OAA computing section circular NK 1673 201P/2001 R1 = 2008 Q4 (LONEOS)
The following improved orbital elements, by S. Nakano, are from 130 observations 2001 to 2008. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.79 arc second. See orbits on MPC 43759, MPC 44183 (= HICQ 2002) and NK 870. Epoch = 2008 Aug. 2.0 TT T = 2008 Aug. 4.75852 +/- 0.00043 (m.e.) TT Peri. = 24.96265 +/- 0.00031 Node = 35.30168 +/- 0.00028 (2000.0) Inc. = 7.03254 +/- 0.00002 q = 1.3450220 +/- 0.0000024 AU e = 0.6116195 +/- 0.0000007 a = 3.4631550 +/- 0.0000026 AU n' = 0.15293123 +/- 0.00000018 P = 6.445 +/- 0.0000074 years T = 2002 Feb. 17.57303 TT Epoch = 2002 Feb. 15.0 TT Peri. = 24.73676 e = 0.6087154 Node = 35.48756 (2000.0) a = 3.4770325 AU Inc. = 7.03954 n'= 0.15201658 q = 1.3605093 AU P = 6.484 years The predicted orbit for the 2015 return is as follows: T = 2015 Jan. 14.61342 TT Epoch = 2015 Jan. 18.0 TT Peri. = 25.05951 e = 0.6127706 Node = 35.23810 (2000.0) a = 3.4584030 AU Inc. = 7.03334 n'= 0.15324654 q = 1.3391955 AU P = 6.432 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2001/ 010919 402 0.0 0.1+ 020105 360 1.4- 0.5- 010809 644 0.4- 0.8- 010919 402 0.4+ 0.5+ 020105 215 0.3- 0.6- 010814 644 0.4- 0.9- 010924 428 0.7+ 0.3+ 020105 215 0.6- 0.2- 010814 644 0.4- 1.2- 010924 428 0.1+ 0.2- 020105 215 1.0+ 0.9- 010814 644 1.0- 1.3- 010925 704 (2.0- 0.4-) 020112 349 0.4+ 1.1- 010819 704 1.0- 0.7- 010925 704 0.3- 0.7- 020112 349 1.1+ 0.1+ 010819 704 0.6- 0.1- 010925 704 0.1+ 0.5- 020114 921 (5.0- 3.3+) 010819 704 1.1- 0.7+ 010925 704 0.0 0.9- 020114 921 (2.8- 0.7-) 010819 704 0.6- 1.4+ 010925 704 0.8- 1.7- 020114 921 0.0 0.5+ 010819 704 1.6- 1.7+ 011008 170 1.8+ 1.5+ 020114 921 0.0 1.9+ 010910 699 0.2- 0.0 011008 170 1.1+ 0.4+ 020201 360 0.8- 0.7- 010910 699 1.0+ 1.1+ 011014 699 1.2+ 0.9+ 020201 360 1.1- 0.7- 010910 699 1.1+ 1.6+ 011014 699 (4.5+ 2.1+) 020203 113 0.5- 0.6- 010910 699 0.6+ 0.0 011014 699 (2.4+ 2.3+) 020203 113 0.6+ 0.1+ 010911 918 0.6+ 0.3- 011014 699 (3.3+ 1.5+) 020203 113 0.4+ 0.3+ 010911 918 0.5+ 0.2+ 011015 608 0.1- 1.1- 020203 113 0.2+ 0.2+ 010911 918 0.6+ 0.7- 011015 608 1.3+ 0.2+ 020203 113 0.6+ 0.1+ 010911 918 1.6+ 0.0 011015 608 1.9+ 0.5+ 020206 402 0.3+ 0.4- 010911 704 0.5- 0.1+ 011020 704 (2.5+ 1.4+) 020206 402 1.8+ 0.6- 010911 649 0.6- 1.0- 011020 704 1.1+ 1.4+ 020206 402 0.0 0.5- 010911 704 0.2- 0.3+ 011020 704 1.8+ 0.9+ 020209 340 0.4- 0.8+ 010911 649 0.4- 0.7- 011020 704 (2.3+ 1.7+) 020209 340 0.2- 0.3+ 010911 704 0.1- 0.5+ 011023 704 0.4+ 1.3+ 020210 349 1.0+ 0.2+ 010911 649 0.3- 1.0- 011023 704 0.6+ 0.9+ 020210 349 1.0+ 1.2+ 010911 704 0.4- 0.2- 011023 696 0.8- 0.5- 020210 349 1.7+ 1.2+ 010911 704 0.3+ 0.3+ 011023 696 1.2- 0.2- 020211 921 (4.2- 4.2-) 010911 474 0.4+ 0.1- 011023 704 0.5- 1.6+ 020211 921 0.3+ 0.3+ 010911 474 0.1+ 0.4- 011023 704 1.0- 1.0+ 020215 360 0.8- 0.5- 010911 474 0.2- 0.0 011104 844 0.5- 1.4- 020215 360 1.3- 0.5- 010911 474 0.1- 0.1- 011104 844 0.0 1.8- 020220 340 0.6- 0.3+ 010914 941 1.9- 0.2- 011104 844 1.2- 0.7+ 020220 340 1.1- 1.4- 010914 941 (2.1- 0.2+) 011106 704 0.3- 0.4- 020309 360 0.2+ 0.5+ 010914 941 0.1- 0.4+ 011106 704 0.3+ 0.6+ 020309 360 0.3- 0.2+ 010914 941 0.3+ 0.6+ 011106 704 0.0 0.1+ 020311 215 1.0- 0.6+ 010915 170 0.2+ 1.5- 011110 300 0.6+ 0.0 020311 215 0.6+ 0.5+ 010915 170 1.2+ 0.5+ 011110 300 (2.8+ 1.1+) 020311 215 0.4+ 0.3+ 010915 170 (2.3+ 1.5+) 011118 608 0.9- 0.1- 2008/ 010916 372 (2.1+ 1.5+) 011118 608 1.2- 0.7- 080831 A71 1.5- 0.0 010916 372 (2.5+ 1.9+) 011118 608 1.0- 0.4- 080901 B40 0.9- 0.2+ 010916 360 0.1- 0.0 011119 349 1.3- 1.0+ 080901 B40 0.3- 0.1- 010916 372 1.7+ 1.1+ 011119 349 0.9- 0.3+ 080901 B40 0.1+ 0.9- 010916 360 0.0 0.2- 011121 921 (3.4+ 2.4+) 080901 B40 0.8+ 0.9- 010917 428 0.4+ 0.3- 011121 921 (3.3+ 0.3+) 080901 B40 0.1+ 0.1+ 010917 428 0.7+ 0.0 011202 118 0.8+ 0.2+ 080901 B40 0.3- 0.1- 010917 402 0.7- 1.0- 011202 118 0.1+ 0.1- 080901 B40 0.0 0.0 010917 402 1.5- 0.9+ 011209 921 1.7+ 1.2+ 080901 B40 0.3- 0.2- 010918 422 0.1- 0.6- 011215 587 1.3- 0.6- 080902 349 0.9+ 0.3- 010918 422 0.4+ 0.5- 011215 587 0.4+ 0.3- 080902 349 0.7+ 0.0 010918 422 0.2- 0.0 2002/ 080902 349 0.4+ 0.2+ 010919 402 0.2- 0.9- 020105 360 1.8- 0.5- ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2008 Sept. 6