OAA computing section circular NK 843 32P/Comas-Sola
The following improved orbital elements, by S. Nakano, are from 208 observations 1977 to 1997, 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 +/- 0.89 arc second. Epoch = 1996 June 6.0 TT T = 1996 June 10.47947 +/- 0.00076 (m.e.) TT Peri. = 45.76389 +/- 0.00027 Node = 60.87247 +/- 0.00015 (2000.0) Inc. = 12.91635 +/- 0.00004 q = 1.8463655 +/- 0.0000018 AU e = 0.5677930 +/- 0.0000003 a = 4.2719470 +/- 0.0000012 AU n' = 0.11162598 +/- 0.00000005 P = 8.830 +/- 0.0000039 years A1 = +0.596 +/- 0.052 A2 = -0.10874 +/- 0.00078 T = 1978 Sept.24.22280 TT Epoch = 1978 Sept. 9.0 TT Peri. = 42.86223 e = 0.5658153 Node = 63.10096 (2000.0) a = 4.3066149 AU Inc. = 12.95989 n'= 0.11028083 q = 1.8698662 AU P = 8.937 years T = 1987 Aug. 18.68756 TT Epoch = 1987 Sept. 2.0 TT Peri. = 45.54110 e = 0.5698153 Node = 61.05683 (2000.0) a = 4.2546021 AU Inc. = 12.95483 n'= 0.11230928 q = 1.8302646 AU P = 8.776 years The predicted orbit for the 2005 return is as follows: T = 2005 Apr. 1.32375 TT Epoch = 2005 Apr. 20.0 TT Peri. = 45.82493 e = 0.5692423 Node = 60.79461 (2000.0) a = 4.2553283 AU Inc. = 12.92751 n'= 0.11228053 q = 1.8330152 AU P = 8.778 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1977/ 950823 360 1.1- 0.1- 951217 801 0.6+ 0.7- 770911 801 1.0- 1.5- 950825 950 0.2- 0.7+ 951218 801 1.9+ 0.6+ 770912 801 1.1+ 1.1- 950830 693 0.9- 0.9- 951222 410 1.0+ 1.5+ 771011 801 (4.7+ 3.5+) 950830 693 1.0- 1.0- 951222 410 (3.2+ 1.6+) 771115 801 (3.4+ 0.0 ) 950830 693 0.8- 1.0- 951222 410 1.1+ 0.7+ 1978/ 950830 693 0.8- 1.2- 951224 897 (2.1+ 0.7+) 781108 372 (5.3- 3.9+) 950903 691 0.7- 0.2+ 951224 897 1.8+ 0.8+ 781203 323 0.7+ 1.3+ 950903 691 0.7- 0.1+ 951227 605 (2.0+ 0.3-) 781207 801 (2.9+ 2.6+) 950903 691 0.9- 0.2- 951227 605 1.9+ 0.6+ 781230 879 (1.0+ 2.6+) 950905 046 1.0- 0.1- 951227 605 0.7+ 0.7- 781230 879 (0.9+ 6.7+) 950905 046 0.8- 0.1+ 951228 691 0.4+ 0.4- 1979/ 950905 046 1.1- 0.0 1996/ 790105 801 1.4+ 0.6+ 950905 360 1.3- 0.6- 960104 605 (2.2+ 1.9-) 790123 801 (2.0+ 3.4+) 950905 360 1.3- 0.6- 960104 605 0.5- 0.0 790124 381 0.2- 1.4+ 950918 046 1.6- 0.1- 960108 605 (0.8+ 2.5-) 790201 323 (3.5+ 0.1-) 950918 046 1.6- 0.1+ 960108 605 (2.5+ 1.9-) 790221 323 1.1- 2.0+ 950918 046 1.0- 0.2- 960112 360 1.4+ 0.3+ 790226 046 1.2+ 0.4- 950920 360 1.1- 0.5- 960112 360 1.6+ 0.1- 790226 046 0.7+ 0.4+ 950920 360 1.4- 0.6- 960113 118 0.5+ 0.3- 790227 046 (3.1+ 1.4-) 950920 360 1.2- 0.2- 960114 046 1.4+ 0.0 790227 046 2.0+ 1.1+ 950926 118 1.5- 0.3+ 960114 046 1.5+ 0.0 790301 801 2.1+ 1.7+ 950926 118 1.6- 0.4+ 960114 046 1.6+ 0.1- 790302 046 0.8- 0.4- 951003 900 1.3- 0.6+ 960115 605 (3.3+ 0.2+) 790302 046 1.8+ 0.1- 951004 966 (2.9- 1.5+) 960115 605 1.1+ 1.0- 790303 323 (0.8+ 2.5+) 951005 966 1.6- 1.2+ 960115 605 0.0 0.6- 790304 046 2.2- 0.2- 951013 900 1.9- 0.2+ 960119 605 (3.0- 2.6-) 790304 046 2.0- 0.5- 951013 900 (2.1- 0.1-) 960119 605 (5.6+ 0.8+) 790319 046 1.0+ 1.2- 951014 410 1.1- 0.2+ 960119 605 (4.5- 6.0+) 790319 046 0.1+ 0.1- 951014 410 (2.2- 0.4+) 960121 691 0.2+ 0.3- 790322 323 (0.9+ 2.9+) 951014 410 1.1- 0.7+ 960121 118 0.6+ 1.2+ 790322 046 0.0 0.0 951017 360 0.5- 0.2- 960121 118 1.1+ 1.3+ 790322 046 (2.7+ 0.4-) 951017 360 0.6- 0.2- 960124 897 1.8+ 0.6+ 790324 046 1.4+ 0.4- 951020 897 0.9- 1.2+ 960124 897 (2.1+ 1.6+) 790324 046 2.0- 1.1- 951020 897 1.3- 0.7+ 960129 605 (9.1+ 3.7+) 790327 801 (4.4+ 1.0+) 951020 410 1.0- 0.4+ 960129 605 0.5- 1.1+ 790422 801 (3.9+ 1.5+) 951020 410 1.2- 1.5+ 960131 046 1.6+ 0.5+ 790422 046 1.4- 0.1+ 951020 410 1.1- 0.9+ 960131 046 1.8+ 0.3+ 790422 046 0.4- 1.3- 951020 360 1.0- 0.1- 960131 046 1.0+ 0.2+ 790426 323 (7.1+ 0.1-) 951020 360 0.9- 0.1- 960207 107 (2.2+ 1.4+) 1986/ 951026 360 0.5- 0.1- 960207 107 1.5+ 0.4+ 860728 675 0.0 1.2- 951026 360 0.4- 0.3- 960209 107 (3.7+ 1.2+) 860728 675 0.1- 1.4- 951027 410 0.1- 0.9+ 960209 107 (4.0+ 0.5+) 860730 691 1.9+ 1.9+ 951027 410 0.7- 0.6+ 960219 360 0.3+ 0.8- 860730 691 1.7+ 1.6+ 951027 410 0.5- 0.9+ 960219 360 0.1+ 1.0- 860730 691 1.5+ 1.1+ 951027 118 0.0 0.2+ 960219 897 0.9+ 0.0 860731 691 1.2+ 0.7+ 951031 118 0.0 0.1+ 960219 897 0.8+ 0.4- 860731 691 1.0+ 1.5+ 951102 900 0.2+ 1.5+ 960301 605 1.9+ 0.0 860831 691 0.1- 0.3- 951102 900 0.1- 1.1+ 960301 605 0.9+ 0.7- 860831 691 0.1+ 0.6- 951104 897 0.1+ 0.1+ 960301 605 1.3+ 0.1- 860831 691 0.1+ 0.5- 951104 897 0.3+ 0.7- 960310 360 0.5- 0.9- 860831 691 0.3- 0.2- 951112 900 0.4+ 0.9+ 960310 360 0.3- 0.7- 860902 691 0.5+ 1.1- 951112 900 0.4+ 0.4+ 1997/ 860902 691 0.1+ 0.5- 951112 359 0.2- 0.4+ 970118 360 1.0- 0.3- 860902 691 0.1- 0.8- 951112 359 0.8+ 0.1- 970118 360 1.1- 0.5- 860926 691 0.1+ 0.9- 951116 360 0.8+ 0.7- 970209 360 0.9- 0.4+ 860926 691 0.2- 0.1+ 951116 360 0.4+ 0.8- 970209 360 0.9- 0.3+ 860926 691 0.2- 0.4- 951118 801 0.9+ 0.4- 970305 118 0.4- 0.3+ 861130 691 1.1+ 0.0 951118 801 0.7+ 0.9- 970306 118 0.6- 0.3+ 861130 691 1.5+ 0.5+ 951118 410 (2.1+ 1.2+) 970307 118 1.3- 0.9- 861130 691 1.3+ 0.1- 951118 410 (2.4+ 2.2+) 970307 118 1.4- 0.8- 1988/ 951118 410 (2.1+ 2.2+) 970309 118 0.9- 0.3- 880121 691 1.5- 1.2+ 951118 900 0.8+ 0.2- 970309 118 1.0- 0.5- 880121 691 1.9- 0.9+ 951120 605 (0.3+ 7.5+) 970402 118 0.5- 0.1+ 880215 801 0.7+ 1.3+ 951120 605 0.3- 1.3+ 970402 118 0.6- 0.1+ 880312 897 (3.3- 0.8+) 951121 360 0.6+ 0.8- 970407 360 0.2+ 0.3+ 880312 897 (0.8+ 2.7+) 951121 360 0.5+ 0.8- 970407 360 0.1+ 0.1+ 880320 807 0.7- 0.5+ 951124 897 (6.3+ 3.1+) 970417 568 0.1- 0.4+ 880321 807 1.6+ 0.5- 951124 897 (8.9+ 1.8+) 970417 568 0.1+ 0.3+ 880321 807 0.2- 0.6+ 951125 410 1.4+ 0.2- 970428 118 0.5+ 0.1+ 880321 807 1.9+ 1.5+ 951125 410 1.0+ 0.7- 970428 118 0.6+ 0.0 880322 807 0.7+ 0.4+ 951125 410 1.5+ 0.6+ 970429 118 0.5+ 0.1- 880322 807 0.5+ 0.5+ 951125 605 (2.2+ 0.1+) 970429 118 0.0 0.2- 880322 807 0.7+ 1.1+ 951125 605 1.1+ 0.6+ 970429 118 0.7+ 0.1- 880412 691 0.9- 0.5+ 951125 605 1.7+ 0.6- 970430 118 0.5+ 0.7- 880412 691 0.9- 0.5+ 951206 608 0.2+ 0.3- 970430 118 0.3+ 0.8- 880519 568 (4.3+ 5.9+) 951206 608 0.2+ 0.3- 970504 360 0.7+ 0.3- 1995/ 951208 608 0.5+ 0.4- 970504 360 1.0+ 0.4- 950801 691 0.4- 0.2+ 951208 608 0.6+ 0.4- 970504 118 0.6+ 0.6- 950801 691 0.1- 0.3+ 951210 359 0.3- 0.8+ 970504 118 0.4+ 0.6- 950802 691 0.4- 0.6- 951210 359 0.4- 0.1+ 970514 118 0.0 1.1- 950802 691 0.1+ 0.1+ 951210 359 (2.3+ 0.3+) 970514 118 0.7+ 0.9- 950803 360 0.9- 0.3- 951212 897 (3.7+ 1.9+) 970531 691 1.0+ 1.3- 950803 360 1.4- 0.4- 951212 897 (3.3+ 0.7+) 970531 691 0.4+ 0.9- 950803 360 1.2- 0.5- 951213 605 0.5- 0.9+ 970531 691 1.1+ 0.9- 950807 360 1.6- 0.3- 951213 605 1.7+ 1.8- 970601 118 0.4- 0.1+ 950807 360 1.3- 0.3- 951215 605 1.6+ 0.1- 970601 118 0.3- 0.7- 950807 360 0.8- 0.6- 951215 605 (3.3+ 0.8-) 970625 118 1.3+ 0.1- 950823 360 1.4- 0.2- 951215 605 (2.2+ 0.4+) 970625 118 0.8+ 0.3- ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2002 May 7