OAA computing section circular NK 1204 33P/Daniel
The following improved orbital elements, by S. Nakano, are from 71 observations 1979 to 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 +/- 0.83 arc second. See previous orbits in NK 656 and NK 770. Epoch = 2000 June 25.0 TT T = 2000 June 23.46641 +/- 0.00040 (m.e.) TT Peri. = 18.98774 +/- 0.00010 Node = 66.58267 +/- 0.00004 (2000.0) Inc. = 22.41008 +/- 0.00003 q = 2.1572387 +/- 0.0000014 AU e = 0.4635952 +/- 0.0000003 a = 4.0216621 +/- 0.0000009 AU n' = 0.12220689 +/- 0.00000004 P = 8.065 +/- 0.0000027 years A1 = +0.251 +/- 0.042 A2 = +0.07256 +/- 0.00104 T = 1978 July 8.40247 TT Epoch = 1978 June 21.0 TT Peri. = 10.83943 e = 0.5499518 Node = 69.18106 (2000.0) a = 3.6920367 AU Inc. = 20.14170 n'= 0.13893289 q = 1.6615946 AU P = 7.094 years T = 1985 Aug. 4.23819 TT Epoch = 1985 Aug. 3.0 TT Peri. = 10.83736 e = 0.5518072 Node = 69.13715 (2000.0) a = 3.6839190 AU Inc. = 20.14440 n'= 0.13939236 q = 1.6511058 AU P = 7.071 years T = 1992 Sept. 1.67203 TT Epoch = 1992 Sept.15.0 TT Peri. = 11.00632 e = 0.5519665 Node = 69.05451 (2000.0) a = 3.6815226 AU Inc. = 20.13607 n'= 0.13952848 q = 1.6494455 AU P = 7.064 years The predicted orbit for the 2008 return is as follows: T = 2008 July 20.35848 TT Epoch = 2008 Aug. 2.0 TT Peri. = 18.97673 e = 0.4619059 Node = 66.57182 (2000.0) a = 4.0322463 AU Inc. = 22.37540 n'= 0.12172604 q = 2.1697281 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/ 921030 411 1.6+ 1.1- 2001/ 790202 413 (1.4- 4.2-) 921130 360 0.2+ 0.9+ 010130 867 0.3- 0.4- 790202 413 1.3- 0.6- 921130 360 0.4+ 0.5+ 010130 867 0.7+ 0.4+ 790207 413 0.6- 1.2- 921202 691 0.1- 0.0 010130 867 0.3+ 0.6+ 1985/ 921202 691 0.1- 0.3+ 010222 867 0.1- 1.0+ 850727 675 0.9- 1.8+ 921202 691 0.2+ 0.4+ 010222 867 0.2- 1.1+ 850727 675 1.9- 1.2+ 1993/ 010222 867 0.1- 1.5+ 850728 675 0.1- 1.9+ 930121 360 1.0+ 0.2+ 010321 360 0.2- 1.2+ 850728 675 0.8- 1.6+ 930121 360 0.6+ 0.7- 010321 360 0.2- 1.3+ 850729 675 0.4- 1.4+ 930124 691 0.8- 0.7+ 010321 867 0.0 1.3+ 850729 675 1.1- 1.6+ 930124 691 0.6- 0.4+ 010321 867 0.1- 1.3+ 1986/ 930124 691 1.2- 0.4+ 010321 867 0.1- 1.3+ 860211 691 0.2+ 1.8- 930219 360 (6.6- 3.3-) 010324 349 0.3- 1.0- 860211 691 0.4- 1.6- 930219 360 (4.6- 3.5-) 010324 349 0.3- 1.9- 860211 691 (0.3- 2.3-) 930330 691 1.4- 0.0 010326 699 (0.8+ 2.9-) 860307 691 0.4- 1.0- 930330 691 0.8- 0.1+ 010326 699 (0.1+ 2.2-) 860307 691 0.1+ 0.2- 930330 691 1.1- 0.2+ 010326 699 (0.8+ 2.3-) 860307 691 0.2- 0.5+ 930422 691 0.7+ 0.4+ 010326 699 (0.2+ 2.7-) 1992/ 930422 691 0.1- 0.3- 010326 360 0.5+ 0.9+ 920729 372 1.3+ 0.6- 930422 691 0.0 0.1+ 010326 360 0.3+ 0.8+ 920808 372 (1.1- 2.1+) 930528 691 0.8+ 0.2+ 010326 349 0.2+ 0.5- 920809 372 0.0 0.3+ 930528 691 0.1+ 0.7+ 010326 349 0.5+ 0.7+ 920929 691 0.3+ 0.7+ 1999/ 010326 349 0.6+ 1.0+ 920929 691 1.0- 0.6+ 991113 695 1.3- 1.4+ 010401 867 0.5+ 0.5- 920929 691 0.6- 0.6+ 991113 695 0.3- 1.6+ 010401 867 0.4- 0.3- 921025 360 (0.2+ 2.3-) 991113 695 0.1+ 0.7+ 010401 867 0.5+ 0.9- 921025 360 0.4+ 1.5- 2000/ 010401 867 0.2+ 0.5- 921025 360 0.6+ 1.5- 001222 867 0.2- 0.2- 010416 402 0.5- 0.9- 921030 411 (2.8+ 2.1+) 001222 867 0.0 0.4- 010416 402 1.4+ 0.5- 921030 411 0.1+ 0.1+ 001222 867 0.2- 0.3- 010416 402 1.3+ 0.8- ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2005 July 4