OAA computing section circular NK 1196 124P/Mrkos
The following improved orbital elements, by S. Nakano, are from 104 observations 1991 to 2002. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.82 arc second. See a previous orbit in NK 696. Epoch = 2002 July 25.0 TT T = 2002 July 27.01383 +/- 0.00036 (m.e.) TT Peri. = 181.24378 +/- 0.00005 Node = 1.39016 +/- 0.00002 (2000.0) Inc. = 31.35215 +/- 0.00003 q = 1.4670499 +/- 0.0000009 AU e = 0.5426432 +/- 0.0000003 a = 3.2076704 +/- 0.0000008 AU n' = 0.17156135 +/- 0.00000006 P = 5.745 +/- 0.0000022 years T = 1991 Mar. 18.96875 TT Epoch = 1991 Mar. 5.0 TT Peri. = 180.40925 e = 0.5547677 Node = 1.68757 (2000.0) a = 3.1679022 AU Inc. = 31.48724 n'= 0.17480201 q = 1.4104524 AU P = 5.638 years T = 1996 Nov. 9.06945 TT Epoch = 1996 Nov. 13.0 TT Peri. = 180.52129 e = 0.5542499 Node = 1.65275 (2000.0) a = 3.1696979 AU Inc. = 31.47072 n'= 0.17465349 q = 1.4128932 AU P = 5.643 years The predicted orbit for the 2008 return is as follows: T = 2008 Apr. 27.21047 TT Epoch = 2008 May 14.0 TT Peri. = 181.36953 e = 0.5423447 Node = 1.35225 (2000.0) a = 3.2089066 AU Inc. = 31.34070 n'= 0.17146223 q = 1.4685730 AU P = 5.748 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1991/ 910323 372 0.7+ 0.5+ 1998/ 910315 400 0.3- 0.9- 910323 372 0.4+ 0.5- 980916 693 0.0 0.6- 910315 400 (4.0+ 4.5+) 910323 372 1.8+ 0.7- 980916 693 0.4+ 0.6- 910315 400 (4.0+ 1.3-) 910323 372 0.0 0.7+ 980916 693 0.8+ 0.9- 910315 400 (3.3+ 1.8+) 910402 413 0.9+ 0.1- 980916 693 0.1- 0.5- 910316 896 (0.6+ 2.7-) 910403 413 1.4+ 0.4- 1999/ 910316 046 (5.7- 4.2-) 910403 372 1.5- 0.6+ 990913 695 0.1- 0.9+ 910316 046 (4.6- 3.1-) 910403 372 1.7- 0.4+ 990913 695 0.0 1.0+ 910317 046 2.2- 0.3- 910403 372 1.3- 0.6+ 990913 695 0.1- 0.8+ 910317 046 (3.2- 2.8-) 910405 413 0.9+ 0.1+ 991113 695 1.5- 1.8+ 910317 896 (0.2- 4.5-) 910408 372 1.8+ 0.9+ 991113 695 (1.4- 2.1+) 910317 046 2.2- 1.5- 910416 474 0.9+ 0.3+ 991113 695 1.3- 1.2+ 910317 046 2.4- 1.5- 910416 474 1.3+ 0.1+ 2001/ 910318 046 (0.3- 4.2+) 910418 413 0.0 0.3- 010919 867 0.4+ 0.3+ 910318 046 (1.3- 5.1+) 910418 413 0.9- 1.2- 010919 867 0.9+ 0.1- 910318 675 (5.3+ 0.3+) 910420 413 0.7+ 0.4- 010919 867 0.4+ 0.3+ 910318 675 (2.9+ 0.5-) 910505 372 (2.9- 0.6-) 010922 867 0.2- 0.0 910318 413 (2.9- 1.4+) 910516 413 0.4- 0.1- 010922 867 0.2+ 0.6- 910318 323 1.6+ 1.9+ 910518 413 0.1- 0.2+ 010922 867 0.1+ 0.2+ 910318 323 (7.4+ 12.6+) 910611 474 0.6- 0.8+ 011013 867 0.8+ 0.7+ 910319 474 0.5- 1.4- 910611 474 0.7+ 0.9- 011013 867 0.0 0.2+ 910319 474 0.5- 0.9- 910710 474 0.1+ 0.6- 011013 867 0.7+ 0.7+ 910319 474 0.0 0.7- 910710 474 1.2+ 0.4- 011122 867 0.4+ 0.0 910319 474 0.0 0.9- 1995/ 011122 867 0.3+ 0.2- 910319 323 0.6+ 0.5+ 950920 691 1.3- 1.7+ 011122 867 0.5+ 0.1- 910319 323 0.3+ 0.1- 950920 691 0.4- 0.8+ 011218 360 0.2+ 0.5+ 910319 413 2.2- 1.6+ 950920 691 (2.6- 1.5+) 011218 360 0.2+ 0.2+ 910320 413 1.0+ 0.2+ 950920 691 (0.8- 2.2+) 2002/ 910320 372 0.3+ 0.5+ Y 950928 709 (0.4- 3.1+) 020105 360 0.4+ 0.1+ 910320 372 0.8- 0.4+ Y 950928 709 (1.1+ 3.3-) 020105 360 0.4+ 0.2+ 910320 413 0.1+ 0.2+ 951021 709 0.2+ 0.1- 020105 360 0.1- 0.2- 910321 801 0.0 1.0+ 951021 709 0.6- 0.2- 020126 704 0.6- 1.0- 910321 801 0.1- 0.5+ 951021 709 0.7+ 0.4+ 020126 704 1.0- 1.3- 910321 657 1.7+ 0.0 951021 709 1.6- 0.4- 020126 704 0.8- 0.9- 910321 657 (1.1- 8.5-) 951027 693 0.5+ 0.6+ 020126 704 1.4- 0.5- 910321 413 0.7+ 0.3- 951027 693 0.0 0.5+ 020126 704 0.8- 1.4- 910321 474 0.0 1.1+ 951027 693 0.6+ 0.1- 020201 704 0.4+ 1.5- 910321 474 0.8+ 1.0+ 951028 658 0.4- 0.2- 020201 704 0.6+ 0.2- 910321 413 1.1+ 0.4- 951028 658 0.0 0.1+ 020201 704 0.4+ 0.0 910321 046 0.3- 0.2+ 951030 658 0.7- 0.7- 020201 360 0.8+ 0.6+ 910321 046 0.9- 1.5- 951030 658 1.4- 0.4- 020201 360 0.4+ 0.3+ 910322 046 0.9- 0.3- 951119 658 0.8- 0.6+ 020402 704 0.2+ 0.2+ 910322 046 1.1+ 1.4+ 951119 658 (2.6- 0.5+) 020402 704 0.5+ 0.1+ 910322 413 0.8+ 0.9+ 951119 658 0.8- 0.1- 020402 704 0.3+ 0.5+ ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2005 July 4