OAA computing section circular NK 1052 P/1998 U2 (Mueller)
The following improved orbital elements, by S. Nakano, are from 146 observations 1998 Sept. 14 to 1999 Feb. 14. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.58 arc second. Epoch = 1998 Nov. 3.0 TT T = 1998 Oct. 20.74878 +/- 0.00666 (m.e.) TT Peri. = 49.53096 +/- 0.00357 Node = 336.22427 +/- 0.00125 (2000.0) Inc. = 2.19328 +/- 0.00003 q = 2.0252745 +/- 0.0000206 AU e = 0.5215417 +/- 0.0000143 a = 4.2329176 +/- 0.0000316 AU n' = 0.11317340 +/- 0.00000126 P = 8.709 +/- 0.0000975 years (+/- 0.04 day) The predicted orbit for the 2007 return is as follows: T = 2007 July 7.86638 TT Epoch = 2007 June 29.0 TT Peri. = 49.72609 e = 0.5206267 Node = 336.12036 (2000.0) a = 4.2386312 AU Inc. = 2.18992 n'= 0.11294464 q = 2.0318867 AU P = 8.726 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1998/ 981024 681 0.5- 0.4+ 981111 704 0.5- 1.7- 980914 699 0.5+ 0.1- 981024 681 0.6- 0.7+ 981111 704 (1.0- 2.8+) 980914 699 0.2+ 0.2- 981024 691 (0.4- 2.6-) 981111 704 1.8- 0.8- 980914 699 0.1- 0.0 981024 691 0.7- 1.7- 981111 118 0.7+ 0.3- 981021 675 0.1+ 0.2- 981024 402 1.0+ 1.1+ 981111 118 0.7+ 0.2- 981022 675 0.5- 0.2- 981024 402 0.7+ 1.3+ 981112 360 0.1- 0.5+ 981022 557 0.1- 0.2+ 981024 402 0.9+ 1.2+ 981112 360 0.2+ 0.3+ 981022 106 0.6- 0.1- 981024 372 1.2- 1.6+ 981112 867 0.3+ 0.1- 981022 106 0.2+ 0.2- 981024 372 (1.5- 2.1+) 981112 867 0.4+ 0.0 981022 118 0.2+ 0.1+ 981024 897 0.2- 0.2+ 981112 372 1.0+ 0.9+ 981022 557 0.1- 0.1+ 981024 886 (2.2+ 0.4+) 981112 867 0.7+ 0.5- 981022 118 0.3+ 0.0 981024 360 0.5- 0.1+ 981112 897 0.7+ 0.2- 981022 106 0.7+ 0.1- 981024 897 0.5+ 0.2+ 981112 897 0.7+ 0.8- 981022 557 0.1- 0.2+ 981024 867 0.7+ 0.7- 981114 372 0.4+ 1.0+ 981022 106 0.9+ 0.9- 981024 360 0.5- 0.0 981117 504 1.3+ 0.1+ 981022 118 0.1- 0.4- 981024 867 0.6+ 0.5- 981123 693 0.2- 1.1+ 981022 046 0.7- 0.7+ 981024 897 0.5+ 0.3- 981123 693 0.1+ 1.4+ 981022 046 0.3- 0.4+ 981024 886 (1.0- 2.0-) 981123 693 0.1+ 1.4+ 981022 046 0.4- 0.6+ 981024 360 0.6- 0.0 981123 372 0.1- 0.4+ 981022 587 0.1+ 0.4- 981024 355 0.5+ 0.7- 981123 360 0.1+ 0.2+ 981022 587 0.7- 1.5+ 981024 355 0.1- 0.3- 981123 360 0.1- 0.2+ 981022 046 0.4- 0.7+ 981024 355 0.2- 0.3+ 981124 561 0.0 0.2+ 981022 046 0.9+ 0.1- 981024 540 0.9+ 1.2- 981124 561 0.0 0.2+ 981023 755 0.1+ 0.2- 981024 540 0.9+ 0.0 981124 561 0.1- 0.0 981023 734 0.4- 0.1+ 981024 540 0.8+ 0.3- 981125 046 0.4- 0.1- 981023 734 0.1- 0.1+ 981024 540 0.2+ 0.7- 981125 046 0.7- 0.0 981023 734 0.7+ 0.3+ 981024 557 0.6+ 0.4- 981125 046 0.6- 0.5- 981023 755 (2.0+ 0.2+) 981024 557 0.5+ 0.4- 981125 046 0.0 0.1- 981023 725 0.2+ 0.1+ 981024 106 0.1+ 0.5- 981126 402 0.1- 0.1- 981023 725 0.2+ 0.0 981024 106 0.7- 0.3- 981126 402 0.5- 0.0 981023 691 (0.8+ 2.3-) 981024 106 0.3- 0.0 981126 402 0.2- 0.4- 981023 691 (0.4+ 2.2-) 981024 106 0.9- 0.1- 981204 097 0.2- 0.0 981023 691 (1.3+ 2.8-) 981025 402 0.4- 0.1+ 981204 097 0.1+ 0.6- 981023 658 0.7- 0.5+ 981025 402 0.2- 0.2+ 981209 113 0.7+ 1.3- 981023 658 0.9- 0.3+ 981025 402 0.4- 0.1+ 981209 118 0.4- 0.7- 981023 658 0.8- 0.6+ 981025 426 0.1+ 0.2+ 981209 118 0.1+ 0.9- 981023 046 1.3- 1.6+ 981025 426 0.2+ 0.1+ 981209 113 0.4+ 0.8- 981023 046 0.5- 0.2+ 981025 900 0.0 0.2+ 981210 113 0.6+ 0.1- 981023 046 0.4- 0.3+ 981025 426 0.0 0.1+ 981210 113 0.7+ 0.3- 981023 046 0.1- 0.1+ 981025 900 0.1- 0.2- 981217 402 1.0+ 0.3- 981023 046 0.9- 0.8+ 981026 118 0.4+ 0.2- 981217 402 0.5+ 0.5- 981023 120 0.1- 0.1- 981026 118 0.2+ 0.1+ 981217 402 0.2- 0.0 981023 120 0.8+ 0.4- 981029 360 0.4- 0.4+ 981217 360 0.3- 0.0 981023 118 0.2- 0.7- 981029 360 0.4- 0.5+ 981217 360 0.5- 0.2+ 981023 118 0.3- 0.3- 981029 372 0.2- 1.0+ 1999/ 981023 118 0.2- 0.1- 981107 046 0.7- 0.3- 990113 360 0.0 0.1- 981024 620 0.5+ 1.2- 981107 046 0.3- 0.1- 990113 360 0.0 0.3+ 981024 620 0.5+ 1.2- 981107 046 0.4- 0.1+ 990121 360 0.1- 0.1- 981024 620 0.6+ 1.0- 981107 046 0.1+ 0.0 990121 360 0.2+ 0.2+ 981024 620 0.6+ 0.8- 981108 360 0.6- 0.4+ 990121 360 1.4- 0.2- 981024 761 (2.0+ 1.7-) 981108 360 0.3- 0.4+ 990214 693 0.1- 0.5+ 981024 761 0.6+ 1.8- 981111 704 (2.2+ 0.3+) 990214 693 0.1+ 0.4+ 981024 681 0.7- 0.5+ 981111 704 0.2+ 0.3+ 990214 693 0.3+ 0.6+ ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2004 Apr. 7