OAA computing section circular NK 790 120P/Mueller 1
The following improved orbital elements, by S. Nakano, are from 60 observations 1987-1996. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.81 arc second. See a prediction on NK 590. Epoch = 1996 Apr. 27.0 TT T = 1996 Apr. 24.64718 +/- 0.00489 (m.e.) TT Peri. = 29.91586 +/- 0.00099 Node = 4.56227 +/- 0.00018 (2000.0) Inc. = 8.79599 +/- 0.00004 q = 2.7394953 +/- 0.0000012 AU e = 0.3373744 +/- 0.0000003 a = 4.1343036 +/- 0.0000006 AU n' = 0.11724667 +/- 0.00000003 P = 8.406 +/- 0.0000019 years T = 1987 Dec. 4.09504 TT Epoch = 1987 Nov. 21.0 TT Peri. = 30.28454 e = 0.3376441 Node = 4.64468 (2000.0) a = 4.1467242 AU Inc. = 8.80034 n'= 0.11672029 q = 2.7466070 AU P = 8.444 years The predicted orbit for the 2004 return is as follows: T = 2004 Sept.30.12937 TT Epoch = 2004 Oct. 2.0 TT Peri. = 30.17184 e = 0.3367628 Node = 4.46036 (2000.0) a = 4.1415308 AU Inc. = 8.78700 n'= 0.11693991 q = 2.7468173 AU P = 8.428 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1987/ 871221 691 0.4- 0.8- 950902 691 0.0 0.4- 871018 675 0.1+ 0.4+ 871223 691 0.8+ 0.6+ 950902 691 0.6- 0.2- 871019 675 1.3- 0.3- 871223 691 1.1+ 0.2+ 951022 691 0.3+ 0.0 871020 675 1.3- 1.2+ 1988/ 951022 691 1.7+ 0.5+ 871021 675 (2.6- 0.4+) 880115 691 0.3+ 0.8- 951028 693 0.8+ 0.5+ 871021 372 (0.2- 3.3-)Y 880115 691 0.2- 0.5- 951028 693 0.4+ 0.8+ 871021 372 1.4+ 2.3- Y 880212 691 0.8+ 1.0- 951028 693 0.5- 0.6+ 871022 801 (2.9+ 7.3+) 880212 691 1.7+ 0.5+ 951116 691 1.8- 0.7- 871023 801 (3.1- 1.6+) 880212 691 0.7+ 0.3- 951116 691 0.5+ 0.3- 871024 801 0.3+ 2.0+ 880213 691 0.7+ 0.7+ 951116 691 0.3+ 0.1- 871026 691 0.3- 0.4- 880213 691 0.2- 0.1- 1996/ 871026 691 0.5+ 0.2- 880213 691 1.1- 0.8+ 960121 691 0.8+ 0.5+ 871026 691 0.2+ 0.3- 1995/ 960121 691 0.5+ 0.5+ 871027 691 0.2+ 0.2- 950730 691 0.2- 1.2+ 961113 867 0.6- 0.8+ 871027 691 0.2+ 0.2- 950730 691 0.6- 1.7+ 961113 867 1.5- 0.7+ 871027 372 0.4+ 0.8- Y 950730 691 0.4+ 1.2+ 961118 691 0.5+ 0.1+ 871028 675 0.2- 1.9- Y 950801 691 1.1- 1.0+ 961118 691 0.5- 0.5+ 871028 675 (1.0+ 4.0-)Y 950801 691 1.0- 0.2+ 961118 691 0.0 0.4+ 871116 691 0.1- 0.6- 950801 691 1.2- 1.8+ 961203 867 0.7+ 0.4+ 871116 691 0.7- 0.2- 950828 950(48.4+ 7.9+) 961203 867 0.5- 0.5+ 871124 691 0.4+ 0.0 950828 950(47.4+ 5.7+) 961214 691 0.4+ 1.0+ 871124 691 0.2+ 0.5- 950830 693 0.2+ 1.7- 961214 691 0.3+ 0.9+ 871221 691 1.2+ 0.4+ 950830 693 0.8- 1.5- 961214 691 0.9+ 1.1+ 871221 691 0.6- 1.0- 950902 691 0.1- 0.1+ ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2001 Apr. 28