OAA computing section circular NK 870 P/2001 R1 (LONEOS)

The following improved orbital elements, by S. Nakano, are from 113 observations 2001 Aug. 19 to 2002 Mar. 11. 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. Epoch = 2002 Feb. 15.0 TT T = 2002 Feb. 17.57095 +/- 0.00080 (m.e.) TT Peri. = 24.73506 +/- 0.00071 Node = 35.48716 +/- 0.00036 (2000.0) Inc. = 7.03963 +/- 0.00004 q = 1.3605253 +/- 0.0000069 AU e = 0.6087590 +/- 0.0000153 a = 3.4774606 +/- 0.0000393 AU n' = 0.15198851 +/- 0.00000258 P = 6.485 +/- 0.0001100 years (+/- 0.04 day) The predicted orbit for the 2008 return is as follows: T = 2008 Aug. 5.18577 TT Epoch = 2008 Aug. 2.0 TT Peri. = 24.96202 e = 0.6116678 Node = 35.30067 (2000.0) a = 3.4635500 AU Inc. = 7.03259 n'= 0.15290507 q = 1.3450078 AU P = 6.446 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2001/ 010918 422 0.4- 0.1- 011121 921 (3.4+ 0.5+) 010819 704 0.4- 0.7- 010919 402 0.5- 1.0- 011202 118 1.0+ 0.4+ 010819 704 0.1- 0.1- 010919 402 0.2- 0.1- 011202 118 0.3+ 0.2+ 010819 704 0.5- 0.7+ 010919 402 0.2+ 0.4+ 011209 921 1.9+ 1.4+ 010819 704 0.0 1.4+ 010924 428 0.4+ 0.1+ 011215 587 1.1- 0.4- 010819 704 1.0- 1.7+ 010924 428 0.2- 0.3- 011215 587 0.7+ 0.1- 010910 699 0.2- 0.1- 010925 704 (2.3- 0.5-) 2002/ 010910 699 1.0+ 1.0+ 010925 704 0.6- 0.8- 020105 360 1.6- 0.4- 010910 699 1.0+ 1.4+ 010925 704 0.2- 0.6- 020105 360 1.2- 0.3- 010910 699 0.5+ 0.2- 010925 704 0.3- 1.0- 020105 215 0.1- 0.5- 010911 918 0.6+ 0.5- 010925 704 1.1- 1.9- 020105 215 0.4- 0.1- 010911 918 0.4+ 0.0 011008 170 1.5+ 1.4+ 020105 215 1.2+ 0.7- 010911 918 0.5+ 0.9- 011008 170 0.8+ 0.4+ 020112 349 0.6+ 1.0- 010911 918 1.5+ 0.2- 011014 699 0.9+ 0.9+ 020112 349 1.3+ 0.2+ 010911 704 0.6- 0.1- 011014 699 (4.2+ 2.1+) 020114 921 (4.8- 3.4+) 010911 649 0.6- 1.1- 011014 699 (2.1+ 2.3+) 020114 921 (2.6- 0.6-) 010911 704 0.3- 0.1+ 011014 699 (3.0+ 1.5+) 020114 921 0.2+ 0.6+ 010911 649 0.5- 0.9- 011015 608 0.4- 1.1- 020114 921 (0.2+ 2.0+) 010911 704 0.2- 0.4+ 011015 608 1.0+ 0.2+ 020201 360 0.7- 0.7- 010911 649 0.4- 1.1- 011015 608 1.6+ 0.5+ 020201 360 1.1- 0.7- 010911 704 0.4- 0.3- 011020 704 (2.3+ 1.4+) 020203 113 0.4- 0.6- 010911 704 0.2+ 0.1+ 011020 704 0.8+ 1.4+ 020203 113 0.7+ 0.0 010911 474 0.3+ 0.2- 011020 704 1.5+ 1.0+ 020203 113 0.5+ 0.2+ 010911 474 0.0 0.6- 011020 704 (2.1+ 1.8+) 020203 113 0.2+ 0.1+ 010911 474 0.3- 0.2- 011023 704 0.2+ 1.4+ 020203 113 0.6+ 0.0 010911 474 0.2- 0.3- 011023 704 0.4+ 0.9+ 020206 402 0.3+ 0.5- 010914 941 (2.1- 0.4-) 011023 696 1.0- 0.4- 020206 402 1.8+ 0.7- 010914 941 (2.2- 0.1+) 011023 696 1.4- 0.1- 020206 402 0.0 0.6- 010914 941 0.2- 0.3+ 011023 704 0.7- 1.6+ 020209 340 0.4- 0.8+ 010914 941 0.1+ 0.4+ 011023 704 1.2- 1.0+ 020209 340 0.2- 0.2+ 010915 170 0.0 1.7- 011104 844 0.6- 1.3- 020210 349 1.0+ 0.1+ 010915 170 1.0+ 0.3+ 011104 844 0.1- 1.7- 020210 349 1.0+ 1.1+ 010915 170 (2.1+ 1.3+) 011104 844 1.3- 0.8+ 020210 349 1.7+ 1.2+ 010916 372 1.9+ 1.3+ 011106 704 0.4- 0.2- 020211 921 (4.2- 4.3-) 010916 372 (2.3+ 1.7+) 011106 704 0.2+ 0.7+ 020211 921 0.3+ 0.3+ 010916 360 0.3- 0.2- 011106 704 0.1- 0.3+ 020215 360 0.8- 0.6- 010916 372 1.5+ 1.0+ 011110 300 0.5+ 0.2+ 020215 360 1.4- 0.6- 010916 360 0.2- 0.4- 011110 300 (2.8+ 1.3+) 020220 340 0.6- 0.2+ 010917 428 0.2+ 0.4- 011118 608 0.8- 0.1+ 020220 340 1.2- 1.5- 010917 428 0.4+ 0.2- 011118 608 1.1- 0.5- 020309 360 0.2+ 0.3+ 010917 402 0.9- 1.2- 011118 608 1.0- 0.2- 020309 360 0.3- 0.0 010917 402 1.7- 0.8+ 011119 349 1.2- 1.2+ 020311 215 1.0- 0.5+ 010918 422 0.3- 0.8- 011119 349 0.8- 0.5+ 020311 215 0.6+ 0.4+ 010918 422 0.1+ 0.6- 011121 921 (3.5+ 2.6+) 020311 215 0.4+ 0.2+ ( ) -------- Rejected Obs.

Director, Computing Section Syuichi Nakano 2002 Oct. 29

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