OAA computing section circular NK 1295 71P/Clark
The following improved orbital elements, by S. Nakano, are from 241 observations 1994 to 2005, 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. See previous orbits in NK 661 and NK 933 (= HICQ 2006). Delta-T correction for NK 933 is -0.41 day. The reason why delta-T was some large correction depends upon that near aphelion observations made in 1996-1997 were included in orbital improvement with heavy weights. Epoch = 2006 May 25.0 TT T = 2006 June 6.76756 +/- 0.00081 (m.e.) TT Peri. = 208.73835 +/- 0.00034 Node = 59.65548 +/- 0.00016 (2000.0) Inc. = 9.48850 +/- 0.00004 q = 1.5620768 +/- 0.0000007 AU e = 0.4997580 +/- 0.0000003 a = 3.1226424 +/- 0.0000007 AU n' = 0.17861614 +/- 0.00000006 P = 5.518 +/- 0.0000018 years A1 = +2.251 +/- 0.031 A2 = -0.31257 +/- 0.00138 A3 = -0.23827 +/- 0.01554 T = 1995 May 31.09694 TT Epoch = 1995 June 12.0 TT Peri. = 208.84867 e = 0.5019593 Node = 59.72343 (2000.0) a = 3.1173534 AU Inc. = 9.50488 n'= 0.17907090 q = 1.5525689 AU P = 5.504 years T = 2000 Dec. 1.99815 TT Epoch = 2000 Dec. 2.0 TT Peri. = 208.83593 e = 0.5005166 Node = 59.69383 (2000.0) a = 3.1215041 AU Inc. = 9.49545 n'= 0.17871385 q = 1.5591394 AU P = 5.515 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1994/ 950526 367 0.0 0.5- 961215 691 (8.3+ 6.6+) 941205 372 0.5+ 1.5+ Y 950526 372 0.4+ 0.6- 961215 691 (7.6+ 6.0+) 941205 360 0.7+ 1.1+ 950527 410 0.5+ 0.6+ 1997/ 941205 360 0.1- 1.3+ 950527 410 0.3+ 1.0+ 971229 568(13.6+ 5.2+) 941205 360 0.9+ 0.9+ 950527 410 0.7+ 0.2+ 971230 568(13.2+ 4.5+) 941206 360 2.0- 1.5+ 950527 402 0.5+ 0.3+ 2000/ 941206 360 1.5- 1.5+ 950527 402 0.0 0.0 000204 557 1.6- 0.1+ 941229 887 (0.1- 2.5+) 950527 372 0.6- 1.0- 000204 557 0.6- 0.9+ 941229 887 0.7- 2.0+ 950531 402 0.7- 0.2+ 000204 557 1.0- 0.5+ 1995/ 950531 402 0.8- 0.1+ 000204 557 1.7- 0.5- 950101 385 0.9+ 0.5+ 950601 897 0.8- 0.3- 000210 691 1.1- 0.4- 950101 385 1.4+ 0.8+ 950601 897 1.5- 0.4- 000210 691 0.1+ 1.3- 950101 385 (2.5+ 0.8+) 950601 360 1.0- 0.4- 000211 691 1.5- 0.9- 950106 372 1.7- 1.5+ Y 950601 360 0.9- 0.7- 000211 691 1.3- 1.0- 950106 372 0.9- 2.0+ Y 950601 402 0.7- 0.4+ 000211 691 0.8- 1.1- 950110 887 0.4- 0.4+ 950601 402 0.4- 0.1+ 000302 360 0.2- 0.7- 950110 887 0.3- 1.1+ 950601 372 0.8- 1.6- 000302 360 0.6- 0.9- 950110 887 0.5- 1.5+ 950605 360 1.3- 0.9- 000303 561 0.5- 1.1- 950113 897 1.0- 1.5+ 950605 360 1.5- 0.7- 000303 561 0.4- 0.4- 950113 897 0.1+ 0.6+ 950605 372 0.2- 0.8- 000303 561 0.8- 0.3- 950113 897 0.6- 1.5+ 950621 372 1.7- 0.3+ 000304 704 0.4- 0.4- 950113 372 (0.4- 2.5+)Y 950624 367 0.2- 0.3- 000304 704 0.3- 1.2- 950113 372 0.3+ 1.8+ Y 950624 367 0.0 1.1- 000304 704 1.0- 1.3- 950126 897 0.3- 1.8+ 950624 367 0.1+ 1.5- 000304 704 0.1- 1.0- 950126 897 0.5- 0.1- 950629 372 1.2- 0.3+ 000304 704 0.1+ 0.7- 950126 897 0.4+ 0.7+ 950708 372 0.7- 1.1+ 000312 704 0.4- 0.7- 950126 385 0.6- 0.6+ 950709 372 0.8- 1.5+ 000312 704 0.0 0.9- 950126 385 0.2- 1.2+ 950709 360 0.3- 0.6- 000312 704 0.0 0.9- 950128 691 0.2- 0.4+ 950709 360 0.4- 0.7- 000312 704 0.4+ 0.7- 950128 691 0.2+ 0.0 950714 897 0.2- 0.2+ 000312 704 0.0 0.4- 950128 691 0.1+ 0.3+ 950714 897 0.2- 1.5- 000314 402 0.3- 1.6- 950129 691 1.1- 1.3+ 950714 897 0.4- 0.9- 000314 402 0.5- 1.3- 950129 691 0.3+ 1.3+ 950723 897 1.5+ 0.3+ 000314 402 0.5- 1.5- 950129 691 (0.0 2.3+) 950723 897 0.4- 1.3+ 000328 704 0.5+ 0.6- 950210 360 0.0 0.8+ 950725 372 1.5- 1.0+ 000328 704 0.9+ 0.7- 950210 360 0.3- 0.9+ 950727 360 0.8- 0.5- 000328 704 1.1+ 0.8- 950219 897 0.0 0.7+ 950727 360 0.8- 0.5- 000330 360 0.9+ 1.4- 950219 897 0.8+ 0.8+ 950731 360 0.5- 0.6- 000330 360 0.9+ 1.3- 950226 897 0.7- 0.1+ 950731 360 0.7- 0.4- 000424 360 1.0+ 1.0- 950226 897 0.6- 0.5- 950731 372 0.9- 1.9+ 000424 360 1.1+ 0.8- 950306 359 1.2- 0.2+ 950802 323 0.4- 0.3- 000424 867 0.9+ 0.9- 950306 359 0.8- 0.0 950814 897 1.1- 0.2- 000424 867 1.1+ 0.7- 950306 359 0.4- 0.5- 950814 897 0.2+ 0.8- 000501 699 1.7+ 1.2- 950308 422 1.6- 0.3- 950815 323 0.6- 0.7- 000501 699 1.5+ 0.8- 950308 360 0.4+ 0.3- 950816 360 0.6- 0.6- 000501 699 2.1+ 0.9- 950308 360 0.0 0.3- 950816 360 0.6- 0.6- 000501 699 (2.3+ 1.3-) 950308 360 0.0 0.2- 950818 360 0.1- 0.9- 000520 504 0.0 1.5+ 950308 897 0.5- 0.6+ 950818 360 0.2- 0.9- 000520 504 0.1- 1.6+ 950308 897 0.3- 0.3- 950822 900 0.2+ 0.9- 000520 504 0.3- 0.4- 950311 422 1.2+ 0.3+ 950827 323 (1.0+ 4.6+) 000520 504 0.6- 0.2+ 950311 422 0.7+ 0.2+ 950911 834 (2.5- 0.8-) 000529 360 0.9- 1.1+ 950328 801 1.5- 0.1- 950917 897 0.3- 0.4- 000529 360 1.1- 0.9+ 950328 801 2.0+ 0.1+ 950917 897 1.5+ 1.3- 2001/ 950403 801 0.9+ 0.1+ 950920 691 0.3- 0.2- 010828 360 0.5+ 2.2- 950403 801 0.6+ 0.4- 950920 691 0.1+ 0.2- 010828 360 (0.1- 2.4-) 950403 897 0.2+ 0.1- 950920 691 0.1- 0.3- 010828 360 0.2+ 2.2- 950403 897 1.5+ 0.7- 950921 897 0.1- 0.8+ 010831 402 0.3+ 2.1- 950403 897 0.4- 0.6- 951013 360 0.7+ 0.2+ 010831 402 (0.1- 2.6-) 950403 323 0.7+ 0.6- 951013 360 0.6+ 0.3+ 010926 683 0.3- 0.4- 950407 410 0.5- 0.3+ 951014 410 0.7- 0.6- 010926 683 (0.5+ 4.4-) 950407 410 0.7+ 0.5+ 951014 410 0.7+ 0.3- 010926 683 (1.3- 4.2-) 950407 410 1.1+ 0.5+ 951014 410 0.2- 1.9- 011010 644 0.3- 0.1- 950407 897 1.3+ 0.5- 951020 360 1.2+ 0.6+ 011010 644 0.6- 0.3- 950407 897 0.3+ 1.4- 951020 360 1.6+ 0.1+ 011010 644 0.6- 0.4- 950426 360 1.3+ 0.4+ 951020 410 (2.5+ 1.4-) 011014 360 0.4- 1.3- 950426 360 1.4+ 0.4+ 951020 410 (2.4+ 0.1-) 011014 360 0.4- 0.7- 950502 801 1.3+ 0.2- 951020 410 1.7+ 0.6+ 2005/ 950502 801 1.4+ 0.0 951025 691 0.0 0.7+ 051222 568 1.0+ 0.6- 950503 323 0.2+ 0.3- 951025 691 0.0 0.3+ 051222 568 0.0 0.3+ 950504 801 1.4+ 0.1- 951025 360 1.6+ 0.1+ 051222 568 0.3+ 0.4- 950504 801 1.7+ 1.2- 951025 360 1.9+ 0.7+ 051222 568 2.1+ 0.4- 950505 360 1.9+ 0.3- 951025 897 (3.9+ 0.4-) 051222 568 1.3+ 0.4- 950505 360 1.7+ 0.3- 951027 693 0.2- 0.7+ 051222 568 2.2+ 0.7- 950505 360 1.3+ 0.2- 951027 693 0.5+ 0.1- 051222 568 1.5+ 0.6- 950508 360 1.3+ 0.7- 951027 693 0.4- 1.2+ 051224 349 0.3+ 0.1- 950508 360 1.2+ 0.8- 951116 360 1.4+ 0.4+ 051224 349 0.4+ 0.3+ 950517 897 0.9+ 0.5+ 951116 360 1.5+ 0.7+ 051224 349 0.9+ 0.4- 950517 897 0.1+ 0.5+ 951117 691 0.4+ 0.7+ 051227 349 0.4+ 0.7- 950517 897 0.9+ 0.3- 951117 691 0.2+ 0.6+ 051227 349 0.9+ 0.7- 950522 359 0.1+ 1.7+ 951117 691 0.3+ 0.6+ 051227 349 0.6+ 1.1- 950522 897 1.3+ 0.6+ 951117 801 (0.6- 2.8-) 051228 703 1.9- 1.4+ 950522 359 1.3+ 0.0 951117 801 (4.6+ 0.7-) 051228 703 0.0 1.1+ 950522 897 1.1+ 0.5+ 951210 360 0.3+ 0.4+ 051228 703 1.6- 1.2+ 950522 359 (1.1+ 4.3-) 951210 360 1.0+ 0.2+ 051228 703 1.4- 0.4+ 950522 372 0.5+ 0.3- 951231 691 1.8+ 1.0+ 051229 H06 0.5- 0.3+ 950523 372 0.3+ 0.1- 951231 691 2.1+ 0.9+ 051229 H06 0.8- 0.2+ 950523 360 0.9+ 0.3- 951231 691 1.4+ 0.8+ 051229 H06 1.1- 0.3+ 950523 372 0.6+ 0.5+ 1996/ 051230 H06 0.5- 0.7+ 950523 360 0.9+ 0.3- 961118 691(11.0+ 6.5+) 051230 H06 0.5- 0.1- 950526 367 0.1- 0.2- 961118 691(10.0+ 6.4+) 051230 H06 1.6- 1.3+ 950526 367 0.1+ 0.2- 961215 691 (8.6+ 6.9+) ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2006 Jan. 1