OAA computing section circular NK 1307 68P/Klemola
The following improved orbital elements, by S. Nakano, are from 229 observations 1965 to 1998, including planetary perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas, Vesta, and non-gravitational effect of style II. The mean residual is +/- 0.98 arc second. See previous orbit in NK 623. Epoch = 1998 Apr. 17.0 TT T = 1998 May 1.66538 +/- 0.00052 (m.e.) TT Peri. = 154.54343 +/- 0.00015 Node = 175.54318 +/- 0.00006 (2000.0) Inc. = 11.08870 +/- 0.00003 q = 1.7545172 +/- 0.0000007 AU e = 0.6413179 +/- 0.0000002 a = 4.8915654 +/- 0.0000006 AU n' = 0.09110292 +/- 0.00000002 P = 10.819 +/- 0.0000020 years A1 = -0.025 +/- 0.022 A2 = -0.00166 +/- 0.00016 T = 1965 Aug. 18.36075 TT Epoch = 1965 Aug. 28.0 TT Peri. = 148.03640 e = 0.6422156 Node = 182.69604 (2000.0) a = 4.9287115 AU Inc. = 10.60037 n'= 0.09007494 q = 1.7634160 AU P = 10.942 years T = 1976 Aug. 10.19180 TT Epoch = 1976 Aug. 10.0 TT Peri. = 148.87666 e = 0.6417139 Node = 182.27415 (2000.0) a = 4.9278949 AU Inc. = 10.63374 n'= 0.09009733 q = 1.7655963 AU P = 10.939 years T = 1987 July 22.63321 TT Epoch = 1987 July 24.0 TT Peri. = 154.54286 e = 0.6404516 Node = 176.48406 (2000.0) a = 4.9305559 AU Inc. = 10.94981 n'= 0.09002440 q = 1.7727734 AU P = 10.948 years The predicted orbit for the 2009 return is as follows: T = 2009 Jan. 20.97455 TT Epoch = 2009 Jan. 9.0 TT Peri. = 153.97905 e = 0.6406280 Node = 175.32985 (2000.0) a = 4.8947302 AU Inc. = 11.14414 n'= 0.09101457 q = 1.7590290 AU P = 10.829 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1965/ 870629 293 (5.0- 7.9-) 871109 323 2.4+ 1.6+ 651101 808 0.6- 1.0+ 870630 657 2.2+ 1.6- 871117 801 0.6- 0.4+ 651102 808 0.5+ 2.4+ 870721 657 (1.4+ 2.7+) 871118 323 (1.4+ 2.7+) 651118 074 (0.8+ 2.8-) 870721 046 1.3- 0.1- 1988/ 651118 074 0.6- 0.4+ 870721 046 1.4- 0.2- 881210 568 0.9- 0.5- 651118 074 0.0 0.9- 870722 046 0.9- 0.8- 881210 568 1.2- 0.8- 651123 074 1.7+ 0.3+ 870724 897 1.5+ 0.3- 881210 568 0.7- 1.0- 651127 808 1.1- 1.9+ Y 870724 897 1.1- 0.2+ 881210 568 0.6- 1.4- 651213 822 0.5- 1.8- 870727 026 0.0 0.2+ 1997/ 1976/ 870727 801 1.4- 0.8- 970329 696 0.3- 0.8+ 760808 511 (0.4- 4.0+)Y 870728 657 0.1- 0.6- 970329 696 0.1+ 1.1+ 760810 662 0.5+ 1.0+ 870730 801 0.7+ 0.7+ 970329 696 0.2+ 1.6- 760810 662 0.0 0.9+ 870802 657 0.8- 1.4- 970411 867 0.3+ 0.6- 760818 380 (3.1- 0.6+) 870803 657 (0.2- 2.7-) 970411 867 0.1+ 0.4+ 760819 380 0.7+ 0.6+ 870806 657 (0.4+ 3.7-) 970503 696 0.7- 0.5- 760819 380 0.5+ 1.0+ 870807 657 1.8+ 1.1- 970503 696 0.6- 0.3- 760819 993 (1.7+ 2.6+) 870817 657 1.8+ 0.9+ 970503 696 0.9- 0.4- 760820 372 0.9+ 0.7+ 870817 691 1.0+ 0.7+ 970510 691 0.1- 0.6+ 760820 372 1.0+ 1.2+ 870817 691 1.3+ 0.5+ 970510 691 0.1- 0.3+ 760821 380 0.0 0.5- 870817 691 1.1+ 0.7+ 970510 691 0.2- 0.1+ 760823 885 1.5- 0.5+ 870817 046 1.4- 1.4- 970515 696 0.0 0.1- 760823 885 (2.6- 1.7+) 870817 046 2.0- 0.8+ 970515 696 0.1- 0.1- 760823 885 0.6+ 0.2+ 870818 657 0.0 1.8- 970515 696 0.2- 0.2- 760824 046 1.1- 0.5+ 870818 400 (1.3- 2.7+) 970614 691 0.3- 0.9- 760824 046 0.1+ 1.3+ 870818 400 0.9+ 1.9+ 970614 691 0.1+ 0.0 760825 801 0.2- 0.2+ 870819 657 0.7+ 2.3- 970614 691 0.2+ 0.1+ 760825 046 0.6- 1.2- 870820 046 1.0+ 1.6+ 970731 691 0.3+ 0.3- 760825 046 (2.6+ 2.6-) 870820 046 0.5+ 1.2+ 970731 691 0.5+ 0.1- 760826 801 1.1- 0.4+ 870821 657 1.2- 0.4+ 970731 691 0.5+ 0.1- 760826 046 0.1- 0.3+ 870821 801 0.5+ 2.4+ 1998/ 760826 046 0.7+ 0.4+ 870821 046 0.4+ 0.8- 980703 360 0.9+ 0.1+ 760828 993 0.2- 0.4- 870822 046 0.1+ 1.6- 980703 360 0.8+ 0.1- 760828 390 1.7- 0.3+ 870822 056 0.7- 1.4- 980728 355 1.5- 1.1+ 760828 046 0.2+ 1.0- 870822 056 0.2- 1.8- 980728 355 1.4- 0.4- 760828 046 0.0 2.2- 870822 046 0.1- 0.6- 980728 355 1.5- 1.2+ 760830 808 0.6+ 0.6+ 870823 046 0.4- 1.1+ 980805 360 0.5- 0.1- 760830 808 0.3+ 1.1+ 870823 056 (2.7- 0.1-) 980805 360 0.5+ 0.1- 760913 046 1.5- 2.1- 870823 056 (5.8- 1.4-) 980806 046 0.0 0.5+ 760914 885 1.6+ 0.3+ 870824 056 0.2+ 0.6- 980806 046 0.0 0.1- 760914 885 1.8+ 0.7- 870825 056 0.5- 0.0 980806 046 1.0+ 0.0 760915 885 0.0 0.7- 870825 657 0.4- 1.7- 980806 046 0.0 1.0+ 760915 885 1.2+ 0.1+ 870826 491 0.7+ 0.6- 980807 118 0.9- 0.7- 760915 323 0.2- 0.9- 870826 897 0.8+ 1.4- 980807 118 0.6- 0.0 760916 882 0.7- 1.3+ 870826 897 2.2- 2.4+ 980809 118 0.1+ 0.0 760917 808 0.3+ 0.4+ 870828 323 (2.9+ 1.4+) 980809 118 0.4- 0.2- 760917 808 1.1+ 0.9+ 870831 056 0.1+ 1.2- 980811 046 0.9- 0.7+ 760917 885 0.1+ 1.6- 870831 056 0.0 0.8- 980811 046 0.4- 0.2+ 760917 882 0.6- 0.6- 870831 657 1.5- 1.2- 980811 046 0.5- 0.1+ 760919 691 0.0 1.0+ 870901 657 1.0- 1.7- 980822 402 0.6- 0.4- 760919 691 0.0 1.1+ 870901 046 1.6- 0.8- 980822 402 0.2- 0.1+ 760920 046 0.9+ 1.6- 870902 046 0.3- 1.3+ 980822 402 0.4- 0.1+ 760922 993 (2.9+ 3.3+) 870902 056 0.9+ 2.3- 980825 360 0.5- 0.5- 760923 801 1.1- 0.6+ 870902 400 1.0+ 1.3+ 980825 360 0.4- 0.4- 760923 046 0.7+ 0.7- 870902 400 1.0- 0.5+ 980831 704 0.6- 1.8- 760925 095 (2.6- 2.5+) 870903 400 1.8+ 1.4+ 980831 704 (2.6- 0.5+) 760927 675 (2.8- 0.9+) 870903 400 1.8+ 2.2+ 980831 704 0.4+ 1.1+ 760927 046 0.2+ 0.1- 870904 657 (0.1- 2.6-) 980831 704 1.3+ 0.9+ 760927 046 2.2- 0.0 870919 071 0.9+ 0.6- 980831 704 1.6- 1.1- 760928 095 0.5- 1.8- 870919 071 (7.0+ 4.0-) 980901 046 0.1+ 0.1+ 760929 094 1.5- 0.7- 870919 071 (8.1+ 2.3-) 980901 046 0.1- 0.1+ 760929 095 0.8- 0.4+ 870920 071 1.3+ 2.1- 980901 046 0.2- 0.0 761019 323 0.6+ 1.1+ 870921 071 0.1- 2.3- 980902 360 0.2+ 0.0 761025 046 1.6+ 1.1- 870921 657 (3.5+ 0.1-) 980902 360 0.2+ 0.1+ 761026 046 (3.1+ 0.5-) 870921 046 (4.4- 0.9+) 980902 867 0.1- 0.3- 761027 801 (2.6+ 2.9+) 870921 056 0.3+ 1.0- 980902 867 0.3+ 0.1+ 761027 046 (4.1+ 0.5-) 870921 046 (4.1- 0.5+) 980916 693 1.1+ 0.3+ 761027 046 (4.0+ 3.9+) 870921 071 0.0 1.4+ 980916 693 1.2+ 0.3+ 761124 413 0.3+ 0.0 870922 071 0.2- 1.8+ 980916 693 1.2+ 0.2+ 761124 413 1.9- 1.7- 870922 056 1.3- 1.9+ 981002 360 0.5+ 0.2+ 761127 691 0.0 0.5+ 870922 056 0.6- 1.1- 981002 360 0.9+ 0.2+ 761224 693 (4.4- 6.4-)Y 870922 071 0.7- 0.2- 981002 372 1.3- 1.0+ 761224 693 (0.8+ 9.6-)Y 870922 071 2.3- 0.9+ 981002 372 0.4- 2.5+ 1977/ 870924 095 0.7+ 2.3+ 981016 504 1.3- 0.2+ 770121 801 (4.0+ 3.5+) 870927 095 0.2+ 0.7+ 981016 504 0.6- 0.6- 1987/ 870928 056 0.0 0.5- 981025 867 0.1- 0.4- 870216 675 0.0 0.7+ 870928 056 1.2+ 0.4- 981025 867 0.2+ 0.4- 870216 675 0.7- 0.8+ 870928 491 (3.1+ 10.1+) 981025 867 0.2+ 0.4- 870317 675 0.3+ 0.4+ 870929 657 0.3- 0.7+ 981029 699 1.2+ 0.2+ 870317 675 0.3+ 0.3+ 871013 657 2.4- 2.0- 981029 699 2.0+ 0.9- 870317 675 0.2+ 0.1+ 871014 046 (3.2- 0.8+) 981029 699 0.4- 0.1- 870619 657 (0.9- 3.4-) 871014 046 2.1- 0.5+ 981029 360 0.3+ 0.6- 870622 399 (5.0- 1.2+) 871019 801 1.0+ 1.0- 981029 360 0.5+ 0.3- 870622 399 (3.3- 1.2+) 871019 657 1.5+ 0.1- 981115 360 0.5- 0.3- 870623 400 2.2- 1.6- 871021 494 (0.3- 5.1-) 981115 360 0.4- 0.3- 870623 897 0.2+ 0.6- 871022 809 0.2+ 0.8+ 981125 360 0.3+ 0.4- 870623 897 2.4+ 1.4+ 871022 323 0.1+ 0.4+ 981125 360 0.1+ 0.5- 870624 801 1.7+ 1.8+ 871023 809 0.2- 0.4+ 981128 402 0.9+ 0.2+ 870624 657 0.2+ 1.4- 871023 657 2.2+ 1.5+ 981128 402 0.4+ 1.1- 870625 657 0.2- 1.7- 871024 809 0.0 1.0+ 981128 402 0.3- 1.2- 870625 372 1.2- 0.6+ 871027 809 0.0 0.3+ 981217 360 0.4+ 0.0 870626 657 (1.4- 3.0-) 871028 056 1.3- 0.3+ 981217 360 0.5+ 0.2- 870626 657 0.5- 2.5- 871028 056 (1.1- 2.8+) 870628 657 (0.9- 3.4-) 871029 809 0.7+ 1.3+ ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2006 Apr. 7