OAA computing section circular NK 1104 69P/Taylor

The following improved orbital elements, by S. Nakano, are from 342 observations 1997 to 2004, including planetary perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas, Vesta, and non-gravitational effects of sublimating molecule = CO (or N2) using Yabushita's theory, MN 283, 347, were taken into account. The mean residual is +/- 0.75 arc seconds. See a previous orbit in NK 794 (= HICQ 2004). Epoch = 2004 Nov. 11.0 TT T = 2004 Nov. 30.61067 +/- 0.00318 (m.e.) TT Peri. = 355.52883 +/- 0.00148 Node = 108.79766 +/- 0.00012 (2000.0) Inc. = 20.56408 +/- 0.00006 q = 1.9417391 +/- 0.0000086 AU e = 0.4669015 +/- 0.0000105 a = 3.6423648 +/- 0.0000201 AU n' = 0.14178455 +/- 0.00000117 P = 6.951 +/- 0.0000576 years Y1 = +0.898 +/- 0.306 Y2 = -0.37451 +/- 0.03666 T = 1997 Dec. 12.27888 TT Epoch = 1997 Dec. 18.0 TT Peri. = 355.37922 e = 0.4660103 Node = 108.85920 (2000.0) a = 3.6477701 AU Inc. = 20.54770 n'= 0.14146952 q = 1.9478715 AU P = 6.967 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1997/ 980125 127 0.2- 0.3- 980315 897 0.6+ 1.5- 971008 402 0.9- 0.2- 980125 127 1.1- 0.6- 980316 372 0.4- 0.1- 971008 402 1.0- 0.3- 980125 127 0.8- 0.3- 980316 610 0.1+ 1.0- 971008 402 (3.0- 2.0+) 980126 118 0.7- 0.7+ 980316 610 0.1- 1.0- 971012 402 0.4- 0.8- 980126 118 0.7- 0.2+ 980316 610 0.4- 1.0- 971012 402 0.1- 0.2+ 980126 700 0.7- 0.2+ 980317 372 0.1+ 0.9+ 971012 402 0.5- 0.7- 980126 700 0.8- 0.4+ 980317 897 0.5- 1.2- 971012 402 0.7- 0.8- 980126 372 0.7- 0.8+ 980317 897 0.0 1.4- 971012 402 0.6- 0.1- 980127 372 0.6- 0.9+ 980317 897 0.1- 0.9- 971012 867 0.7- 0.7- 980128 566 1.0- 1.0- 980318 372 0.2- 0.3+ 971013 867 0.3- 0.9+ 980128 566 (1.1- 2.2-) 980318 610 1.0+ 0.8- 971013 867 0.9- 0.5+ 980128 566 (1.2- 2.0-) 980318 610 1.2+ 1.3- 971101 402 0.1- 0.4- 980128 403 0.5- 0.4- 980318 610 1.3+ 1.4- 971101 402 0.5+ 0.7- 980128 403 0.5- 0.8- 980318 610 1.3+ 1.5- 971101 402 0.2+ 0.4+ 980128 403 0.4- 0.4- 980318 143 (3.7+ 2.8-) 971103 360 0.8+ 0.3+ 980129 700 0.3- 0.1- 980318 143 (2.9+ 2.6-) 971103 360 0.9+ 0.2+ 980129 700 0.6- 0.0 980318 143 (2.4+ 3.0-) 971107 867 0.5+ 0.6- 980129 700 0.0 0.4+ 980320 118 0.4+ 1.1- 971107 867 0.1+ 0.5- 980129 403 0.7- 0.6- 980320 118 0.8+ 1.1- 971109 360 0.4+ 0.1- 980129 403 0.0 0.8- 980322 897 0.3- 1.9- 971109 360 0.1+ 0.1+ 980129 360 0.1- 0.8+ 980322 897 0.2+ 1.5- 971124 897 (2.6- 0.6-) 980129 360 0.1- 0.8+ 980322 360 0.5- 0.7- 971124 897 1.2- 0.6- 980129 372 0.7- 1.7+ 980322 360 0.5- 0.8- 971124 897 0.2- 0.4- 980129 143 0.2+ 0.1- 980322 610 0.8- 0.9- 971203 897 0.5+ 0.1- 980129 143 0.2+ 0.1- 980322 610 1.2- 1.9- 971203 897 0.3- 0.2+ 980129 143 0.4+ 0.2- 980323 118 0.5- 1.3- 971204 402 0.5+ 0.1+ 980130 403 0.0 0.3- 980323 118 0.4- 0.9- 971204 402 0.5+ 0.1+ 980130 403 0.1+ 0.6+ 980325 610 0.3+ 0.6- 971204 402 0.3+ 0.1- 980130 403 0.9- 0.1- 980325 610 0.4+ 1.0- 971204 360 0.8+ 0.1+ 980202 360 0.2- 0.2- 980325 610 0.6+ 1.4- 971204 360 0.7+ 0.2+ 980202 360 0.1- 0.2- 980325 610 0.8+ 1.9- 971204 360 0.8+ 0.2+ 980203 046 0.4- 0.1+ 980325 610 (0.9+ 2.2-) 971204 867 0.1- 0.6+ 980203 046 0.4- 0.1+ 980325 143 (2.8+ 1.3-) 971204 867 0.1- 0.4+ 980203 046 0.4- 0.1+ 980325 143 (2.2+ 1.7-) 971206 954 1.0+ 0.4+ 980204 118 0.3- 0.6- 980325 143 1.5+ 1.1- 971206 954 0.9+ 0.5+ 980204 118 0.2- 0.1- 980331 897 0.1+ 0.7- 971206 954 0.9+ 0.5+ 980204 118 0.1+ 0.2- 980331 897 0.2+ 1.9- 971206 954 1.0+ 0.5+ 980204 897 0.3- 0.1+ 980331 897 0.1- 1.7- 971206 954 1.0+ 0.5+ 980204 897 0.2- 0.2+ 980404 897 (1.1+ 2.9-) 971210 372 0.2+ 0.8+ 980204 897 0.3- 0.3+ 980404 897 (1.1+ 2.5-) 971211 372 0.5+ 1.1+ 980204 372 0.3+ 0.8+ 980408 965 0.3+ 0.2+ 971221 372 0.2- 1.8+ 980204 046 0.3- 0.7+ 980408 965 0.3- 0.7- 971221 897 0.6+ 0.4+ 980204 046 0.3- 0.7+ 980408 965 0.3- 1.2- 971221 897 0.7+ 0.6+ 980204 046 0.3- 0.7+ 980414 118 0.3+ 0.4- 971224 900 0.1- 0.9+ 980205 118 0.2+ 0.2- 980415 118 0.5+ 0.3- 971224 900 0.2- 1.2+ 980205 118 0.2+ 0.0 980418 699 (4.9+ 3.2-) 971224 360 0.6+ 0.6+ 980205 118 0.2+ 0.1- 980418 699 (4.4+ 5.0-) 971224 360 0.7+ 0.6+ 980205 403 0.1+ 0.5- 980418 699 (3.4+ 3.6-) 971225 402 0.7+ 0.6+ 980205 403 0.1+ 1.1- 980419 699 (4.5+ 4.4-) 971225 402 0.5+ 0.7+ 980205 403 0.3- 0.4- 980419 699 (4.5+ 5.1-) 971225 402 0.5+ 0.6+ 980206 118 0.5- 0.3- 980419 699 (1.9+ 3.0-) 971227 403 0.2+ 1.3+ 980206 118 0.3- 0.2- 980419 402 0.2+ 0.7- 971227 403 0.6+ 0.8+ 980207 118 0.5- 0.2- 980419 402 0.1- 1.2- 971227 372 0.1+ 1.8+ 980207 118 0.5- 0.3- 980419 402 0.1- 1.1- 971228 372 0.0 1.0+ 980207 118 0.6- 0.0 980419 897 0.2- 1.4- 971228 372 0.8- 1.0+ 980207 118 0.6- 0.2+ 980419 897 0.3+ 1.8- 971231 355 0.7- 0.7+ 980207 118 0.7- 0.2+ 980419 360 0.5- 0.8- 971231 355 1.0- 0.8+ 980208 900 0.6- 0.4+ 980419 360 0.6- 0.8- 971231 355 0.9- 0.8+ 980208 900 0.5- 0.3+ 980419 897 0.6+ 1.2- 971231 403 0.6- 1.2+ 980210 403 0.5- 0.2+ 980419 143 0.0 1.2- 971231 403 1.8- 0.6+ 980210 403 0.0 0.0 980419 143 0.3+ 1.1- 1998/ 980215 403 0.3+ 1.0- 980419 143 1.0+ 0.9- 980101 372 (0.3+ 2.2+) 980215 403 0.6+ 0.5- 980421 610 1.2+ 1.5- 980102 867 0.3- 1.0+ 980215 610 0.2- 0.0 980421 610 0.7+ 1.5- 980102 867 0.3- 0.8+ 980215 610 0.2- 0.1- 980421 610 0.4+ 1.5- 980104 897 1.0- 0.9+ 980215 610 0.2- 0.3- 980421 610 0.4- 1.5- 980104 897 0.9- 1.3+ 980217 403 0.9+ 0.9- 980421 143 0.3+ 1.3- 980105 352 1.9- 1.1+ 980217 403 0.8+ 1.2- 980421 143 0.0 0.7- 980105 352 1.1- 1.0+ 980217 372 0.6- 0.0 980421 143 0.0 0.8- 980105 352 1.3- 1.2+ 980217 897 0.2+ 0.7- 980421 143 0.9+ 1.2- 980105 900 0.6- 1.4+ 980217 897 0.1- 0.6- 980427 867 0.3+ 1.3- 980105 900 0.7- 1.0+ 980218 118 0.0 0.5- 980427 867 0.6+ 0.9- 980105 403 0.8- 0.8+ 980218 118 0.4+ 0.4- 980427 372 0.2- 0.3- 980105 403 0.0 0.8+ 980218 867 0.1+ 0.4- 980427 118 0.1- 0.7- 980105 372 0.6- 1.1+ 980218 867 0.2- 0.3- 980427 118 0.0 0.9- 980106 372 0.1- 1.2+ 980218 610 0.1- 0.5- 980510 605 (0.1+ 2.0-) 980108 118 0.7- 0.9+ 980218 610 0.0 0.6- 980510 605 (2.1+ 3.1-) 980109 118 0.8- 1.1+ 980218 610 0.0 0.6- 980510 605 0.1+ 1.0- 980109 118 0.8- 1.2+ 980220 118 0.3- 0.7- 980511 118 0.3+ 1.1- 980111 118 0.6- 0.4+ 980220 118 0.1- 0.8- 980511 118 0.4+ 1.1- 980111 118 0.6- 0.4+ 980220 118 0.2- 0.8- 980519 360 0.6+ 0.8+ 980116 403 0.8- 0.5+ 980221 118 0.4- 0.7- 980519 360 0.6+ 0.3+ 980116 403 0.5- 0.6+ 980221 360 0.3- 0.2- 980520 897 (1.1+ 2.1-) 980118 758 1.3- 0.3+ 980221 360 0.4- 0.4- 980520 897 1.8+ 1.2- 980118 758 1.6- 0.1+ 980221 970 0.0 0.6- 980520 897 (2.7+ 0.1-) 980118 403 0.6- 0.5+ 980221 970 0.3+ 1.8- 980520 372 1.9+ 1.9- 980118 403 1.0- 0.1- 980221 970 0.1- 1.3- 980529 118 0.8+ 0.5- 980118 897 0.8- 0.4+ 980221 970 0.1+ 0.6- 980529 118 0.6+ 0.5- 980118 897 0.8- 0.5+ 980221 970 0.2+ 0.9- 980531 897 0.1+ 1.1- 980118 897 0.8- 0.7+ 980222 900 0.3+ 0.7- 980531 897 0.8- 1.4- 980119 954 0.6- 0.8+ 980222 900 0.3+ 1.0- 980531 897 0.8+ 0.4- 980119 954 0.6- 0.9+ 980222 118 0.1+ 0.3+ 980602 118 0.7+ 0.9- 980119 954 0.6- 0.9+ 980222 118 0.3- 0.0 980602 118 0.1+ 0.8- 980119 954 0.6- 0.9+ 980225 120 1.5+ 0.3- 980617 360 0.5- 1.1- 980119 954 0.6- 0.9+ 980225 120 0.9+ 1.2- 980617 360 0.3- 1.0- 980119 954 0.6- 0.9+ 980226 107 (1.7+ 2.7-) 980619 696 0.6- 1.1- 980119 954 0.6- 0.8+ 980226 107 (2.4+ 0.6-) 980619 696 0.6- 1.0- 980119 954 0.6- 0.9+ 980228 610 0.1- 0.3- 980619 696 0.7- 1.1- 980119 954 0.6- 0.8+ 980228 610 0.1+ 0.6- 1999/ 980119 954 0.7- 0.8+ 980228 610 0.2+ 0.8- 990213 693 0.7+ 0.8- 980119 954 0.7- 0.9+ 980228 610 0.3+ 1.0- 990213 693 0.8+ 0.7- 980119 954 0.7- 0.8+ 980228 610 0.4+ 1.2- 990213 693 0.8+ 0.8- 980119 954 0.6- 0.9+ 980302 403 0.0 1.5- 990415 693 0.4- 0.9+ 980119 954 0.6- 0.8+ 980302 403 0.8+ 1.7- 990415 693 0.6- 1.2+ 980119 954 0.6- 0.9+ 980302 360 0.2- 0.5- 990415 693 0.1+ 1.4+ 980119 954 0.7- 0.8+ 980302 360 0.2- 0.6- 2004/ 980119 954 0.7- 0.8+ 980302 352 0.6+ 1.6- 041021 349 0.4- 1.4+ 980119 954 0.7- 0.8+ 980302 352 1.1+ 1.7- 041021 349 0.1- 1.4+ 980119 954 0.6- 0.8+ 980302 352 0.1+ 1.4- 041021 349 0.1- 1.4+ 980119 954 0.7- 0.8+ 980302 897 0.4+ 1.1- 041023 170 0.4- 0.3- 980119 954 0.7- 0.9+ 980302 897 0.5+ 1.4- 041023 170 0.3+ 0.7- 980119 954 0.7- 0.9+ 980303 402 0.1+ 0.5- 041023 170 0.2+ 0.4- 980119 954 0.7- 0.8+ 980303 402 0.0 0.6- 041023 360 0.3+ 0.6- 980119 954 0.7- 0.8+ 980303 402 0.1+ 0.4- 041023 360 0.1- 0.6- 980119 954 0.7- 0.9+ 980305 372 0.8+ 0.4+ 041024 442 0.4+ 1.4+ 980119 954 0.7- 0.9+ 980310 610 0.5+ 1.7- 041024 442 1.1- 0.2- 980119 954 0.7- 0.8+ 980310 610 0.6+ 1.9- 041024 442 0.5- 0.5- 980119 954 0.7- 0.8+ 980310 610 (0.5+ 2.0-) 041024 442 0.2+ 0.6- 980119 954 0.7- 0.9+ 980312 900 0.6+ 1.2- 041024 442 1.1+ 1.2- 980119 954 0.7- 0.8+ 980312 900 0.2- 0.9- 041024 170 0.1- 0.3+ 980121 355 0.9- 0.7+ 980314 610 (1.5- 3.0-) 041024 170 0.1- 0.3+ 980121 355 1.1- 0.7+ 980315 355 (1.9+ 2.7-) 041024 170 0.0 0.2+ 980124 118 1.2- 0.6+ 980315 355 (2.0+ 2.5-) 041024 170 0.2+ 0.4- 980124 118 0.9- 0.5+ 980315 355 (1.4+ 2.3-) 041024 170 0.1+ 0.3- 980125 897 0.8- 0.2+ 980315 897 0.2+ 1.0- 980125 897 0.9- 0.2+ 980315 897 0.1- 1.0- ( ) -------- Rejected Obs.

Director, Computing Section Syuichi Nakano 2004 Oct. 26

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