OAA computing section circular NK 770 33P/Daniel
The following improved orbital elements, by S. Nakano, are from 52 observations 1979-2001, 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 = 2000 June 25.0 TT T = 2000 June 23.46642 +/- 0.00046 (m.e.) TT Peri. = 18.98763 +/- 0.00010 Node = 66.58275 +/- 0.00005 (2000.0) Inc. = 22.41000 +/- 0.00004 q = 2.1572389 +/- 0.0000016 AU e = 0.4635950 +/- 0.0000004 a = 4.0216607 +/- 0.0000010 AU n' = 0.12220696 +/- 0.00000005 P = 8.065 +/- 0.0000031 years A1 = +0.306 +/- 0.047 A2 = +0.07364 +/- 0.00109 T = 1978 July 8.40456 TT Epoch = 1978 June 21.0 TT Peri. = 10.83998 e = 0.5499502 Node = 69.18114 (2000.0) a = 3.6920305 AU Inc. = 20.14164 n'= 0.13893324 q = 1.6615975 AU P = 7.094 years T = 1992 Sept. 1.67235 TT Epoch = 1992 Sept.15.0 TT Peri. = 11.00638 e = 0.5519651 Node = 69.05459 (2000.0) a = 3.6815185 AU Inc. = 20.13601 n'= 0.13952872 q = 1.6494489 AU P = 7.064 years T = 1985 Aug. 4.23882 TT Epoch = 1985 Aug. 3.0 TT Peri. = 10.83766 e = 0.5518057 Node = 69.13723 (2000.0) a = 3.6839140 AU Inc. = 20.14434 n'= 0.13939264 q = 1.6511092 AU P = 7.071 years The predicted orbit for the 2008 return is as follows: T = 2008 July 20.35797 TT Epoch = 2008 Aug. 2.0 TT Peri. = 18.97652 e = 0.4619057 Node = 66.57190 (2000.0) a = 4.0322452 AU Inc. = 22.37532 n'= 0.12172609 q = 2.1697283 AU P = 8.097 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1979/ 920929 691 1.5- 0.7+ 930330 691 1.2- 0.2+ 790202 413 (1.4- 4.1-) 920929 691 1.1- 0.8+ 930422 691 0.5+ 0.4+ 790202 413 1.3- 0.5- 921025 360 (0.8+ 2.2-) 930422 691 0.3- 0.3- 790207 413 0.6- 1.1- 921025 360 0.9+ 1.4- 930422 691 0.2- 0.1+ 1985/ 921025 360 1.1+ 1.4- 930528 691 0.4+ 0.1+ 850727 675 0.8- 1.9+ 921030 411 (3.4+ 2.2+) 930528 691 0.3- 0.7+ 850727 675 1.9- 1.3+ 921030 411 0.7+ 0.2+ 1999/ 850728 675 0.1- 2.0+ 921030 411 (2.2+ 1.0-) 991113 695 1.1- 1.3+ 850728 675 0.8- 1.6+ 921130 360 0.9+ 0.9+ 991113 695 0.1- 1.4+ 850729 675 0.3- 1.4+ 921130 360 1.1+ 0.5+ 991113 695 0.3+ 0.6+ 850729 675 1.1- 1.7+ 921202 691 0.3- 0.0 2000/ 1986/ 921202 691 0.4- 0.3+ 001222 867 0.2+ 0.0 860211 691 0.2+ 1.5- 921202 691 0.1- 0.4+ 001222 867 0.4+ 0.2- 860211 691 0.3- 1.3- 1993/ 001222 867 0.2+ 0.1- 860211 691 0.3- 2.0- 930121 360 1.9+ 0.1+ 2001/ 860307 691 0.4- 0.7- 930121 360 1.5+ 0.8- 010130 867 0.2+ 0.2- 860307 691 0.1+ 0.1+ 930124 691 0.9- 0.5+ 010130 867 1.1+ 0.6+ 860307 691 0.3- 0.8+ 930124 691 0.7- 0.3+ 010130 867 0.8+ 0.8+ 1992/ 930124 691 1.2- 0.2+ 010222 867 0.3+ 1.2+ 920729 372 1.4+ 0.6- 930219 360 (5.7- 3.4-) 010222 867 0.2+ 1.3+ 920808 372 (0.9- 2.2+) 930219 360 (3.7- 3.6-) 010222 867 0.4+ 1.7+ 920809 372 0.1+ 0.4+ 930330 691 1.5- 0.0 920929 691 0.2- 0.8+ 930330 691 0.9- 0.1+ ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2001 Mar. 3