OAA computing section circular NK 995 158P/Kowal-LINEAR (1979 O1 = LINEAR)
The following improved orbital elements, by S. Nakano, are from 80 observations 1979 to 2003. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.70 arc second. The identi- fication with Comet C/1979 O1 is found by S. Nakano. Epoch = 2002 July 25.0 TT T = 2002 July 25.64349 +/- 0.02632 (m.e.) TT Peri. = 235.57538 +/- 0.00267 Node = 137.31347 +/- 0.00023 (2000.0) Inc. = 7.90314 +/- 0.00002 q = 4.5949859 +/- 0.0000015 AU e = 0.0288711 +/- 0.0000004 a = 4.7315921 +/- 0.0000005 AU n' = 0.09576198 +/- 0.00000002 P = 10.292 +/- 0.0000018 years T = 1981 Sept.14.49633 TT Epoch = 1981 Oct. 3.0 TT Peri. = 232.65951 e = 0.0283258 Node = 137.47836 (2000.0) a = 4.7728353 AU Inc. = 7.88299 n'= 0.09452342 q = 4.6376411 AU P = 10.427 years T = 1992 Feb. 29.98127 TT Epoch = 1992 Feb. 28.0 TT Peri. = 233.85826 e = 0.0280905 Node = 137.36334 (2000.0) a = 4.7629217 AU Inc. = 7.89048 n'= 0.09481868 q = 4.6291288 AU P = 10.395 years The predicted orbit for the 2012 return is as follows: T = 2012 Sept.27.43820 TT Epoch = 2012 Sept.30.0 TT Peri. = 232.84505 e = 0.0306966 Node = 137.30452 (2000.0) a = 4.7213513 AU Inc. = 7.90731 n'= 0.09607372 q = 4.5764220 AU P = 10.259 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1979/ 2002/ 030128 704 1.7+ 1.0+ 790724 675 1.5- 0.2+ 020909 608 0.2- 0.1- 030128 704 (2.6+ 0.7+) 790725 675 (7.3- 0.2+) 020916 608 0.7- 0.4- 031119 699 1.0- 1.4- 790725 675 1.3+ 0.6+ 020921 608 1.3- 1.0- 031119 699 0.7+ 0.2+ 790727 675 (0.5- 5.4-) 020930 704 0.5- 0.0 031119 699 1.1- 0.4- 1990/ 020930 704 0.3+ 0.4- 031119 699 0.3+ 0.5+ 900923 260 0.4+ 0.1- 020930 704 0.2+ 0.2+ 031119 703 1.8- 0.6+ 1993/ 021006 608 0.4- 0.1+ 031119 703 0.7- 0.5+ 931109 261 0.2- 0.0 021006 608 0.4+ 0.2- 031119 703 0.2+ 0.5+ 931109 261 0.1+ 0.0 021006 608 0.2- 0.8- 031119 703 0.4- 0.8+ 2001/ 021030 704 1.9- 1.0+ 031124 699 0.5- 0.5- 010825 704 0.5- 0.4- 021030 704 0.8+ 0.1+ 031124 699 0.1- 0.0 010825 704 0.1+ 0.3+ 021030 704 0.9- 0.1+ 031124 699 0.4+ 0.9+ 010825 704 0.1- 1.1- 021030 704 0.4+ 0.4- 031124 699 0.4+ 0.5+ 010825 704 0.2+ 0.6+ 021030 704 0.4+ 1.1- 031126 691 0.6- 0.1+ 010825 704 0.3- 0.6+ 021106 644 0.6- 0.2+ 031126 691 0.3+ 0.0 010912 704 0.1- 0.5+ 021107 704 0.2+ 0.7- 031126 691 0.4+ 0.0 010912 704 0.4+ 0.7+ 021107 704 0.5- 0.4- 031128 291 0.0 0.1+ 010912 704 1.4+ 0.0 021107 704 1.4- 0.2+ 031128 291 0.0 0.0 010912 704 1.4+ 0.1- 021111 704 0.9+ 0.2+ 031128 291 0.5+ 0.1+ 010919 704 1.0- 0.0 021111 704 0.8- 0.6- 031129 291 0.2+ 0.1- 010919 704 0.0 0.6+ 021111 704 1.1+ 0.0 031129 291 0.3- 0.0 010919 704 0.7+ 0.3- 021111 704 0.4+ 0.0 031129 291 0.6+ 0.1- 010919 704 0.4+ 0.8+ 021121 644 0.4+ 0.4+ 031130 704 0.4+ 0.3- 010919 704 1.8- 0.3+ 021121 644 0.9+ 1.1+ 031130 704 0.9+ 0.1- 010919 704 0.1- 1.5- 021121 644 0.6+ 0.1- 031130 704 1.0- 0.6- 010919 704 1.3- 0.6- 2003/ 031130 704 0.4+ 0.6- 010919 704 1.0- 0.1- 030128 704 0.4+ 0.0 031201 360 0.9+ 0.0 010924 644 0.9+ 0.1- 030128 704 0.5- 0.3- 031201 360 0.7+ 0.3+ 011120 608 0.9+ 0.1+ 030128 704 1.9+ 1.9+ ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2003 Dec. 3