OAA computing section circular NK 1376 180P/NEAT (2001 K1 = 2006 U3) [Temporary numbered]

The following improved orbital elements, by S. Nakano, are from 81 observations 1955 to 2006. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.69 arc second. See a previous orbit in NK 821 (= HICQ 2006). Epoch = 2008 May 14.0 TT T = 2008 May 26.70744 +/- 0.00359 (m.e.) TT Peri. = 94.91311 +/- 0.00053 Node = 84.75340 +/- 0.00025 (2000.0) Inc. = 16.91328 +/- 0.00012 q = 2.4687032 +/- 0.0000042 AU e = 0.3576344 +/- 0.0000012 a = 3.8431435 +/- 0.0000025 AU n' = 0.13082001 +/- 0.00000013 P = 7.534 +/- 0.0000073 years T = 1954 Dec. 22.75741 TT Epoch = 1954 Dec. 4.0 TT Peri. = 93.05064 e = 0.3458144 Node = 86.31715 (2000.0) a = 3.9198347 AU Inc. = 16.64091 n'= 0.12699963 q = 2.5642994 AU P = 7.761 years ] [ T = 1962 Oct. 3.85403 TT Epoch = 1962 Oct. 23.0 TT Peri. = 93.17247 e = 0.3441735 Node = 86.25782 (2000.0) a = 3.9291641 AU Inc. = 16.62796 n'= 0.12654758 q = 2.5768500 AU P = 7.788 years ] [ T = 1970 July 10.86409 TT Epoch = 1970 June 23.0 TT Peri. = 93.25817 e = 0.3462265 Node = 86.17235 (2000.0) a = 3.9173407 AU Inc. = 16.64397 n'= 0.12712093 q = 2.5610535 AU P = 7.753 years ] [ T = 1978 Mar. 16.57774 TT Epoch = 1978 Apr. 2.0 TT Peri. = 94.75899 e = 0.3564878 Node = 85.03350 (2000.0) a = 3.8494459 AU Inc. = 16.89223 n'= 0.13049887 q = 2.4771653 AU P = 7.553 years ] [ T = 1985 Oct. 12.22398 TT Epoch = 1985 Oct. 22.0 TT Peri. = 95.01650 e = 0.3553759 Node = 84.95585 (2000.0) a = 3.8551864 AU Inc. = 16.88388 n'= 0.13020750 q = 2.4851461 AU P = 7.570 years ] [ T = 1993 Apr. 28.36245 TT Epoch = 1993 May 13.0 TT Peri. = 94.79218 e = 0.3569134 Node = 84.93375 (2000.0) a = 3.8495342 AU Inc. = 16.89035 n'= 0.13049438 q = 2.4755839 AU P = 7.553 years ] T = 2000 Nov. 6.89997 TT Epoch = 2000 Oct. 23.0 TT Peri. = 94.65041 e = 0.3572316 Node = 84.83857 (2000.0) a = 3.8436572 AU Inc. = 16.91252 n'= 0.13079378 q = 2.4705815 AU P = 7.536 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1955/ 010521 163 1.0+ 0.2- 010526 704 0.4+ 0.4+ 550514 675 0.0 0.1+ 010521 046 1.6- 0.1- 010526 704 1.3+ 0.1+ 550514 675 0.4- 0.4+ 010521 046 1.2- 0.2+ 010526 704 0.2+ 1.0+ 550514 675 0.3+ 0.7- 010521 046 0.8- 0.7+ 010526 704 0.2- 0.0 2001/ 010521 046 0.1+ 0.4- 010526 704 1.4+ 0.1+ 010202 699 0.2- 0.5+ 010521 163 1.9+ 0.3- 010526 704 0.5- 1.2- 010202 699 0.7- 1.2+ 010521 557 0.4- 0.1- 010526 704 1.3- 0.3- 010202 699 0.7+ 0.8+ 010521 163 1.8+ 0.0 010528 402 1.1- 0.2+ 010202 699 (3.1- 2.7+) 010521 163 (2.1+ 0.7+) 010528 402 0.5+ 0.0 010415 704 0.0 0.7+ 010521 557 0.5- 0.2+ 010528 402 0.4+ 0.3+ 010415 704 0.4- 0.2+ 010521 163 0.9- 0.1+ 010529 170 (2.0- 1.0-) 010415 704 0.8- 0.1- 010521 557 0.4- 0.3+ 010530 170 (2.4- 0.8-) 010415 704 0.3+ 0.4- 010521 557 0.3- 0.1+ 010611 360 0.1+ 0.4+ 010415 704 0.5- 0.6+ 010521 046 0.4+ 0.6+ 010611 360 0.7+ 0.2+ 010425 699 (3.4- 0.4+) 010521 046 0.1+ 0.8+ 010611 360 0.3- 0.5+ 010425 699 (3.5- 0.1-) 010521 046 0.6- 0.1+ 010614 204 0.1- 0.7+ 010425 699 (3.7- 0.7+) 010521 046 0.4+ 0.1+ 010614 204 0.2+ 0.0 010425 699 (4.4- 0.3+) 010522 704 1.2+ 0.3+ 010621 170 1.7+ 0.3- 010518 699 (3.3- 0.4+) 010522 704 0.5- 1.0- 010621 170 1.8- 0.8+ 010518 699 (2.7- 0.3-) 010522 704 1.0- 0.1+ 010622 118 1.8+ 0.5- 010518 699 (5.4- 1.1+) 010522 704 0.9- 0.5+ 010622 118 0.6+ 0.0 010518 699 (3.9- 0.3+) 010522 704 1.6- 0.5- 010623 504 1.3- 0.4- 010520 608 0.4- 0.2- 010522 608 1.5+ 1.6- 010623 504 0.1+ 0.5+ 010520 608 0.4+ 0.5- 010522 608 0.2- 1.3- 010623 504 1.3+ 0.4+ 010520 608 0.7+ 0.4- 010522 608 0.4- 0.2- 010722 360 0.3- 0.5+ 010521 608 0.1- 0.6- 010522 557 0.8- 0.2- 010722 360 0.7- 0.8+ 010521 422 0.5+ 0.7- 010522 557 0.8- 0.1+ 010722 360 0.3+ 0.2+ 010521 608 0.5- 1.0- 010525 402 0.6+ 0.3- 2006/ 010521 422 0.2+ 0.3- 010525 402 0.0 0.6+ 061023 950 0.2- 0.1- 010521 422 0.4+ 0.7- 010525 402 0.5+ 0.1- 061023 950 0.1+ 0.2- 010521 608 0.6- 1.0- 010526 170 (2.9- 0.5+) 061024 950 0.1+ 0.2- 010521 046 0.4- 0.1+ 010526 170 (3.4- 1.6-) 061024 950 0.3+ 0.1- 010521 046 1.3+ 0.1- 010526 704 0.2+ 0.1+ ( ) -------- Rejected Obs.

Director, Computing Section Syuichi Nakano 2006 Oct. 30

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