OAA computing section circular NK 1626 15P/Finlay
The following improved orbital elements, by S. Nakano, are from 84 observations 1974 to 2008, 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 +/- 0.89 arc second. See the previous orbits in NK 693 and NK 1203. The correction to the predicted-T for 2008 return in NK 1203 is +0.015 day. Epoch = 2008 June 23.0 TT T = 2008 June 22.56072 +/- 0.00022 (m.e.) TT Peri. = 347.48598 +/- 0.00046 Node = 13.81013 +/- 0.00068 (2000.0) Inc. = 6.81701 +/- 0.00014 q = 0.9699765 +/- 0.0000020 AU e = 0.7213593 +/- 0.0000008 a = 3.4811015 +/- 0.0000035 AU n' = 0.15175012 +/- 0.00000023 P = 6.495 +/- 0.0000098 years A1 = +0.445 +/- 0.019 A2 = +0.02429 +/- 0.00017 T = 1974 July 3.95453 TT Epoch = 1974 July 12.0 TT Peri. = 322.20569 e = 0.6991825 Node = 42.40505 (2000.0) a = 3.6428702 AU Inc. = 3.64977 n'= 0.14175505 q = 1.0958390 AU P = 6.953 years T = 1981 June 19.99582 TT Epoch = 1981 June 5.0 TT Peri. = 322.20672 e = 0.6984231 Node = 42.42627 (2000.0) a = 3.6504398 AU Inc. = 3.64689 n'= 0.14131435 q = 1.1008882 AU P = 6.975 years T = 1988 June 6.07403 TT Epoch = 1988 June 8.0 TT Peri. = 322.27962 e = 0.6994718 Node = 42.36518 (2000.0) a = 3.6414122 AU Inc. = 3.65178 n'= 0.14184019 q = 1.0943472 AU P = 6.949 years T = 1995 May 5.04798 TT Epoch = 1995 May 3.0 TT Peri. = 323.54354 e = 0.7103088 Node = 42.04317 (2000.0) a = 3.5745577 AU Inc. = 3.67363 n'= 0.14583797 q = 1.0355179 AU P = 6.758 years T = 2002 Feb. 7.20126 TT Epoch = 2002 Feb. 15.0 TT Peri. = 323.63694 e = 0.7105174 Node = 41.96482 (2000.0) a = 3.5721070 AU Inc. = 3.67451 n'= 0.14598808 q = 1.0340628 AU P = 6.751 years The predicted orbit for the 2014 return is as follows: T = 2014 Dec. 27.09722 TT Epoch = 2014 Dec. 9.0 TT Peri. = 347.55425 e = 0.7201889 Node = 13.77593 (2000.0) a = 3.4877057 AU Inc. = 6.79908 n'= 0.15131930 q = 0.9758989 AU P = 6.513 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1974/ 2002/ 020215 367 0.8- 0.6- 740718 372(29.9+ 0.6+)Y 020127 349 (0.7- 2.1+) 020215 367 1.0+ 0.1+ 740718 372(31.2+ 5.2+) 020127 349 (6.3+ 2.2-) 020220 340 1.1+ 1.0+ 740719 372(30.8+ 9.7+) 020127 349 (2.8+ 0.3+) 020220 340 0.6+ 1.3+ 740720 801(34.5+ 10.7+) 020127 349 (5.9+ 0.1-) 020220 340 0.4+ 0.3- 740912 691(10.2+ 1.0+) 020127 340 1.6- 1.7+ 020220 340 0.4+ 0.1+ 741110 691 0.4+ 0.3+ 020127 340 1.9- 0.4- 020309 349 0.5+ 0.8+ 741111 801 (2.6- 1.1+) 020127 340 0.8- 1.4- 020309 349 0.5+ 1.1+ 741219 691 0.7+ 0.7- 020130 340 1.2- 0.8+ 020309 349 0.6- 0.9+ 741223 801 0.7+ 0.1+ 020130 340 (2.1- 2.7-) 020309 340 0.4- 1.1- 1975/ 020130 340 (2.5- 3.2-) 020309 340 0.5- 1.2- 750107 691 (4.0+ 1.2-) 020130 340 0.4- 0.7+ 020309 340 1.5- 0.4- 1981/ 020130 340 (2.7+ 1.1+) 020309 340 0.9- 1.1+ 810507 323 (2.0+ 7.6+) 020130 340 0.2+ 0.8+ 020309 340 0.2+ 0.6- 810508 323(11.2+ 2.8+) 020130 340 (0.5+ 3.3-) 020313 340 0.9+ 0.5+ 810810 675 1.1- 1.2+ 020201 372 1.1- 0.7+ 020313 340 0.7- 0.1- 810811 675 2.3- 1.1- 020206 402 0.1+ 0.6+ 020313 340 1.0+ 0.7+ 810910 675 (8.7+ 0.7-) 020206 402 0.6- 1.0+ 020313 340 0.6- 0.1+ 1988/ 020206 402 0.5- 0.7- 020313 340 1.6- 0.3+ 880421 474 0.0 0.8- 020209 349 0.5+ 1.5+ 020316 349 1.0- 0.4+ 880421 474 0.2- 0.6+ 020209 349 0.3+ 1.5+ 020316 349 1.4- 0.2- 880422 474 1.5+ 0.8+ 020209 349 1.2+ 1.0+ 020324 750 1.4+ 0.1+ 880422 474 (4.6+ 1.5-) 020209 340 (2.6- 0.4+) 020324 750 0.5- 0.6+ 1995/ 020209 340 0.7+ 1.0+ 020324 750 (2.4- 0.3+) 951026 691 0.8- 0.2- 020209 340 0.8- 1.0+ 020324 340 1.1- 1.6+ 951026 691 0.7- 0.6- 020209 340 0.3+ 1.5+ 020324 340 1.9+ 1.3- 951026 691 0.4+ 0.6- 020210 349 0.7+ 0.6- 020324 340 (3.6+ 0.1-) 951118 691 1.1- 0.2- 020210 349 0.5+ 0.3- 020330 340 (7.5- 1.6+) 951118 691 1.7- 0.2- 020210 349 1.6+ 0.1+ 020330 340 (6.0- 0.3-) 951118 691 1.0- 0.6+ 020210 349 0.7+ 0.2- 2008/ 951222 693 0.1+ 0.1+ 020211 340 0.5- 1.3+ 080427 D90 1.9- 0.5+ 951222 693 0.0 0.1+ 020211 340 0.8- 0.4+ 080427 D90 1.3- 0.2+ 951222 693 0.1+ 0.3- 020211 340 0.4- 0.1- 080428 D90 0.9- 1.1+ 951231 691 0.9- 0.2+ 020211 340 1.4- 1.1+ 080428 D90 0.5+ 0.2- 951231 691 0.7- 0.1- 020211 372 1.6- 1.6+ 080520 349 1.0+ 0.3+ 951231 691 0.7- 0.1- 020211 372 1.5- 0.7+ 080520 349 0.3+ 0.8- 1996/ 020212 372 1.3- 0.8+ 080526 349 0.3- 0.3+ 960419 691 0.1+ 0.6- 020215 372 1.1+ 1.4+ 080526 349 0.6+ 0.8+ 960419 691 0.7+ 0.7- 020215 367 0.3+ 0.6- ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2008 May 28