OAA computing section circular NK 667 73P/Schwassmann-Wachmann 3 = Nucleus A in 1995/1996
The following improved orbital elements, by S. Nakano, are from 236 observations 1989-1996, 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 +/- 0.93 arc second. Epoch = 1995 Oct. 10.0 TT T = 1995 Sept.22.88978 +/- 0.00007 (m.e.) TT Peri. = 198.76947 +/- 0.00019 Node = 69.94637 +/- 0.00017 (2000.0) Inc. = 11.42391 +/- 0.00002 q = 0.9327810 +/- 0.0000008 AU e = 0.6948487 +/- 0.0000007 a = 3.0567817 +/- 0.0000023 AU n' = 0.18441975 +/- 0.00000021 P = 5.344 +/- 0.0000061 years A1 = +0.918 +/- 0.016 A2 = +0.21970 +/- 0.00436 A3 = -0.20622 +/- 0.00891 T = 1990 May 19.30094 TT Epoch = 1990 May 29.0 TT Peri. = 198.80814 e = 0.6940006 Node = 69.93475 (2000.0) a = 3.0597522 AU Inc. = 11.41232 n'= 0.18415126 q = 0.9362822 AU P = 5.352 years The predicted orbit for the 2001 return is as follows: T = 2001 Jan. 27.79061 TT Epoch = 2001 Jan. 11.0 TT Peri. = 198.77667 e = 0.6938245 Node = 69.92058 (2000.0) a = 3.0615964 AU Inc. = 11.40633 n'= 0.18398489 q = 0.9373858 AU P = 5.357 years The following residuals in seconds of arc are from the above orbital elements: 1989/ 950617 118 0.7+ 1.3+ 951223 693 0.7+ 0.7+ 891205 568 (4.7- 1.6-)Y 950620 360 0.5+ 0.2+ 951223 568 0.3+ 1.0+ 891205 568 (3.7- 1.2-)Y 950620 360 0.3+ 0.2+ 951223 568 0.4+ 0.5+ 891205 568 (4.2- 1.0-)Y 950620 360 1.2+ 0.5+ 951224 568 1.4- 0.3+ 891205 568 (4.2- 1.7-)Y 950628 118 0.2- 1.2+ 951224 568 1.0- 2.0+ 891205 568 (3.3- 1.9-)Y 950629 118 0.1- 0.2+ 951224 422 0.0 0.4+ 891209 675 0.7+ 0.1- 950630 118 1.1+ 0.7+ 951224 422 1.5- 0.3- 891209 675 1.4+ 0.3- 950701 118 0.2+ 0.6+ 951225 568 1.1- 0.4+ 891209 675 1.6+ 0.5- 951006 897 (2.8+ 2.7-)Y 951225 568 1.4- 0.4+ 891209 675 0.9+ 0.3- 951007 422 1.3- 1.4+ 951227 691 0.8- 0.0 891212 675 1.1+ 0.1- 951007 422 1.6- 1.2+ 951227 691 0.6- 0.2+ 891212 675 1.2+ 0.0 951009 422 1.1- 1.6+ 951228 118 0.6- 0.1+ 891212 675 0.4+ 1.1- 951009 422 0.8- 2.2+ 951228 118 0.2+ 0.1- 891212 675 0.9+ 0.7- 951009 415 2.3- 0.1- 951228 118 0.8+ 0.4+ 1990/ 951009 415 1.1- 0.6- 951229 764 1.9- 0.7- 900223 657 (3.2- 4.2+) 951009 415 1.5- 0.6+ 951229 118 0.2- 0.1- 900223 657 (2.6- 2.4+) 951012 422 1.4- 0.6+ 951229 118 0.4+ 0.1+ 900223 657 (1.8- 2.5+) 951012 422 1.6- 0.5+ 951229 118 1.2- 1.1- 900226 801 1.8- 0.5- 951012 372 1.0+ 0.5+ 1996/ 900226 801 2.0- 1.4- 951013 372 (4.0- 2.2+) 960102 834 (3.2+ 1.4+) 900226 657 (3.7- 1.3+) 951013 372 1.5- 1.4+ 960104 413 0.1+ 0.3- 900227 801 0.8- 0.9- 951013 367 0.2- 1.1+ 960104 413 0.0 0.9- 900301 413 0.4+ 0.1+ 951013 367 0.1- 0.9+ 960109 372 (1.8- 2.6-) 900301 413 (6.2- 1.4+) 951013 367 0.7- 0.3+ 960109 413 0.3+ 0.0 900304 413 (2.9- 0.2+) 951013 367 0.3+ 0.6+ 960109 413 0.0 0.3- 900304 413 (2.8- 0.0 ) 951014 897 (1.2+ 3.1+) 960109 413 0.1- 0.5- 900307 413 (2.4+ 0.9-) 951014 897 1.8+ 1.7+ 960109 413 0.0 0.2- 900307 413 1.6- 0.1- 951014 422 0.1- 1.4+ 960110 413 1.1+ 0.3+ 900320 897 0.3+ 0.1+ 951014 422 0.2+ 1.0+ 960110 413 1.2+ 0.1+ 900320 897 0.3+ 0.4- 951014 422 0.1+ 1.1+ 960110 413 1.1+ 0.2+ 900322 801 2.3- 0.3+ 951016 422 1.0+ 0.6+ 960111 360 1.3+ 0.1- 900322 801 0.2- 0.5- 951016 422 1.1+ 0.7+ 960111 360 1.2+ 0.1+ 900322 801 0.2+ 1.5- 951019 323 0.0 0.8+ 960111 360 1.3+ 0.1- 900324 801 0.1+ 0.5- 951023 897 0.9+ 0.1+ 960112 372 (0.1+ 2.6-) 900326 801 1.4+ 0.4- 951023 897 0.0 0.3- 960113 118 1.4+ 0.3+ 900326 801 0.7- 0.4+ 951027 897 0.3+ 0.5- 960114 118 1.4+ 0.2- 900326 323 0.4- 0.5- 951027 897 0.3- 0.1- 960115 118 1.8+ 0.3+ 900327 657 1.1+ 2.0- 951027 422 0.1+ 1.0+ 960115 118 0.9+ 0.3- 900327 657 0.3- 1.6- 951027 422 0.2+ 1.0+ 960116 046 0.3+ 0.5- 900329 801 0.2- 0.2+ 951028 693 1.3- 0.4+ 960116 046 0.2- 0.5- 900329 801 0.2- 0.3+ 951028 693 2.1- 0.9+ 960116 046 0.5+ 0.1- 900423 801 2.3+ 0.8+ 951028 693 2.1- 0.9+ 960117 118 1.3+ 1.1- 900425 675 (8.1+ 0.0 ) 951029 413 0.8- 1.1+ 960117 118 0.5+ 1.5- 900426 675 0.4- 1.2+ 951029 413 0.7- 1.1+ 960119 691 0.4- 0.7- 900521 372 1.5- 2.0+ 951030 897 1.0- 0.6+ 960119 691 0.3- 1.1- 900620 323 1.4+ 0.8+ 951030 897 0.7- 0.6+ 960119 691 0.4- 0.5- 900916 801 0.7- 1.1- 951103 323 0.5+ 0.4+ 960121 691 1.0+ 1.3+ 900916 801 0.9- 1.3- 951105 897 1.7+ 0.3+ 960121 691 1.1+ 1.4+ 900918 801 1.0- 0.7- 951105 897 2.1+ 0.4+ 960121 691 1.1+ 1.5+ 900918 801 1.1- 1.0- 951108 415 (2.6+ 1.0-) 960121 691 1.1+ 1.4+ 901017 801 0.2- 0.5+ 951112 415 1.4+ 1.4- 960121 118 1.8+ 0.6+ 901017 801 1.0- 0.3+ 951113 897 0.3- 0.6+ 960121 118 1.0+ 0.4+ 901021 801 1.7- 0.4- 951113 897 0.1- 1.0+ 960126 413 0.2- 0.2- 901021 801 0.3- 0.4- 951116 360 0.3+ 1.0+ 960126 413 0.5+ 0.0 1994/ 951116 360 0.4+ 0.9+ 960127 413 0.4+ 0.4+ 941228 493 1.0- 1.1+ 951118 900 2.0+ 0.5+ 960127 413 0.5+ 0.2+ 941228 493 0.8- 1.4+ 951124 897 0.8+ 1.0+ 960205 118 0.1- 1.0- 941228 493 0.7- 0.9+ 951124 897 0.4+ 0.2+ 960205 118 0.3- 1.1- 941229 493 1.6- 1.7+ 951125 410 (7.9+ 2.5+) 960206 118 1.3+ 0.7- 941229 493 1.0- 1.0+ 951125 410 (7.6+ 1.9+) 960206 118 1.7+ 0.2- 941229 493 1.0- 0.7+ 951125 410 (7.6+ 1.7+) 960206 118 1.1+ 0.2- 941229 493 1.0- 0.6+ 951127 897 (2.9+ 0.3+) 960209 711 0.6+ 0.0 1995/ 951127 897 1.1+ 0.6+ 960209 711 0.4+ 0.3- 950128 691 0.5- 2.3+ 951127 897 0.4+ 0.5+ 960210 711 0.1+ 0.9- 950128 691 0.6- 2.3+ 951208 897 2.2+ 0.6+ 960210 711 0.1- 1.0- 950128 691 1.3- 2.3+ 951208 897 0.8+ 0.3+ 960215 693 0.2+ 0.4- 950403 360 1.2+ 0.5+ 951208 413 0.3+ 0.7+ 960215 693 0.8+ 0.2- 950403 360 1.0+ 0.1+ 951208 413 0.3+ 0.7+ 960215 693 0.3+ 0.4- 950403 360 0.9+ 1.0+ 951209 356 (2.7+ 2.5+) 960216 693 1.3+ 0.9+ 950420 360 0.1+ 0.5- 951209 356 1.7+ 1.6+ 960216 693 1.1+ 0.7+ 950420 360 0.2+ 0.5- 951209 356 (2.5+ 0.5+) 960219 360 0.9- 1.0- 950420 360 0.1- 0.6- 951209 356 (2.7+ 1.7+) 960219 360 1.1- 1.9- 950426 360 1.9+ 0.6+ 951210 360 0.1+ 0.7+ 960910 809 0.2- 0.1+ 950426 360 2.1+ 0.4- 951210 360 0.3+ 0.7+ 960913 809 0.1- 0.0 950426 360 1.7+ 0.7- 951211 897 0.4- 0.2+ 960914 809 0.3- 0.2- 950505 118 1.5+ 0.2+ 951211 897 1.3+ 1.5- 960914 809 0.2+ 0.0 950505 118 0.3+ 0.2+ 951215 422 0.4+ 0.5- 960915 809 0.0 0.0 950507 118 0.3+ 0.4+ 951215 422 0.5+ 0.6- 960915 809 0.1- 0.1+ 950507 118 0.4- 0.4+ 951216 422 2.0+ 0.4- 960920 696 0.8- 0.6+ 950518 360 1.6+ 0.2+ 951216 422 0.5- 0.1- 960920 696 0.3+ 0.9+ 950518 360 1.5+ 0.1+ 951216 422 1.9+ 0.0 960920 696 0.3- 0.3+ 950518 360 1.5+ 0.0 951218 897 0.4- 0.8+ 960921 696 1.0- 0.1- 950523 360 0.8+ 0.7+ 951218 897 1.7- 0.1- 960921 696 0.6- 0.0 950523 360 0.6+ 0.9+ 951221 422 0.3+ 0.2+ 961118 696 1.0- 0.4- 950523 360 0.5+ 0.9+ 951221 422 1.3+ 0.1+ 961118 696 1.9- 0.3- 950525 693 0.1- 0.4+ 951221 422 1.4- 0.0 961118 696 1.1- 0.8- 950525 693 1.1+ 1.3+ 951222 897 2.2+ 0.9- 961119 696 0.6- 0.7+ 950525 693 1.6+ 1.6+ 951222 897 1.8+ 0.2- 961214 691 (2.3- 0.0 ) 950529 118 0.6+ 0.7- 951223 693 0.8+ 0.7+ 961214 691 0.7- 0.3+ 950615 118 0.8- 0.8+ 951223 693 0.8+ 0.7+ 961214 691 0.9- 0.6+ ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 1998 Apr. 28