OAA computing section circular NK 771 149P/Mueller 4
The following improved orbital elements, by S. Nakano, are from 47 observations 1992-2001. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.83 arc second. Epoch = 2001 Feb. 20.0 TT T = 2001 Feb. 7.84084 +/- 0.01436 (m.e.) TT Peri. = 43.60464 +/- 0.00403 Node = 145.36891 +/- 0.00030 (2000.0) Inc. = 29.74890 +/- 0.00015 q = 2.6467152 +/- 0.0000128 AU e = 0.3885939 +/- 0.0000029 a = 4.3288992 +/- 0.0000068 AU n' = 0.10943037 +/- 0.00000026 P = 9.007 +/- 0.0000211 years T = 1992 Feb. 16.11120 TT Epoch = 1992 Feb. 28.0 TT Peri. = 43.52197 e = 0.3893972 Node = 145.42899 (2000.0) a = 4.3182289 AU Inc. = 29.80285 n'= 0.10983622 q = 2.6367228 AU P = 8.973 years The predicted orbit for the 2010 return is as follows: T = 2010 Feb. 19.20049 TT Epoch = 2010 Feb. 13.0 TT Peri. = 43.76492 e = 0.3884916 Node = 145.26615 (2000.0) a = 4.3350983 AU Inc. = 29.73498 n'= 0.10919573 q = 2.6509489 AU P = 9.026 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1992/ 920503 589 0.9+ 0.4- 2000/ 920409 675 (1.5+ 4.4+) 920503 589 1.3- 0.5- 001222 867 0.2- 0.7- 920411 675 (0.5+ 4.2+) 920503 589 0.4+ 0.2- 001222 867 0.4- 0.6- 920412 413 0.6- 0.3- 920503 589 1.2+ 0.1- 001222 867 0.4+ 0.1- 920414 372 0.2- 0.0 920503 589 0.7+ 0.2+ 001222 867 1.3+ 1.3- 920414 372 0.1+ 1.7- 920506 801 0.5+ 1.2+ 2001/ 920420 372 1.2- 0.2- 920506 801 0.8+ 0.0 010127 372 1.0- 0.6+ 920420 372 (0.4+ 2.6-) 920510 372 1.2- 0.5+ 010127 372 0.9+ 1.0- 920422 372 1.2- 1.2+ 920524 372 (3.1+ 3.8+) 010130 867 0.2+ 0.2+ 920425 589 1.0- 1.0- 920525 372 (2.6- 1.5-) 010130 867 0.1- 0.0 920425 589 0.6+ 1.9- 920526 372 1.1- 0.2+ 010130 867 0.4- 0.3+ 920425 589 0.1- 0.9- 920601 372 1.5- 0.9- 010218 867 0.4- 0.6+ 920425 589 0.2+ 1.5- 920603 801 (0.3+ 2.8+) 010218 867 0.1+ 0.0 920425 589 0.4+ 0.1- 920603 801 (0.7+ 2.5+) 010218 867 0.4+ 0.3+ 920427 261 0.8- 1.3+ 920603 372 1.1- 1.1+ 010222 867 0.2+ 0.8+ 920427 261 1.2+ 0.9+ 920629 801 1.5+ 0.0 010222 867 0.1+ 1.0+ 920429 801 0.0 0.1- 920629 801 1.6+ 0.2+ 010222 867 0.7+ 0.8+ 920429 801 0.4+ 0.2+ 920702 801 1.2+ 0.1- 010226 360 0.1+ 0.7+ 920503 372 1.7- 0.2- 920702 801 2.0+ 0.2- 010226 360 0.9- 1.0+ ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2001 Mar. 3