OAA computing section circular NK 693 15P/Finlay
The following improved orbital elements, by S. Nakano, are from 33 observations 1967-1996, 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 +/- 0.90 arc second. Epoch = 1995 May 3.0 TT T = 1995 May 5.03929 +/- 0.00429 (m.e.) TT Peri. = 323.54227 +/- 0.00123 Node = 42.04401 +/- 0.00121 (2000.0) Inc. = 3.67360 +/- 0.00005 q = 1.0355481 +/- 0.0000064 AU e = 0.7103051 +/- 0.0000012 a = 3.5746165 +/- 0.0000075 AU n' = 0.14583437 +/- 0.00000046 P = 6.758 +/- 0.0000212 years A1 = +0.246 +/- 0.018 A2 = +0.01813 +/- 0.00013 T = 1967 July 28.21416 TT Epoch = 1967 July 9.0 TT Peri. = 321.75980 e = 0.7019850 Node = 42.62179 (2000.0) a = 3.6251779 AU Inc. = 3.64598 n'= 0.14279404 q = 1.0803573 AU P = 6.902 years T = 1974 July 3.92933 TT Epoch = 1974 July 12.0 TT Peri. = 322.20152 e = 0.6991810 Node = 42.40594 (2000.0) a = 3.6429571 AU Inc. = 3.64972 n'= 0.14174998 q = 1.0958708 AU P = 6.953 years T = 1981 June 19.98939 TT Epoch = 1981 June 5.0 TT Peri. = 322.20332 e = 0.6984207 Node = 42.42715 (2000.0) a = 3.6505141 AU Inc. = 3.64685 n'= 0.14131005 q = 1.1009195 AU P = 6.975 years T = 1988 June 6.07345 TT Epoch = 1988 June 8.0 TT Peri. = 322.27739 e = 0.6994686 Node = 42.36607 (2000.0) a = 3.6414753 AU Inc. = 3.65173 n'= 0.14183651 q = 1.0943776 AU P = 6.949 years The predicted orbit for the 2002 return is as follows: T = 2002 Feb. 7.17302 TT Epoch = 2002 Feb. 15.0 TT Peri. = 323.63678 e = 0.7105126 Node = 41.96565 (2000.0) a = 3.5721503 AU Inc. = 3.67448 n'= 0.14598542 q = 1.0340923 AU P = 6.751 years The following residuals in seconds of arc are from the above orbital elements: 1967/ 740912 691 1.1- 1.1+ 1995/ 670717 387 (6.4+ 2.3+) 741110 691 0.0 0.8+ 951026 691 0.7- 0.4- 670717 387 (7.9+ 0.2-) 741111 801 (2.9- 1.7+) 951026 691 0.7- 0.9- 670807 693 2.0+ 0.2- 741219 691 0.2- 0.8+ 951026 691 0.5+ 0.8- 670807 387 1.8- 0.2- 741223 801 0.6- 1.8+ 951118 691 0.8- 0.5- 670807 387 0.2- 1.5+ 1975/ 951118 691 1.4- 0.5- 670810 387(13.7+ 8.3+) 750107 691 1.4+ 0.8+ 951118 691 0.7- 0.3+ 670811 020 (9.5+ 3.3+) 1981/ 951222 693 1.4+ 0.1- 670811 020 (9.2+ 3.9+) 810507 323 (8.1- 2.6+) 951222 693 1.2+ 0.1- 670815 020 0.3- 0.8- 810508 323 1.1+ 2.3- 951222 693 1.4+ 0.5- 671007 371 0.1- 2.0- 810810 675 1.0+ 1.2+ 951231 691 0.8- 0.0 671007 371 0.2- 1.0- 810811 675 0.1- 1.2- 951231 691 0.5- 0.3- 671008 371 0.6+ 0.5- 810910 675(14.2+ 1.3-) 951231 691 0.5- 0.3- 1974/ 1988/ 1996/ 740718 372 (5.4- 10.2-)Y 880421 474 0.4- 1.1- 960419 691 0.7- 0.6- 740718 372 (4.1- 5.5-) 880421 474 0.6- 0.3+ 960419 691 0.1- 0.7- 740719 372 (4.0- 0.7-) 880422 474 1.1+ 0.5+ 740720 801 0.0 0.6+ 880422 474 (4.2+ 1.7-) ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 1999 Oct. 31