OAA computing section circular NK 659 70P/Kojima
The following improved orbital elements, by S. Nakano, are from 115 observations 1970-1994. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.94 arc second. Epoch = 1994 Feb. 17.0 TT T = 1994 Feb. 17.99638 +/- 0.00020 (m.e.) TT Peri. = 348.51512 +/- 0.00164 Node = 154.82439 +/- 0.00162 (2000.0) Inc. = 0.87763 +/- 0.00004 q = 2.3990729 +/- 0.0000010 AU e = 0.3926444 +/- 0.0000003 a = 3.9500300 +/- 0.0000006 AU n' = 0.12554617 +/- 0.00000003 P = 7.851 +/- 0.0000018 years T = 1970 Oct. 7.05301 TT Epoch = 1970 Oct. 21.0 TT Peri. = 198.02753 e = 0.5148575 Node = 291.92151 (2000.0) a = 3.3615198 AU Inc. = 4.09435 n'= 0.15991918 q = 1.6308162 AU P = 6.163 years T = 1978 May 24.58296 TT Epoch = 1978 May 12.0 TT Peri. = 348.49049 e = 0.3929266 Node = 154.84062 (2000.0) a = 3.9510567 AU Inc. = 0.87514 n'= 0.12549724 q = 2.3985812 AU P = 7.854 years T = 1986 Apr. 4.70449 TT Epoch = 1986 Mar. 31.0 TT Peri. = 348.51572 e = 0.3907528 Node = 154.76553 (2000.0) a = 3.9619569 AU Inc. = 0.87600 n'= 0.12497969 q = 2.4138110 AU P = 7.886 years The predicted orbit for the 2000 return is as follows: T = 2000 Sept.14.84145 TT Epoch = 2000 Sept.13.0 TT Peri. = 1.96378 e = 0.4544870 Node = 119.29891 (2000.0) a = 3.6723116 AU Inc. = 6.59942 n'= 0.14005376 q = 2.0032938 AU P = 7.037 years The following residuals in seconds of arc are from the above orbital elements: 19/ 19/ 19/ 701227 380 (0.4- 3.3+) 710627 691 0.3+ 0.6+ 931209 691 1.4- 0.6- 701227 380 (2.0- 4.8+) 710627 691 0.5+ 0.2+ 931223 411 0.4- 0.9- 701229 380 (5.7+ 1.0-) 771112 801 0.3- 0.4+ 931223 411 0.0 0.3- 701229 380 0.2- 1.2- 771115 801 1.3- 1.7+ 931223 411 0.1- 0.3+ 701231 370 1.3+ 0.2+ 771205 372 (1.6- 2.7-) 940107 691 0.5- 0.5- 701231 370 2.1+ 1.6+ 771205 372 0.9- 1.0- 940107 691 1.5- 0.9- 710101 380 0.6- 0.5+ 771208 801 0.4+ 0.5- 940107 691 1.4- 1.0- 710101 370 1.3+ 1.5- 771208 675 0.5- 0.5- 940108 385 0.3+ 1.0- 710105 822 (8.5+ 2.0-) 771209 675 1.0+ 0.1- 940108 385 0.1- 1.0- 710105 822 (1.7- 3.5-) 771209 381 0.6- 0.3- 940108 385 0.3- 0.2- 710105 387 0.5+ 1.5+ 771210 801 (1.9+ 2.9-) 940108 360 0.1+ 1.0- 710105 387 0.7- 1.9+ 771210 381 0.4+ 0.4- 940108 360 0.2- 0.8- 710105 370 1.6- 0.4+ 771210 381 0.6+ 1.0- 940114 887 0.6+ 1.6- 710106 387 1.1+ 0.0 771220 372 (1.1- 2.7-) 940114 887 0.4+ 0.9- 710108 380 (2.5+ 1.3+) 780107 381 2.1- 1.2+ 940115 887 0.7- 0.7+ 710121 370 0.6- 0.8+ 780114 879 1.5- 2.0- 940115 372 1.3- 0.8- 710121 370 0.5- 0.4- 780114 879 0.2+ 0.5+ 940115 887 0.7- 0.3+ 710123 693 0.7+ 0.7+ 780205 801 (0.2+ 2.4-) 940115 372 (2.7+ 1.3-) 710123 693 0.2+ 0.9+ 780302 381 0.4+ 1.0- 940202 897 1.4+ 0.0 710123 370 1.8+ 0.6- 780313 801 (3.1+ 1.0-) 940202 897 1.2+ 1.5- 710125 370 0.0 1.9+ 851019 691 1.0+ 0.1+ 940202 897 0.5+ 1.8- 710126 046 0.7- 1.6+ 851019 691 1.5+ 0.5- 940203 360 0.5+ 1.0- 710126 693 1.9+ 2.0+ 851022 372 0.3+ 1.5- 940203 360 0.8+ 1.0- 710130 046 0.8- 1.8- 851115 691 1.9- 0.2+ 940210 897 1.1+ 0.3+ 710131 046 1.4- 0.5- 851115 691 0.7+ 0.7- 940210 897 0.5- 1.1- 710202 370 (2.6- 1.6+) 851115 691 1.0- 0.6- 940212 675 1.0- 0.6- 710202 370 2.0- 2.1- 851120 691 0.2+ 1.1- 940212 675 0.3+ 0.5- 710203 370 1.8- 0.9+ 851120 691 0.0 0.1- 940215 675 (0.1- 2.2-) 710223 370 (0.3- 3.2+) 851120 691 0.5- 1.2- 940215 675 (0.3- 3.0-) 710227 370 (3.7- 0.0 ) 851218 691 0.8- 0.6- 940310 360 0.4+ 0.1- 710228 693 0.6+ 0.0 851218 691 0.1- 0.4- 940310 360 0.5+ 0.9- 710228 693 0.0 0.1+ 851218 691 0.6- 0.5- 940317 360 0.2+ 0.1- 710303 370 (2.8- 3.2+) 860211 691 0.1+ 0.5- 940317 360 0.1+ 0.1+ 710323 370 (3.1- 1.9+) 860211 691 0.2+ 0.2- 940406 691 1.1- 0.3- 710327 693 0.3+ 0.4- 921021 691 0.1+ 0.5- 940406 691 1.0- 0.1- 710327 693 0.5+ 0.7- 921021 691 0.1+ 0.2- 940406 691 1.2- 0.3- 710401 691 0.2+ 0.9- 921021 691 1.1+ 1.0+ 940413 360 0.1- 1.4- 710401 691 0.2+ 1.0- 921201 691 0.3+ 0.2+ 940413 360 0.5- 1.1- 710421 691 0.7- 0.1+ 921201 691 1.0+ 0.1+ 940505 691 1.7- 0.2+ 710421 691 0.6- 0.0 921201 691 1.4+ 0.8- 940505 691 1.5- 0.2+ 710430 693 (2.6+ 0.7+) 921201 691 0.4- 0.2+ 940505 691 (2.2- 0.1+) 710430 693 (3.0+ 0.3+) 930123 691 0.3+ 0.2+ 940506 360 0.2- 1.5+ 710527 693 1.5+ 0.2- 930123 691 1.2+ 0.1+ 940506 360 0.8+ 0.4- 710527 693 1.6+ 0.2+ 930123 691 2.0+ 1.6- 940614 691 1.1- 0.9+ 710619 693 1.7+ 1.7+ 931209 691 0.4+ 0.7- 940614 691 2.1- 0.5- 710619 693 1.4+ 1.4+ 931209 691 0.8- 0.6- 940614 691 (2.3+ 0.5+) ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 1997 May 4