OAA computing section circular NK 1013 157P/Tritton
The following improved orbital elements, by S. Nakano, are from 167 observations 1978 to 2003. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.82 arc second. See a prediction in NK 412R and an orbit in NK 974. Epoch = 2003 Oct. 8.0 TT T = 2003 Sept.24.28529 +/- 0.00120 (m.e.) TT Peri. = 147.41866 +/- 0.00106 Node = 300.73470 +/- 0.00028 (2000.0) Inc. = 7.11818 +/- 0.00006 q = 1.4215188 +/- 0.0000109 AU e = 0.5897081 +/- 0.0000031 a = 3.4646522 +/- 0.0000108 AU n' = 0.15283211 +/- 0.00000072 P = 6.449 +/- 0.0000303 years T = 1977 Oct. 28.39307 TT Epoch = 1977 Oct. 24.0 TT Peri. = 147.28350 e = 0.5872310 Node = 300.92089 (2000.0) a = 3.4792044 AU Inc. = 7.08370 n'= 0.15187425 q = 1.4361078 AU P = 6.490 years [ T = 1984 Apr. 24.24838 TT Epoch = 1984 Apr. 10.0 TT Peri. = 147.19235 e = 0.5860059 Node = 300.95144 (2000.0) a = 3.4834652 AU Inc. = 7.07567 n'= 0.15159569 q = 1.4421341 AU P = 6.502 years ] [ T = 1990 Oct. 20.87004 TT Epoch = 1990 Nov. 5.0 TT Peri. = 147.33278 e = 0.5876989 Node = 300.84651 (2000.0) a = 3.4750723 AU Inc. = 7.09703 n'= 0.15214522 q = 1.4327760 AU P = 6.478 years ] [ T = 1997 Apr. 7.71187 TT Epoch = 1997 Apr. 22.0 TT Peri. = 147.27657 e = 0.5885274 Node = 300.83747 (2000.0) a = 3.4708943 AU Inc. = 7.10513 n'= 0.15242001 q = 1.4281779 AU P = 6.466 years ] The predicted orbit for the 2010 return is as follows: T = 2010 Feb. 20.56046 TT Epoch = 2010 Feb. 13.0 TT Peri. = 148.75703 e = 0.6010328 Node = 300.11142 (2000.0) a = 3.4097741 AU Inc. = 7.27769 n'= 0.15653651 q = 1.3603882 AU P = 6.296 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1978/ 031009 379 0.5- 0.8+ 031024 D83 1.8+ 0.2- 780211 413 0.6- 0.2+ 031009 379 0.7+ 0.5+ 031024 D83 1.5+ 0.7- 780213 413 1.2+ 1.4- 031009 379 0.2- 1.0- 031024 D83 1.0+ 0.3- 780215 413 (5.9+ 3.1-) 031010 J95 0.5+ 0.4- 031025 235 (3.1+ 0.3-) 780310 801 1.2+ 0.6+ 031010 938 1.4- 0.4+ 031025 J95 1.7- 0.4+ 780311 801 0.2- 0.2+ 031010 J95 1.4+ 0.5- 031025 J95 1.8- 0.4+ 780313 801 1.6- 1.3+ 031010 938 0.4- 0.1+ 031025 J95 1.3- 0.1+ 780314 801 0.3+ 0.2+ 031010 J95 0.2- 0.3- 031025 D70 (2.1+ 1.9-) 2003/ 031010 938 0.7- 0.0 031025 D70 (3.0+ 0.8-) 030922 678 (9.2- 6.3+) 031010 938 0.8- 0.4+ 031026 204 0.1- 0.6+ 030922 678(15.5- 8.9+) 031010 938 0.8- 0.0 031026 204 0.5+ 0.7+ 030922 678(15.5- 4.6+) 031010 938 0.3+ 0.1- 031026 204 0.7- 0.6+ 030922 678(12.6- 3.2+) 031010 938 0.7- 0.4+ 031026 204 1.2- 0.3+ 031006 678 1.8- 0.5+ 031010 938 1.5- 0.6+ 031026 204 1.0+ 0.2- 031006 678 (1.1- 2.1+) 031010 938 1.0- 0.1+ 031026 204 (2.3+ 0.8-) 031007 620 1.8+ 0.6- 031010 J95 0.3+ 0.4+ 031026 204 0.7+ 0.1- 031007 620 1.7+ 0.6- 031010 J95 0.8+ 0.5- 031026 204 1.2+ 0.2- 031007 620 1.6+ 0.7- 031010 938 0.6- 0.1+ 031027 H41 0.7- 1.4+ 031007 620 1.6+ 0.8- 031010 J95 0.3+ 0.2- 031027 H41 0.2+ 0.1+ 031007 649 1.2+ 0.3- 031010 J95 1.1+ 0.6- 031027 H41 0.5- 1.4+ 031007 649 1.2+ 0.4- 031010 938 0.9- 0.0 031027 H41 0.4+ 1.0+ 031007 649 1.1+ 0.5- 031010 938 1.6- 0.5+ 031027 H41 0.5- 1.1+ 031007 850 0.8+ 0.7- 031010 938 1.0- 0.3+ 031029 H41 0.6+ 0.5- 031007 673 (3.4+ 1.5-) 031010 938 1.5- 0.5+ 031029 H41 0.2+ 0.6- 031007 673 (4.3+ 1.6-) 031010 938 1.2- 0.5+ 031029 H41 0.1+ 0.2- 031007 673 (3.5+ 1.7-) 031011 620 0.2+ 0.4- 031029 H41 1.0- 0.3- 031007 673 (3.8+ 1.5-) 031013 A32 1.1- 0.8+ 031029 349 0.5- 0.1+ 031007 673 (3.5+ 2.0-) 031013 A32 (4.0- 2.0+) 031029 349 0.3- 0.3- 031007 673 (3.5+ 2.1-) 031013 A32 (4.4- 2.1+) 031029 349 0.5- 0.5- 031008 938 0.3+ 0.2- 031013 A32 (3.9- 1.8+) 031029 349 0.3- 0.2- 031008 938 0.2+ 0.0 031013 A32 1.6- 1.0+ 031101 213 (2.5+ 0.1-) 031008 938 0.2+ 0.2- 031013 850 0.9- 0.0 031101 213 1.4+ 0.0 031008 938 0.1+ 0.1- 031013 850 0.8- 0.6+ 031101 213 0.2- 0.6+ 031008 938 0.1+ 0.1- 031015 850 (2.1- 0.2-) 031101 H41 (2.2+ 2.0+) 031008 938 0.2+ 0.0 031015 850 (7.7- 1.6+) 031101 H41 (3.6+ 0.3-) 031008 938 0.9+ 0.4- 031015 349 (2.5- 1.7+) 031101 H41 1.4+ 0.5- 031008 938 0.4+ 0.4- 031015 349 (2.0- 1.4+) 031101 D83 1.7- 1.2+ 031008 938 0.5+ 0.4- 031015 349 1.5- 0.6+ 031101 D83 1.1- 0.2+ 031008 938 0.5+ 0.2- 031015 349 1.3- 0.4+ 031101 D83 0.1- 0.5+ 031008 938 0.6+ 0.5- 031016 349 (2.7- 0.9+) 031102 232 1.8+ 1.0- 031008 938 0.3+ 0.3- 031016 349 (2.4- 0.9+) 031102 232 0.0 0.3+ 031008 938 0.7+ 0.3- 031016 349 (2.7- 0.8+) 031102 232 0.6+ 0.5- 031008 938 0.4+ 0.3- 031016 349 (2.7- 0.8+) 031103 H41 (3.3+ 2.4-) 031008 349 0.9+ 0.2- 031017 235 0.7+ 0.0 031104 H41 (3.6+ 1.0-) 031008 349 0.5+ 0.0 031017 340 1.4- 1.0+ 031104 H41 (3.9+ 1.5-) 031008 349 0.6+ 0.4+ 031017 340 1.8- 1.0+ 031104 H41 (3.7+ 1.5-) 031008 349 0.3+ 0.3+ 031017 340 1.1- 1.5+ 031104 H41 (1.8+ 2.3-) 031008 349 0.6+ 0.1- 031017 340 1.5- 0.7+ 031104 340 1.4+ 0.9- 031008 340 0.9+ 0.0 031017 340 0.3- 0.6+ 031104 340 (2.0+ 1.8-) 031008 340 0.4+ 0.0 031017 340 1.9- 1.1+ 031104 340 1.4+ 0.6- 031008 340 0.4+ 0.2- 031018 349 (2.5- 1.1+) 031104 340 (3.5- 0.9+) 031008 355 0.5- 0.2+ 031018 349 (2.3- 1.1+) 031105 235 (3.9+ 1.5-) 031008 340 0.9+ 0.1+ 031018 349 1.8- 0.5+ 031113 349 0.1+ 0.4+ 031008 355 0.4- 0.2+ 031018 349 (2.4- 0.7+) 031113 349 0.2- 0.4+ 031008 340 0.5+ 0.1- 031019 372 (6.4- 2.3+) 031113 349 0.8- 0.9+ 031008 340 0.3+ 0.2+ 031021 H41 1.6+ 1.0- 031113 349 0.2+ 0.0 031008 355 0.4- 0.2+ 031021 H41 0.7- 0.2+ 031115 213 (4.2- 0.9+) 031008 355 0.5- 0.2- 031021 H41 1.5+ 0.7- 031115 213 (3.9- 1.1+) 031008 372 0.9+ 0.2- 031022 850 (2.3+ 1.2-) 031115 213 (3.8- 1.3+) 031008 372 0.3+ 0.3- 031022 850 (3.6+ 0.6-) 031117 349 0.8+ 0.1- 031008 D70 1.7+ 0.3- 031022 850 (2.8+ 0.8-) 031117 349 1.0+ 1.1- 031008 372 1.5+ 0.6- 031023 H41 1.7+ 1.6- 031117 349 0.8+ 0.5- 031008 D70 (2.2+ 0.5-) 031023 H41 0.7+ 0.3- 031119 H41 (2.7- 1.5+) 031009 204 1.0+ 0.2+ 031023 349 (2.5- 0.6+) 031119 H41 (3.1- 1.0+) 031009 204 0.6+ 0.5- 031023 349 (2.5- 0.3+) 031119 H41 1.4- 0.7- 031009 204 1.3+ 0.1- 031023 349 (2.1- 0.4+) 031119 H41 (3.0+ 6.0+) 031009 939 1.1- 0.2+ 031023 349 (2.3- 0.4+) 031121 349 0.1- 0.9+ 031009 939 1.3- 0.7+ 031023 360 0.2- 0.2- 031121 349 0.6- 0.4- 031009 939 1.8- 1.0+ 031023 360 0.2+ 0.1- 031121 349 1.7- 0.4- 031009 850 0.1+ 0.1- 031023 360 0.3+ 0.6- 031123 704 (3.0- 2.4+) 031009 850 0.3+ 0.3+ 031024 J95 0.3- 0.3+ 031123 704 (2.8- 2.3+) 031009 355 1.5- 0.5+ 031024 J95 0.9- 0.3+ 031123 704 (6.0- 2.2+) 031009 355 1.4- 0.7+ 031024 J95 0.7- 0.1- 031128 H41 1.2+ 0.1+ 031009 355 1.7- 0.8+ 031024 H41 (3.9+ 2.7-) 031128 H41 0.9+ 1.8- 031009 379 0.8+ 0.2- 031024 H41 1.2+ 1.8- 031128 H41 1.8- 1.7- 031009 379 0.6+ 0.8- 031024 H41 (2.0+ 2.5-) 031129 A32 0.0 0.3- 031009 379 0.5- 0.3- 031024 H41 0.7+ 0.1+ ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2003 Dec. 8