16.22680 TT Epoch = 1971 Sept. 6.0 TT Peri. = 22.75910 e = 0.5772188 Node = 96.85266 (2000.0) a = 3.5299755 AU Inc. = 10.51521 n'= 0.14860949 q = 1.4924071 AU P = 6.632 years T = 1978 May 7.45756 TT Epoch = 1978 May 12.0 TT Peri. = 22.81485 e = 0.5761030 Node = 96.86904 (2000.0) a = 3.5373435 AU Inc. = 10.50258 n'= 0.14814542 q = 1.4994694 AU P = 6.653 years T = 1985 Jan. 2.39323 TT Epoch = 1985 Jan. 15.0 TT Peri. = 22.80591 e = 0.5745423 Node = 96.84255 (2000.0) a = 3.5440199 AU Inc. = 10.48751 n'= 0.14772699 q = 1.5078305 AU P = 6.672 years T = 1991 Aug. 30.54653 TT Epoch = 1991 Aug. 12.0 TT Peri. = 22.79368 e = 0.5763270 Node = 96.84887 (2000.0) a = 3.5345794 AU Inc. = 10.50145 n'= 0.14831923 q = 1.4975058 AU P = 6.645 years The predicted orbit for the 2004 return is as follows: T = 2004 Dec. 7.94632 TT Epoch = 2004 Dec. 21.0 TT Peri. = 22.84797 e = 0.5778108 Node = 96.76844 (2000.0) a = 3.5274584 AU Inc. = 10.50230 n'= 0.14876858 q = 1.4892549 AU P = 6.625 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1971/ 850411 046 (4.1- 2.3+) 980118 954 0.3- 0.0 711220 691 (4.1+ 0.1+) 850411 046 (5.6- 7.7+) 980118 954 0.2- 0.4+ 711221 691 1.9+ 1.9+ 850412 046 1.7+ 2.6+ 980129 360 0.4+ 0.6+ 1972/ 850412 046 (3.6- 5.1+) 980129 360 0.1+ 0.7+ 720121 693 0.9+ 0.1+ 850414 046 (6.7+ 0.1-) 980129 360 0.2+ 0.5+ 720121 693 1.4+ 2.3+ 850414 046 1.1+ 2.5+ 980205 118 0.5+ 0.5+ 720211 691 0.9- 1.6+ 850418 046 (1.3- 2.7-) 980205 118 0.7+ 0.5+ 720211 691 0.8- 1.8+ 850418 046 (7.8+ 2.5-) 980301 118 0.7- 0.1+ 720310 691 0.7+ 1.6+ 850421 801 1.1+ 0.6+ 980301 118 0.4- 0.1+ 720310 691 0.8+ 1.9+ 1991/ 980302 897 0.5- 0.3+ 1978/ 911108 372(11.6- 3.1+) 980302 897 (2.4- 1.9+) 780204 801 1.1+ 0.7+ 911111 372 (9.6- 2.1+) 980302 360 0.9- 0.1- 780308 801 1.0+ 1.3+ 911111 372 (9.9- 2.9+) 980302 360 0.8- 0.2- 1984/ 911111 372 (9.1- 0.9-) 980302 897 1.5- 0.7- 840904 372 (3.8+ 3.4+)Y 911112 372(10.8- 1.6+) 980308 605 0.3+ 0.2+ 840905 675 0.4+ 0.6- 1997/ 980308 605 (3.4+ 4.2-) 840906 675 0.2- 0.8- 971012 691 0.2+ 0.7+ 980309 046 0.1- 0.0 840922 372 (1.1- 4.4-) 971012 691 0.2- 1.7+ 980309 046 0.9- 0.2- 841120 801 0.8- 0.9+ 971012 691 0.2- 0.3+ 980309 046 0.6- 0.2+ 841127 801 0.2- 0.5- 971102 867 0.5+ 0.8+ 980309 504 0.3+ 0.5+ 841205 657 (0.2- 3.0-) 971102 867 0.5+ 0.0 980309 504 0.3+ 0.1- 841218 801 0.4+ 1.8+ 971102 867 0.3- 0.9+ 980309 504 0.9+ 0.9+ 841223 801 1.1+ 0.8+ 971102 867 0.6+ 0.8+ 980309 504 0.2+ 1.0+ 841228 330 (0.2+ 5.2+) 971103 867 (2.1+ 1.2+) 980310 118 1.2- 0.3- 841229 330 2.1- 0.1- 971103 867 1.5+ 0.9- 980310 118 0.5- 0.6- 1985/ 971103 867 (2.3+ 0.3+) 980312 605 0.2- 0.5- 850117 707 0.7+ 0.3+ 971108 696 0.2- 0.3+ 980312 605 1.9- 0.3+ 850117 691 0.2- 0.3+ 971108 696 0.3- 0.2+ 980316 428 (3.7+ 0.6+) 850117 691 0.0 1.1- 971108 696 0.1- 0.3+ 980318 897 1.7+ 0.8- 850117 691 0.0 1.9- 971225 402 0.3- 1.5+ 980318 897 0.3+ 0.3- 850120 691 0.3- 0.2- 971225 402 (0.6- 2.2+) 980318 402 0.2+ 0.8- 850120 691 0.1- 0.1- 971225 402 0.3+ 1.2+ 980318 360 0.5- 0.8- 850120 691 0.6- 0.3+ 971231 691 0.4- 0.9+ 980318 402 1.2- 1.7- 850121 657 0.1- 1.4- 971231 691 1.6- 0.2+ 980318 402 0.0 1.0- 850123 801 1.7+ 0.2- 971231 691 1.2- 0.4+ 980318 360 0.7- 1.1- 850214 657 0.3+ 1.5- 971231 867 0.2+ 0.0 980319 428 1.2+ 0.7- 850215 691 0.7+ 0.2- 971231 867 0.8- 1.0+ 980322 897 0.5+ 0.7- 850216 801 0.0 0.3+ 971231 867 0.9- 0.7+ 980322 897 (2.2+ 0.6+) 850216 502 (1.0- 3.5+) 1998/ 980322 118 0.2- 0.8+ 850217 984 (0.6+ 6.3-) 980102 867 0.1- 1.0+ 980322 118 0.2- 0.3+ 850218 293 1.6+ 0.9- 980102 867 1.1+ 0.8+ 980322 118 0.3- 0.6+ 850223 993 (3.7+ 1.5+) 980110 118 0.8- 1.3- 980410 046 0.4+ 0.6- 850311 657 0.6+ 0.3+ 980110 118 0.0 1.2- 980410 046 0.5+ 0.1+ 850311 657 0.5+ 0.1- 980111 046 0.6- 0.4- 980410 046 0.6+ 0.5- 850312 046 (4.9- 2.1-) 980111 046 0.7- 0.5+ 980419 402 0.9- 1.8- 850312 046 2.0- 0.1+ 980111 046 0.6- 1.0- 980419 402 1.3+ 0.8- 850313 657 0.6- 0.7+ 980118 954 0.2- 0.5+ 980419 402 0.3+ 1.8- 850313 657 (3.2- 0.4+) 980118 954 0.1- 0.1- 980419 360 0.5- 0.4- 850315 657 (2.9+ 1.2-) 980118 954 0.1- 0.0 980419 360 0.7- 0.7- 850315 657 1.5+ 2.3- 980118 954 0.6- 0.1+ 980420 118 0.2+ 0.1- 850315 046 1.1- 0.7- 980118 954 0.3- 0.2- 980420 118 0.1- 0.2+ 850315 046 0.8- 0.8- 980118 954 0.4- 0.0 980423 118 0.5+ 0.1+ 850316 046 (2.1+ 5.5+) 980118 954 0.3+ 0.4+ 980423 118 0.4+ 0.3+ 850316 046 (1.3- 3.5+) 980118 954 0.4- 0.6+ 980427 118 0.2+ 0.2- 850319 801 2.0- 2.1+ 980118 954 0.5- 0.2+ 980427 118 0.5+ 0.0 850320 978 1.2- 1.0+ 980118 954 0.1- 0.1- 980511 118 1.1+ 0.2- 850324 688 0.8- 1.2- 980118 954 0.1- 0.3- 980511 118 0.9+ 0.7- 850324 688 1.4+ 1.1- 980118 954 0.0 0.2- 980515 118 0.1+ 0.6- 850325 801 1.9+ 0.9+ 980118 954 0.1+ 0.4- 980515 118 0.2+ 0.5- 850325 046 2.2- 0.9+ 980118 954 0.4- 0.2+ 980519 360 0.9+ 0.3- 850325 046 0.2+ 0.7+ 980118 954 0.0 0.1- 980519 360 0.8+ 0.1- 850326 801 1.1+ 1.3+ 980118 954 0.5- 0.5- 980526 402 1.0+ 0.4- 850326 046 1.7- 0.2- 980118 954 0.2+ 0.2+ 980526 402 1.1+ 0.1+ 850326 046 2.1- 0.5+ 980118 954 0.2- 0.2+ 980526 402 0.9+ 0.0 ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2001 Apr. 28