OAA computing section circular NK 696 124P/Mrkos
The following improved orbital elements, by S. Nakano, are from 66 observations 1991-1998. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.78 arc second. Epoch = 1996 Nov. 13.0 TT T = 1996 Nov. 9.07132 +/- 0.00285 (m.e.) TT Peri. = 180.52138 +/- 0.00030 Node = 1.65282 +/- 0.00002 (2000.0) Inc. = 31.47084 +/- 0.00005 q = 1.4128947 +/- 0.0000017 AU e = 0.5542497 +/- 0.0000003 a = 3.1696996 +/- 0.0000014 AU n' = 0.17465335 +/- 0.00000011 P = 5.643 +/- 0.0000036 years T = 1991 Mar. 18.96891 TT Epoch = 1991 Mar. 5.0 TT Peri. = 180.40934 e = 0.5547675 Node = 1.68764 (2000.0) a = 3.1679039 AU Inc. = 31.48735 n'= 0.17480187 q = 1.4104539 AU P = 5.638 years The predicted orbit for the 2002 return is as follows: T = 2002 July 27.01727 TT Epoch = 2002 July 25.0 TT Peri. = 181.24387 e = 0.5426430 Node = 1.39022 (2000.0) a = 3.2076720 AU Inc. = 31.35226 n'= 0.17156123 q = 1.4670511 AU P = 5.745 years The following residuals in seconds of arc are from the above orbital elements: 1991/ 910321 801 0.3- 1.0+ 910518 413 0.1+ 0.2+ 910315 400 0.6- 0.9- 910321 801 0.4- 0.5+ 910611 474 0.3- 0.9+ 910315 400 (3.6+ 4.5+) 910321 657 1.3+ 0.1- 910611 474 1.1+ 0.9- 910315 400 (3.6+ 1.4-) 910321 657 (1.5- 8.6-) 910710 474 0.5+ 0.4- 910315 400 (2.9+ 1.8+) 910321 413 0.3+ 0.4- 910710 474 1.6+ 0.2- 910316 896 (0.2+ 2.8-) 910321 474 0.3- 1.1+ 1995/ 910316 046 (6.1- 4.2-) 910321 474 0.5+ 0.9+ 950920 691 1.1- 1.6+ 910316 046 (5.0- 3.2-) 910321 413 0.8+ 0.5- 950920 691 0.1- 0.7+ 910317 046 (2.6- 0.3-) 910321 046 0.6- 0.1+ 950920 691 (2.3- 1.3+) 910317 046 (3.6- 2.8-) 910321 046 1.2- 1.5- 950920 691 0.5- 2.1+ 910317 896 (0.6- 4.5-) 910322 046 1.3- 0.4- 950928 709 (0.0 3.0+) 910317 046 (2.6- 1.5-) 910322 046 0.8+ 1.3+ 950928 709 (1.4+ 3.4-) 910317 046 (2.8- 1.5-) 910322 413 0.5+ 0.8+ 951021 709 0.5+ 0.2- 910318 046 (0.7- 4.2+) 910323 372 0.4+ 0.4+ 951021 709 0.3- 0.3- 910318 046 (1.7- 5.0+) 910323 372 0.0 0.6- 951021 709 1.0+ 0.3+ 910318 675 (4.9+ 0.3+) 910323 372 1.5+ 0.8- 951021 709 1.2- 0.5- 910318 675 (2.5+ 0.5-) 910323 372 0.3- 0.6+ 951027 693 0.8+ 0.5+ 910318 413 (3.2- 1.3+) 910402 413 0.6+ 0.2- 951027 693 0.4+ 0.5+ 910318 323 1.2+ 1.8+ 910403 413 1.1+ 0.5- 951027 693 0.9+ 0.2- 910318 323 (7.0+ 12.6+) 910403 372 1.8- 0.5+ 951028 658 0.1- 0.2- 910319 474 0.9- 1.4- 910403 372 1.9- 0.3+ 951028 658 0.3+ 0.1+ 910319 474 0.8- 0.9- 910403 372 1.6- 0.5+ 951030 658 0.3- 0.7- 910319 474 0.4- 0.8- 910405 413 0.8+ 0.0 951030 658 1.0- 0.5- 910319 474 0.3- 1.0- 910408 372 1.6+ 0.9+ 951119 658 0.5- 0.6+ 910319 323 0.0 0.2- 910416 474 0.8+ 0.2+ 951119 658 (2.3- 0.5+) 910319 323 0.3+ 0.4+ 910416 474 1.2+ 0.0 951119 658 0.5- 0.1- 910319 413 (2.5- 1.6+) 910418 413 0.0 0.3- 1998/ 910320 413 0.7+ 0.2+ 910418 413 0.9- 1.2- 980916 693 0.2- 0.3- 910320 372 0.1- 0.4+ Y 910420 413 0.7+ 0.5- 980916 693 0.3+ 0.3- 910320 372 1.1- 0.4+ Y 910505 372 (2.8- 0.6-) 980916 693 0.7+ 0.5- 910320 413 0.2- 0.2+ 910516 413 0.1- 0.1- 980916 693 0.2- 0.1- ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 1999 Oct. 31