OAA computing section circular NK 794 69P/Taylor
The following improved orbital elements, by S. Nakano, are from 357 observations 1990-1999, including planetary perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas, Vesta, and non-gravitational effect of style II. The mean residual is +/- 2.19 arc seconds. See an orbit on MPC 23484. Epoch = 1997 Dec. 18.0 TT T = 1997 Dec. 12.27621 +/- 0.00194 (m.e.) TT Peri. = 355.37862 +/- 0.00092 Node = 108.85843 +/- 0.00012 (2000.0) Inc. = 20.54722 +/- 0.00009 q = 1.9478480 +/- 0.0000103 AU e = 0.4659700 +/- 0.0000067 a = 3.6474509 +/- 0.0000136 AU n' = 0.14148809 +/- 0.00000079 P = 6.966 +/- 0.0000391 years A1 = +4.270 +/- 0.664 A2 = +0.43499 +/- 0.14387 T = 1990 Dec. 28.89381 TT Epoch = 1990 Dec. 15.0 TT Peri. = 355.57144 e = 0.4655691 Node = 108.87014 (2000.0) a = 3.6491377 AU Inc. = 20.55188 n'= 0.14139000 q = 1.9502120 AU P = 6.971 years The predicted orbit for the 2004 return is as follows: T = 2004 Nov. 30.57692 TT Epoch = 2004 Nov. 11.0 TT Peri. = 355.52174 e = 0.4669293 Node = 108.79689 (2000.0) a = 3.6428177 AU Inc. = 20.56360 n'= 0.14175811 q = 1.9418794 AU P = 6.953 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1990/ 980118 403 0.4- 1.4- 980226 107 (3.3+ 1.0-) 901111 691 0.7- 0.2+ 980118 897 0.3- 0.9- 980228 610 0.8+ 0.8- 901111 691 0.7- 0.2- 980118 897 0.2- 0.8- 980228 610 1.0+ 1.1- 901111 691 0.4- 0.5+ 980118 897 0.2- 0.7- 980228 610 1.1+ 1.2- 901111 372 0.3- 1.9+ 980119 954 0.1- 0.6- 980228 610 1.2+ 1.5- 901112 691 0.4- 0.7+ 980119 954 0.1- 0.5- 980228 610 1.3+ 1.6- 901112 691 0.7- 0.3+ 980119 954 0.1- 0.5- 980302 403 0.8+ 1.9- 901112 691 0.2- 0.5+ 980119 954 0.1- 0.5- 980302 403 1.7+ 2.1- 901112 691 0.9- 0.3+ 980119 954 0.1- 0.5- 980302 360 0.7+ 0.9- 901112 691 0.0 0.7+ 980119 954 0.1- 0.5- 980302 360 0.7+ 0.9- 901115 801 2.0- 1.6+ 980119 954 0.0 0.6- 980302 352 1.5+ 1.9- 901115 801 1.6- 1.8+ 980119 954 0.0 0.5- 980302 352 1.9+ 2.1- 901121 801 (2.6- 0.2+) 980119 954 0.0 0.6- 980302 352 0.9+ 1.8- 901121 801 0.9+ 2.1+ 980119 954 0.2- 0.5- 980302 897 1.3+ 1.5- 901213 801 1.2+ 1.3+ 980119 954 0.2- 0.5- 980302 897 1.3+ 1.7- 901213 801 (1.4- 2.5+) 980119 954 0.1- 0.6- 980303 402 1.0+ 0.9- 901217 801 (4.2- 2.5+) 980119 954 0.0 0.5- 980303 402 0.9+ 0.9- 901217 801 (0.9- 2.5+) 980119 954 0.0 0.6- 980303 402 0.9+ 0.8- 901219 372 (1.4- 3.1+) 980119 954 0.0 0.5- 980305 372 1.6+ 0.1+ 901224 372 (1.7- 2.9+) 980119 954 0.2- 0.6- 980310 610 1.3+ 1.9- 1991/ 980119 954 0.1- 0.5- 980310 610 1.4+ 2.1- 910105 657 (0.2- 3.1+) 980119 954 0.2- 0.6- 980310 610 1.3+ 2.1- 910105 657 0.6- 1.9+ 980119 954 0.0 0.5- 980312 900 1.4+ 1.4- 910106 372 0.3+ 2.2+ 980119 954 0.1- 0.6- 980312 900 0.6+ 1.1- 910108 897 (1.7+ 4.1+) 980119 954 0.2- 0.5- 980314 610 (0.8- 3.0-) 910108 897 1.7- 2.1+ 980119 954 0.2- 0.5- 980315 355 (2.6+ 2.7-) 910113 071 (0.8- 4.2+) 980119 954 0.2- 0.5- 980315 355 (2.8+ 2.6-) 910114 801 0.6+ 1.8+ 980119 954 0.2- 0.6- 980315 355 2.1+ 2.3- 910114 801 0.4+ 2.0+ 980119 954 0.2- 0.4- 980315 897 0.9+ 1.1- 910116 801 0.0 1.2+ 980119 954 0.2- 0.5- 980315 897 0.6+ 1.0- 910116 801 0.0 1.1+ 980119 954 0.1- 0.6- 980315 897 1.4+ 1.6- 910116 071 (1.2+ 2.9+) 980119 954 0.1- 0.5- 980316 372 0.3+ 0.2- 910117 071 1.2- 2.0+ 980119 954 0.1- 0.5- 980316 610 0.8+ 1.0- 910119 675 (2.7+ 1.2+) 980119 954 0.1- 0.5- 980316 610 0.6+ 1.0- 910119 675 1.6+ 2.1+ 980121 355 0.3- 0.7- 980316 610 0.3+ 1.0- 910122 897 0.1+ 0.2- 980121 355 0.5- 0.6- 980317 372 0.8+ 0.9+ 910122 897 1.9+ 0.1+ 980124 118 0.5- 0.7- 980317 897 0.2+ 1.2- 910205 376 (3.7- 1.3+)Y 980124 118 0.3- 0.8- 980317 897 0.7+ 1.4- 910212 897 (2.9+ 4.9-) 980125 897 0.1- 1.1- 980317 897 0.6+ 0.9- 910212 897 0.2+ 2.2- 980125 897 0.2- 1.1- 980318 372 0.5+ 0.3+ 910213 801 0.2- 2.0- 980125 127 0.5+ 1.6- 980318 610 1.7+ 0.8- 910213 801 (0.9- 2.8-) 980125 127 0.4- 1.9- 980318 610 1.8+ 1.3- 910217 801 0.9+ 2.3- 980125 127 0.1- 1.6- 980318 610 2.0+ 1.4- 910217 801 1.1+ 2.3- 980126 118 0.0 0.6- 980318 610 1.9+ 1.5- 910313 801 0.3- 2.3- 980126 118 0.0 1.1- 980318 143 (4.4+ 2.8-) 910313 801 (0.1- 2.6-) 980126 700 0.0 1.0- 980318 143 (3.6+ 2.6-) 910317 801 0.9- 2.3- 980126 700 0.1- 0.9- 980318 143 (3.1+ 3.0-) 910317 801 (1.1- 3.8-) 980126 372 0.1+ 0.5- 980320 118 1.0+ 1.1- 910321 801 (2.5+ 4.4-) 980127 372 0.1+ 0.4- 980320 118 1.4+ 1.1- 910321 801 (1.6+ 4.2-) 980128 566 0.2- 2.3- 980322 897 0.4+ 1.8- 1997/ 980128 566 (0.3- 3.5-) 980322 897 0.9+ 1.4- 971008 402 1.3- 1.7- 980128 566 (0.4- 3.2-) 980322 360 0.1+ 0.6- 971008 402 1.5- 1.7- 980128 403 0.3+ 1.6- 980322 360 0.1+ 0.7- 971008 402 (3.4- 0.6+) 980128 403 0.3+ 2.1- 980322 610 0.2- 0.8- 971012 402 0.9- 2.2- 980128 403 0.4+ 1.6- 980322 610 0.5- 1.9- 971012 402 0.6- 1.2- 980129 700 0.5+ 1.4- 980323 118 0.1+ 1.2- 971012 402 1.0- 2.1- 980129 700 0.2+ 1.2- 980323 118 0.3+ 0.8- 971012 402 1.2- 2.2- 980129 700 0.7+ 0.8- 980325 610 0.9+ 0.5- 971012 402 1.0- 1.5- 980129 403 0.1+ 1.8- 980325 610 1.0+ 0.9- 971012 867 1.2- 2.2- 980129 403 0.8+ 2.1- 980325 610 1.2+ 1.3- 971013 867 0.8- 0.5- 980129 360 0.7+ 0.4- 980325 610 1.4+ 1.7- 971013 867 1.4- 0.9- 980129 360 0.7+ 0.4- 980325 610 1.5+ 2.0- 971101 402 0.7- 1.7- 980129 372 0.1+ 0.4+ 980325 143 (3.4+ 1.2-) 971101 402 0.1- 2.1- 980129 143 1.0+ 1.3- 980325 143 (2.8+ 1.6-) 971101 402 0.4- 0.9- 980129 143 1.0+ 1.3- 980325 143 2.1+ 1.0- 971103 360 0.2+ 1.0- 980129 143 1.2+ 1.4- 980331 897 0.6+ 0.5- 971103 360 0.3+ 1.1- 980130 403 0.8+ 1.5- 980331 897 0.7+ 1.6- 971107 867 0.1- 1.9- 980130 403 0.9+ 0.6- 980331 897 0.5+ 1.4- 971107 867 0.6- 1.8- 980130 403 0.1- 1.3- 980404 897 (1.6+ 2.5-) 971109 360 0.2- 1.4- 980202 360 0.7+ 1.3- 980404 897 1.6+ 2.2- 971109 360 0.5- 1.2- 980202 360 0.7+ 1.4- 980408 965 0.8+ 0.6+ 971124 897 (3.2- 1.9-) 980203 046 0.5+ 1.0- 980408 965 0.1+ 0.3- 971124 897 1.8- 1.8- 980203 046 0.5+ 1.1- 980408 965 0.1+ 0.8- 971124 897 0.8- 1.7- 980203 046 0.5+ 1.0- 980414 118 0.7+ 0.1+ 971203 897 0.0 1.4- 980204 118 0.6+ 1.7- 980415 118 0.8+ 0.2+ 971203 897 0.8- 1.1- 980204 118 0.7+ 1.2- 980418 699 (5.3+ 2.7-) 971204 402 0.0 1.2- 980204 118 0.9+ 1.3- 980418 699 (4.8+ 4.5-) 971204 402 0.1- 1.2- 980204 897 0.6+ 1.0- 980418 699 (3.8+ 3.1-) 971204 402 0.3- 1.4- 980204 897 0.7+ 0.9- 980419 699 (4.9+ 3.9-) 971204 360 0.3+ 1.2- 980204 897 0.6+ 0.8- 980419 699 (4.9+ 4.6-) 971204 360 0.2+ 1.1- 980204 372 1.2+ 0.3- 980419 699 (2.2+ 2.5-) 971204 360 0.3+ 1.1- 980204 046 0.6+ 0.4- 980419 402 0.5+ 0.1- 971204 867 0.6- 0.7- 980204 046 0.6+ 0.4- 980419 402 0.3+ 0.6- 971204 867 0.7- 0.9- 980204 046 0.6+ 0.4- 980419 402 0.3+ 0.6- 971206 954 0.5+ 0.9- 980205 118 1.1+ 1.3- 980419 897 0.1+ 0.9- 971206 954 0.4+ 0.8- 980205 118 1.1+ 1.1- 980419 897 0.6+ 1.3- 971206 954 0.4+ 0.8- 980205 118 1.1+ 1.1- 980419 360 0.2- 0.2- 971206 954 0.5+ 0.8- 980205 403 1.0+ 1.6- 980419 360 0.3- 0.3- 971206 954 0.4+ 0.8- 980205 403 1.0+ 2.2- 980419 897 1.0+ 0.7- 971210 372 0.2- 0.5- 980205 403 0.6+ 1.4- 980419 143 0.3+ 0.6- 971211 372 0.1+ 0.2- 980206 118 0.4+ 1.3- 980419 143 0.6+ 0.5- 971221 372 0.4- 0.4+ 980206 118 0.6+ 1.2- 980419 143 1.3+ 0.3- 971221 897 0.3+ 1.0- 980207 118 0.5+ 1.3- 980421 610 1.5+ 1.0- 971221 897 0.5+ 0.7- 980207 118 0.4+ 1.4- 980421 610 1.0+ 0.9- 971224 900 0.3- 0.5- 980207 118 0.3+ 1.0- 980421 610 0.7+ 0.9- 971224 900 0.4- 0.2- 980207 118 0.3+ 0.8- 980421 610 0.1- 0.9- 971224 360 0.4+ 0.8- 980207 118 0.2+ 0.8- 980421 143 0.6+ 0.7- 971224 360 0.5+ 0.8- 980208 900 0.4+ 0.6- 980421 143 0.3+ 0.1- 971225 402 0.5+ 0.8- 980208 900 0.4+ 0.7- 980421 143 0.3+ 0.2- 971225 402 0.4+ 0.7- 980210 403 0.5+ 0.8- 980421 143 1.2+ 0.6- 971225 402 0.4+ 0.7- 980210 403 0.9+ 0.9- 980427 867 0.5+ 0.6- 971227 403 0.1+ 0.1- 980215 403 1.3+ 1.8- 980427 867 0.9+ 0.2- 971227 403 0.5+ 0.6- 980215 403 1.5+ 1.3- 980427 372 0.0 0.3+ 971227 372 0.0 0.4+ 980215 610 0.7+ 0.8- 980427 118 0.2+ 0.1- 971228 372 0.0 0.4- 980215 610 0.7+ 0.9- 980427 118 0.3+ 0.3- 971228 372 0.8- 0.4- 980215 610 0.7+ 1.1- 980510 605 0.3+ 1.2- 971231 355 0.7- 0.7- 980217 403 1.8+ 1.6- 980510 605 2.2+ 2.3- 971231 355 1.0- 0.6- 980217 403 1.8+ 2.0- 980510 605 0.3+ 0.2- 971231 355 0.9- 0.6- 980217 372 0.3+ 0.8- 980511 118 0.5+ 0.3- 971231 403 0.6- 0.2- 980217 897 1.1+ 1.5- 980511 118 0.6+ 0.3- 971231 403 1.8- 0.8- 980217 897 0.9+ 1.4- 980519 360 0.7+ 1.7+ 1998/ 980218 118 0.9+ 1.2- 980519 360 0.8+ 1.2+ 980101 372 0.3+ 0.8+ 980218 118 1.4+ 1.1- 980520 897 1.3+ 1.3- 980102 867 0.2- 0.5- 980218 867 1.1+ 1.1- 980520 897 2.0+ 0.3- 980102 867 0.3- 0.6- 980218 867 0.8+ 1.0- 980520 897 (2.9+ 0.8+) 980104 897 0.8- 0.6- 980218 610 0.8+ 1.2- 980520 372 2.1+ 1.0- 980104 897 0.8- 0.2- 980218 610 0.9+ 1.3- 980529 118 1.0+ 0.4+ 980105 352 1.8- 0.3- 980218 610 0.9+ 1.3- 980529 118 0.7+ 0.5+ 980105 352 0.9- 0.4- 980220 118 0.7+ 1.3- 980531 897 0.2+ 0.2- 980105 352 1.1- 0.2- 980220 118 0.9+ 1.4- 980531 897 0.6- 0.4- 980105 900 0.5- 0.0 980220 118 0.8+ 1.4- 980531 897 1.0+ 0.5+ 980105 900 0.6- 0.4- 980221 118 0.5+ 1.4- 980602 118 0.8+ 0.1+ 980105 403 0.6- 0.7- 980221 360 0.6+ 0.9- 980602 118 0.3+ 0.2+ 980105 403 0.1+ 0.6- 980221 360 0.6+ 1.0- 980617 360 0.3- 0.0 980105 372 0.4- 0.4- 980221 970 1.0+ 1.2- 980617 360 0.1- 0.0 980106 372 0.1+ 0.3- 980221 970 (1.2+ 2.4-) 980619 696 0.5- 0.1- 980108 118 0.5- 0.6- 980221 970 0.8+ 1.9- 980619 696 0.5- 0.1+ 980109 118 0.5- 0.3- 980221 970 1.1+ 1.3- 980619 696 0.6- 0.0 980109 118 0.5- 0.2- 980221 970 1.1+ 1.6- 1999/ 980111 118 0.3- 1.0- 980222 900 1.2+ 1.3- 990213 693 1.2+ 1.2+ 980111 118 0.2- 1.0- 980222 900 1.2+ 1.6- 990213 693 1.4+ 1.3+ 980116 403 0.4- 0.9- 980222 118 1.0+ 0.3- 990213 693 1.4+ 1.2+ 980116 403 0.0 0.8- 980222 118 0.6+ 0.6- 990415 693 (0.1- 3.5+) 980118 758 0.8- 1.1- 980225 120 (2.4+ 0.8-) 990415 693 (0.3- 3.8+) 980118 758 1.1- 1.3- 980225 120 1.8+ 1.7- 990415 693 (0.4+ 4.0+) 980118 403 0.0 0.8- 980226 107 (2.6+ 3.1-) ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2001 Apr. 28