OAA computing section circular NK 1531 190P/Mueller (1998 U2 = 2007 O2)
The following improved orbital elements, by S. Nakano, are from 151 observations 1998 to 2007. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.59 arc second. See orbit in NK 1052 (= HICQ 2007). Epoch = 2007 June 29.0 TT T = 2007 July 8.20065 +/- 0.00286 (m.e.) TT Peri. = 49.73154 +/- 0.00179 Node = 336.11949 +/- 0.00114 (2000.0) Inc. = 2.18993 +/- 0.00003 q = 2.0319153 +/- 0.0000036 AU e = 0.5206515 +/- 0.0000008 a = 4.2389106 +/- 0.0000025 AU n' = 0.11293347 +/- 0.00000010 P = 8.727 +/- 0.0000077 years T = 1998 Oct. 20.75929 TT Epoch = 1998 Nov. 3.0 TT Peri. = 49.53608 e = 0.5215659 Node = 336.22356 (2000.0) a = 4.2332053 AU Inc. = 2.19329 n'= 0.11316186 q = 2.0253097 AU P = 8.710 years The predicted orbit for the 2016 return is as follows: T = 2016 Apr. 7.85999 TT Epoch = 2016 Apr. 2.0 TT Peri. = 50.41738 e = 0.5207871 Node = 335.55473 (2000.0) a = 4.2427753 AU Inc. = 2.17269 n'= 0.11277920 q = 2.0331929 AU P = 8.739 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 691 (0.5+ 2.6-) 981111 118 0.5+ 0.2- 980914 699 0.9+ 0.1- 981024 691 0.3+ 1.6- 981112 360 0.2- 0.5+ 980914 699 0.6+ 0.2- 981024 402 0.9+ 1.1+ 981112 360 0.1+ 0.3+ 980914 699 0.3+ 0.0 981024 402 0.7+ 1.3+ 981112 867 0.1+ 0.2- 981021 675 0.1+ 0.1- 981024 402 0.9+ 1.2+ 981112 867 0.3+ 0.0 981022 675 0.6- 0.2- 981024 372 1.3- 1.6+ 981112 372 0.9+ 0.9+ 981022 557 0.2- 0.2+ 981024 372 (1.5- 2.1+) 981112 867 0.6+ 0.5- 981022 106 0.7- 0.1- 981024 897 0.3- 0.2+ 981112 897 0.5+ 0.2- 981022 106 0.1+ 0.2- 981024 886 (2.1+ 0.4+) 981112 897 0.6+ 0.8- 981022 118 0.1+ 0.1+ 981024 360 0.5- 0.1+ 981114 372 0.3+ 1.0+ 981022 557 0.2- 0.1+ 981024 897 0.4+ 0.2+ 981117 504 1.2+ 0.1+ 981022 118 0.3+ 0.0 981024 867 0.7+ 0.7- 981123 693 0.3- 1.1+ 981022 106 0.7+ 0.0 981024 360 0.5- 0.0 981123 693 0.0 1.4+ 981022 557 0.1- 0.2+ 981024 867 0.6+ 0.5- 981123 693 0.0 1.4+ 981022 106 0.8+ 0.9- 981024 897 0.4+ 0.3- 981123 372 0.2- 0.4+ 981022 118 0.2- 0.3- 981024 886 (1.1- 2.0-) 981123 360 0.0 0.2+ 981022 046 0.8- 0.7+ 981024 360 0.7- 0.1+ 981123 360 0.2- 0.2+ 981022 046 0.4- 0.5+ 981024 355 0.4+ 0.7- 981124 561 0.1- 0.2+ 981022 046 0.5- 0.6+ 981024 355 0.1- 0.3- 981124 561 0.1- 0.2+ 981022 587 0.1+ 0.4- 981024 355 0.2- 0.3+ 981124 561 0.2- 0.0 981022 587 0.7- 1.5+ 981024 540 0.8+ 1.2- 981125 046 0.5- 0.2- 981022 046 0.5- 0.7+ 981024 540 0.8+ 0.0 981125 046 0.8- 0.0 981022 046 0.9+ 0.1- 981024 540 0.8+ 0.3- 981125 046 0.6- 0.5- 981023 755 0.1+ 0.2- 981024 540 0.1+ 0.7- 981125 046 0.1- 0.1- 981023 734 0.4- 0.1+ 981024 557 0.5+ 0.3- 981126 402 0.1- 0.1- 981023 734 0.2- 0.2+ 981024 557 0.5+ 0.4- 981126 402 0.5- 0.0 981023 734 0.7+ 0.3+ 981024 106 0.0 0.5- 981126 402 0.3- 0.4- 981023 755 1.9+ 0.2+ 981024 106 0.8- 0.3- 981204 097 0.2- 0.0 981023 725 0.2+ 0.1+ 981024 106 0.3- 0.0 981204 097 0.1+ 0.6- 981023 725 0.2+ 0.0 981024 106 1.0- 0.0 981209 113 0.8+ 1.3- 981023 691 (1.7+ 2.3-) 981025 402 0.5- 0.1+ 981209 118 0.4- 0.7- 981023 691 (1.4+ 2.2-) 981025 402 0.3- 0.2+ 981209 118 0.2+ 0.9- 981023 691 (2.2+ 2.8-) 981025 402 0.5- 0.1+ 981209 113 0.4+ 0.8- 981023 658 0.8- 0.5+ 981025 426 0.1+ 0.2+ 981210 113 0.7+ 0.0 981023 658 1.0- 0.3+ 981025 426 0.1+ 0.1+ 981210 113 0.7+ 0.3- 981023 658 0.8- 0.7+ 981025 900 0.1- 0.2+ 981217 402 1.1+ 0.3- 981023 046 1.3- 1.6+ 981025 426 0.1- 0.1+ 981217 402 0.6+ 0.5- 981023 046 0.6- 0.3+ 981025 900 0.2- 0.2- 981217 402 0.1- 0.0 981023 046 0.5- 0.3+ 981026 118 0.4+ 0.2- 981217 360 0.2- 0.0 981023 046 0.2- 0.1+ 981026 118 0.1+ 0.1+ 981217 360 0.4- 0.3+ 981023 046 1.0- 0.8+ 981029 360 0.5- 0.4+ 1999/ 981023 120 0.1- 0.1- 981029 360 0.5- 0.5+ 990113 360 0.2+ 0.1- 981023 120 0.8+ 0.4- 981029 372 0.3- 1.0+ 990113 360 0.2+ 0.4+ 981023 118 0.2- 0.7- 981107 046 0.8- 0.3- 990121 360 0.1+ 0.1- 981023 118 0.4- 0.3- 981107 046 0.4- 0.1- 990121 360 0.3+ 0.2+ 981023 118 0.2- 0.1- 981107 046 0.6- 0.1+ 990121 360 1.3- 0.2- 981024 620 0.5+ 1.2- 981107 046 0.0 0.0 990214 693 0.2- 0.4+ 981024 620 0.5+ 1.1- 981108 360 0.7- 0.4+ 990214 693 0.0 0.4+ 981024 620 0.5+ 1.0- 981108 360 0.5- 0.4+ 990214 693 0.2+ 0.6+ 981024 620 0.5+ 0.8- 981111 704 (2.0+ 0.3+) 2007/ 981024 761 1.9+ 1.7- 981111 704 0.1+ 0.2+ 070726 204 0.2+ 0.3- 981024 761 0.5+ 1.8- 981111 704 0.6- 1.7- 070726 204 0.1- 0.6- 981024 681 0.7- 0.6+ 981111 704 (1.2- 2.8+) 070727 J95 0.3+ 1.6- 981024 681 0.6- 0.4+ 981111 704 (2.0- 0.8-) 070727 J95 0.1+ 0.7+ 981024 681 0.7- 0.7+ 981111 118 0.6+ 0.3- ( ) -------- Rejected Obs.
Director, Computing Section Late edition Syuichi Nakano 2007 Aug. 1