OAA computing section circular NK 1322 89P/Russell 2
The following improved orbital elements, by S. Nakano, are from 93 observations 1980 to 2002. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.78 arc second. See a previous orbit in NK 694. Epoch = 2002 Mar. 27.0 TT T = 2002 Mar. 22.91089 +/- 0.00034 (m.e.) TT Peri. = 249.21712 +/- 0.00016 Node = 42.48375 +/- 0.00011 (2000.0) Inc. = 12.02782 +/- 0.00002 q = 2.2900697 +/- 0.0000008 AU e = 0.3979118 +/- 0.0000002 a = 3.8035455 +/- 0.0000005 AU n' = 0.13286823 +/- 0.00000003 P = 7.418 +/- 0.0000014 years T = 1980 May 19.01772 TT Epoch = 1980 May 1.0 TT Peri. = 245.18585 e = 0.4167888 Node = 45.18562 (2000.0) a = 3.7010724 AU Inc. = 12.53075 n'= 0.13842442 q = 2.1585070 AU P = 7.120 years T = 1987 July 3.73529 TT Epoch = 1987 June 14.0 TT Peri. = 245.39030 e = 0.4178128 Node = 45.10893 (2000.0) a = 3.6953227 AU Inc. = 12.53405 n'= 0.13874761 q = 2.1513696 AU P = 7.104 years T = 1994 Oct. 27.30643 TT Epoch = 1994 Oct. 15.0 TT Peri. = 249.16947 e = 0.3996783 Node = 42.53742 (2000.0) a = 3.7919965 AU Inc. = 12.04160 n'= 0.13347569 q = 2.2764179 AU P = 7.384 years The predicted orbit for the 2009 return is as follows: T = 2009 Aug. 17.16298 TT Epoch = 2009 Sept. 6.0 TT Peri. = 249.32420 e = 0.3995064 Node = 42.38491 (2000.0) a = 3.7967644 AU Inc. = 12.03146 n'= 0.13322435 q = 2.2799326 AU P = 7.398 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1980/ 940612 691 0.0 0.4+ 020901 644 1.1- 1.6- 800809 413 1.7+ 1.8- 940612 691 0.0 0.7+ 020912 360 0.1+ 0.5- 800928 413 0.5+ 1.8- 940711 360 0.5+ 0.0 020912 360 0.0 0.5- 801002 413 1.4+ 1.1+ 940711 360 0.9+ 0.6+ 020913 699 0.6+ 0.9+ 801003 413 0.5- 0.0 1995/ 020913 699 0.8+ 0.8+ 801006 413 0.9- 0.1- 950826 950 0.1+ 0.0 020913 699 0.2- 1.1+ 801006 323 (2.8+ 1.2+) 950826 950 0.1- 0.0 020913 699 0.6- 1.7+ 801007 323(11.6+ 12.7-) 950826 950 0.2- 0.6+ 020914 608 0.6- 0.6+ 1987/ 950903 691 0.1- 0.7+ 020914 608 0.7- 0.6+ 870701 323 0.3- 1.4+ 950903 691 0.2- 0.3+ 020914 608 0.7- 0.6+ 870702 323 (0.3+ 2.6+) 950903 691 0.1- 0.4+ 020917 644 0.1+ 0.5- 870702 323 0.0 0.9- 2001/ 020917 644 0.6+ 0.1- 870704 413 1.7- 0.0 010426 829 (2.1+ 3.3-) 020917 644 0.2+ 0.0 870706 323 0.2- 1.4+ 010426 829 1.0+ 1.9- 020917 644 0.1- 0.1+ 870718 323 0.8+ 1.1- 010427 829 (2.8+ 3.1-) 020917 644 0.8+ 0.3+ 870724 323 1.8+ 1.1- 010427 829 (1.8+ 2.7-) 020917 644 0.4+ 0.1- 870731 323 (3.7+ 2.2-) 2002/ 020927 704 1.8+ 0.3+ 870818 323 (1.7+ 3.1-) 020814 704 (2.1+ 0.3-) 020927 704 1.0+ 1.1- 870819 474 0.9- 1.1- 020814 704 0.8- 1.9+ 020927 704 0.7+ 0.7+ 870819 474 0.1- 1.2- 020814 704 0.5- 1.0- 021001 608 0.5+ 0.7- 870828 323 (1.1- 3.2-) 020814 704 0.1- 0.2+ 021001 608 0.0 0.8- 1994/ 020814 704 1.3- 0.3+ 021001 608 0.1- 0.6- 940405 691 0.3- 0.0 020815 699 0.1- 0.7+ 021001 204 0.7- 0.4+ 940405 691 0.3- 0.3+ 020815 699 1.8- 0.2- 021001 204 0.0 0.5- 940405 691 0.5- 0.9- 020815 699 1.6- 0.1+ 021006 859 1.0+ 0.9+ 940406 691 0.3+ 0.1+ 020815 699 1.5- 0.4+ 021006 859 1.6- 0.4- 940406 691 1.0+ 0.3+ 020819 360 0.9- 0.1- 021006 859 0.4- 0.7- 940406 691 0.1- 0.0 020819 360 0.7- 0.2- 021009 699 1.9+ 0.4+ 940502 691 0.5- 0.1+ 020819 360 0.5- 0.1+ 021009 699 (2.3+ 1.2+) 940502 691 0.7- 0.0 020820 644 0.3+ 0.0 021009 699 2.0+ 0.5+ 940502 691 0.6- 0.1- 020820 644 0.3+ 0.4- 021009 699 1.1+ 0.9+ 940516 360 0.0 0.7+ 020820 644 0.2+ 0.3- 021011 360 0.9+ 0.5+ 940516 360 0.1- 0.2+ 020830 349 0.4- 0.9+ 021011 360 1.5+ 0.6+ 940516 360 0.7+ 0.8+ 020830 349 0.7- 0.5- 021128 360 0.3- 0.5- 940601 360 0.4+ 0.3+ 020830 349 1.2- 0.3+ 021128 360 0.1- 0.8- 940601 360 0.6+ 0.7+ 020901 644 0.0 0.5- 021128 360 0.5+ 0.2- 940612 691 0.1+ 0.6+ 020901 644 0.4+ 0.7- ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2006 Apr. 10