OAA computing section circular NK 747 C/1999 S2 (McNaught-Watson)
The following improved orbital elements, by S. Nakano, are from 71 observations 1999 Sept. 19 to 2000 Oct. 27. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.63 arc second. Epoch = 1997 Nov. 8.0 TT T = 1997 Nov. 22.50733 +/- 0.01216 (m.e.) TT Peri. = 223.47082 +/- 0.00286 Node = 74.42755 +/- 0.00044 (2000.0) Inc. = 65.81300 +/- 0.00008 q = 6.4662003 +/- 0.0002310 AU e = 1.0072963 +/- 0.0000717 1/a = -0.0011284 +/- 0.0000111 1/AU origin = +0.000040 (Q= 7) future = -0.000338 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1999/ 990928 413 0.0 0.1- 991019 428 0.5- 0.1- 990919 413 1.5- 1.5- 990928 413 0.2- 0.4- 991019 428 0.1+ 0.4- 990919 413 0.5- 1.2+ 990928 413 0.7- 0.4- 991107 428 0.5- 0.3+ 990921 413 0.1- 0.1- 990930 834 0.0 1.3+ 991110 322 (0.3- 3.5-) 990921 413 0.1- 0.0 990930 428 0.0 1.0+ 991110 322 (2.7+ 3.1-) 990921 413 0.2- 0.0 990930 428 0.4+ 0.1+ 991110 474 0.0 0.9- 990921 413 0.3- 0.0 991002 834 0.1+ 0.3- 991110 474 0.6- 1.2- 990921 428 0.4- 0.5+ 991002 834 (2.4+ 0.7-) 991110 474 0.4- 0.7- 990921 428 0.0 0.6- 991004 834 1.6- 1.1- 991115 474 0.3+ 0.6- 990922 467 1.1+ 0.5- 991004 834 1.0+ 0.1+ 991115 474 0.0 1.1- 990922 467 0.9- 0.1- 991004 428 0.4+ 1.1+ 991122 322 (0.3+ 4.3-) 990922 467 1.0+ 0.6- 991004 428 1.1+ 0.5+ 991122 322 (1.2- 2.2-) 990922 467 0.3+ 0.5+ 991005 413 0.1- 0.1+ 991205 428 (3.4+ 0.4-) 990923 467 (1.0- 2.0+) 991005 413 0.1- 0.4+ 2000/ 990923 467 0.5+ 0.8+ 991005 413 0.0 0.2+ 000205 428 0.2- 0.4+ 990923 467 1.7+ 0.9+ 991011 428 0.3- 1.0+ 000205 428 0.3- 1.7+ 990923 428 0.2- 0.1+ 991011 428 0.5+ 0.6- 000228 413 0.4+ 0.2- 990923 428 0.6- 0.1- 991015 467 0.8+ 1.2- 000228 413 0.2+ 0.6- 990923 428 0.3- 0.3- 991015 467 0.3- 1.0- 000228 413 0.7+ 0.6- 990924 428 0.4+ 0.4+ 991015 467 0.8- 0.1+ 000305 474 0.8- 0.4+ 990924 428 0.8+ 0.5+ 991015 413 0.2+ 0.1- 000305 474 0.3+ 0.4+ 990924 428 0.2+ 0.0 991015 413 0.4+ 0.3+ 000305 474 0.1+ 0.4- 990927 834 0.1- 1.5- 991016 413 0.1+ 0.1+ 000727 474 0.3- 1.0- 990927 834 1.0- 0.0 991016 413 0.1+ 0.2+ 000727 474 0.5- 0.2- 990927 834 0.2- 0.1+ 991016 413 0.1+ 0.3+ 001027 428 0.6+ 0.3+ 990927 834 0.4+ 1.8+ 991017 413 0.1+ 0.4+ 001027 428 0.1- 0.7+ 990928 413 0.1- 0.2- 991017 413 0.0 0.2+ ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2000 Dec. 20