OAA computing section circular NK 646R 55P/Tempel-Tuttle
The following improved orbital elements, by S. Nakano, are from 160 observations 1866-1998, 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 +/- 0.82 arc seconds. See previous computation on NK 646. Epoch = 1998 Mar. 8.0 TT T = 1998 Feb. 28.09819 +/- 0.00008 (m.e.) TT Peri. = 172.49883 +/- 0.00023 Node = 235.25831 +/- 0.00020 (2000.0) Inc. = 162.48600 +/- 0.00003 q = 0.9765769 +/- 0.0000012 AU e = 0.9055305 +/- 0.0000003 a = 10.3374862 +/- 0.0000038 AU n' = 0.02965389 +/- 0.00000002 P = 33.237 +/- 0.0000188 years A1 = -0.798 +/- 0.009 A2 = +0.00901 +/- 0.00001 T = 1866 Jan. 11.61926 TT Epoch = 1865 Dec. 30.0 TT Peri. = 170.89346 e = 0.9060920 Node = 233.25281 (2000.0) a = 10.3988407 AU Inc. = 162.69023 n'= 0.02939183 q = 0.9765345 AU P = 33.533 years [ T = 1899 July 1.97303 TT Epoch = 1899 July 5.0 TT Peri. = 172.20232 e = 0.9063861 Node = 234.59368 (2000.0) a = 10.3891061 AU Inc. = 162.85264 n'= 0.02943315 q = 0.9725646 AU P = 33.486 years ] [ T = 1932 July 12.69964 TT Epoch = 1932 Aug. 1.0 TT Peri. = 172.68672 e = 0.9051192 Node = 235.06114 (2000.0) a = 10.3135648 AU Inc. = 162.70779 n'= 0.02975712 q = 0.9785593 AU P = 33.122 years ] T = 1965 Apr. 30.00846 TT Epoch = 1965 Apr. 30.0 TT Peri. = 172.56359 e = 0.9044646 Node = 235.11510 (2000.0) a = 10.2748813 AU Inc. = 162.70640 n'= 0.02992532 q = 0.9816144 AU P = 32.936 years The following residuals in seconds of arc are from the above orbital elements: 1865/ 660115 013 7.4- 7.7- 971205 372 0.9- 0.8+ 651221 545(32.8+ 9.3+) 660116 066 4.6- 6.4- 971209 402 0.4- 0.1- 651221 545(42.0+ 18.8+) 660116 066 3.1+ 3.1+ 971209 402 0.2+ 0.1+ 651221 545(64.2+ 17.4-) 660116 055 2.0+ 2.0+ 971209 402 0.1+ 0.1- 651222 545(68.4+ 33.4-) 660117 787 7.6- 6.4- 971210 897 1.0- 0.6- 651222 545(47.1+ 27.9+) 660117 066 0.2+ 5.5- 971210 897 0.2- 0.3- 651222 545(62.5+ 3.1-) 660118 531(15.6- 7.1-) 971210 897 0.4- 0.3- 651222 055(48.1+ 53.8-) 660119 787 (3.5- 16.6+) 971218 897 0.7+ 0.0 651222 534(57.0+ 41.7-) 660119 066 4.0- 5.7+ 971218 897 0.4- 1.1- 651223 534(39.2+ 46.0-) 660119 055 8.6- 3.3- 971218 897 0.8+ 0.3- 651223 534(50.7+ 40.0-) 660119 531(29.9+ 3.6-)Y 971221 897 0.1- 0.7- 651225 534(33.2+ 22.7-) 660120 066 1.6+ 7.5- 971221 897 0.3+ 0.5+ 651225 548(29.2+ 27.8-) 660120 055 5.0- 1.4+ 971221 897 0.4- 0.5- 651226 548(24.8+ 22.2-) 660120 055 2.0- 8.8+ 971224 360 0.4+ 0.3- 651226 055(29.3+ 18.3-) 660120 531(26.7- 6.4-) 971224 360 0.1+ 0.2- 651226 548(25.6+ 1.3+) 660121 066(0.00+ 0.03-)X 971225 402 0.7+ 0.2+ 651226 534(30.1+ 24.8-) 660121 066 (1.5+ 21.2+)X 971225 402 0.4+ 0.1- 651226 055(30.1+ 11.4-) 660121 534 4.8- 4.7- 971225 402 0.4+ 0.0 651227 055(30.5+ 2.4+) 660122 066 4.6- 1.1- 971227 355 0.3+ 0.6- 651229 548(23.0+ 2.6-) 660122 055 3.2+ 8.8+ 971227 355 0.4+ 0.6- 651229 548(13.9+ 1.4-) 660123 066 (2.5+ 11.5-) 971227 355 0.7+ 0.4- 1866/ 660123 534(10.3- 16.8-) 971227 360 0.3+ 0.5- 660102 035(17.1+ 12.6-) 660124 035(14.7+ 1.0-) 971227 360 0.3+ 0.6- 660102 548(11.3+ 10.9+)Y 660128 534(12.3- 11.1+) 971227 897 0.5+ 0.2- 660102 547 5.9+ 4.9+ 660201 055 (4.7+ 34.8-) 971227 897 0.1+ 0.8- 660102 520 3.0+ 4.8+ 660203 066 2.5- 0.8+ 971227 897 0.3+ 0.8- 660102 055(14.1+ 12.5-) 660208 066 7.0- 4.4+ 971230 568 0.5- 0.6- 660102 548 9.5+ 7.7- 660208 066 4.0- 0.2+ 971231 897 0.2- 0.1- 660103 531 (0.4- 10.7-) 660208 066(21.2- 20.6-) 971231 897 0.0 0.2- 660103 013 4.0+ 5.7+ 1965/ 971231 897 0.2+ 0.5- 660104 548 9.4+ 3.6- 650630 074 3.4- 1.2- Y 1998/ 660104 055(11.7+ 4.3-) 650630 675 2.6+ 0.8+ 980101 046 0.8- 0.5+ 660104 055 7.8+ 8.4- 650701 074 3.5- 3.9- Y 980101 046 0.8- 0.2+ 660104 520 0.6- 1.3+ 650726 675 3.1+ 3.9+ 980101 046 0.7- 0.4+ 660104 520 1.7+ 5.0+ 1996/ 980101 758 0.4- 0.4+ 660104 534 5.6+ 2.2- 960512 809 1.7- 0.8+ 980101 758 1.0- 0.2+ 660104 013(12.8+ 1.9+) 960512 809 1.2- 0.7+ 980102 355 0.1+ 0.1+ 660104 534 1.9+ 0.9+ 960512 809 1.5- 0.9+ 980102 355 0.2- 0.8+ 660105 548 0.1+ 5.6+ 1997/ 980102 355 0.2- 0.1- 660105 035 (7.5+ 12.2+) 970304 568 0.2- 0.9+ 980102 867 0.1+ 0.2+ 660105 055 6.4+ 3.3- 970304 568 (2.2+ 0.2-) 980102 867 0.1+ 0.3+ 660105 520 2.5- 1.1+ 970304 568 0.9+ 0.1+ 980102 867 0.1- 0.1+ 660105 534 4.0- 2.4+ 970304 568 0.7+ 0.2+ 980105 897 0.1+ 0.9+ 660106 787 2.8- 3.2- 970307 809 1.2- 0.1+ 980105 897 0.3+ 0.9+ 660106 547 (3.8+ 15.7+) 970415 568 0.1+ 0.4+ 980105 897 0.2- 0.6+ 660106 534 2.8+ 4.2- 970415 568 0.5+ 0.2+ 980107 897 0.5- 1.2+ 660106 787 2.0+ 9.0+ 970415 568 0.4- 0.5+ 980107 897 0.5- 1.7+ 660107 787 8.5- 3.1+ 970417 568 0.5+ 0.2- 980107 897 1.1- 1.4+ 660107 055(11.8+ 9.8+) 970618 568 0.7- 0.3+ 980109 403 (0.8- 2.8+) 660107 531 (4.3+ 18.4-) 970618 568 0.4- 0.3- 980109 403 (1.4- 3.6+) 660107 531 (0.1- 23.7-) 971107 867 0.5- 0.3- 980109 897 (0.2+ 2.2+) 660107 531 (4.7- 25.7-) 971107 867 0.0 1.1+ 980109 897 (0.3- 2.6+) 660107 058 9.6+ 1.9+ 971107 867 (0.2- 2.0+) 980109 143 0.8+ 0.4- 660107 055(11.6+ 4.8-) 971108 867 0.1+ 0.3- 980109 143 0.3+ 1.3- 660107 545 3.9+ 3.7+ 971108 867 0.5- 0.6- 980109 143 0.2+ 0.3+ 660107 013 3.0+ 7.8- 971109 360 0.4+ 0.1- 980109 143 0.2+ 0.2- 660108 055 6.2+ 4.0- 971109 360 0.4- 0.6+ 980109 143 0.4+ 0.0 660109 787(13.0- 5.1-) 971109 360 0.8- 0.5- 980109 143 0.7+ 0.4- 660109 058 1.8- 1.3- 971202 897 1.8- 1.2+ 980109 143 0.6+ 0.7- 660109 055 2.3+ 0.6- 971202 897 0.8- 0.5+ 980109 143 0.1- 0.1+ 660109 520 8.7- 3.9+ 971202 897 0.4+ 0.0 980109 143 0.4+ 0.0 660110 787(10.9- 8.5+) 971202 897 1.1- 0.6+ 980109 143 0.5+ 0.8- 660110 058 8.2+ 2.3- 971203 864 0.2- 1.0- 980109 143 0.1- 0.3+ 660110 058 5.4+ 1.7+ 971203 864 0.3+ 0.5- 980109 143 0.1+ 0.1- 660110 545 (2.1- 10.1-) 971203 372 0.3+ 0.9- 980109 143 0.0 1.4- 660110 545 4.2+ 8.4- 971203 864 0.1- 0.5+ 980109 143 0.1+ 0.6+ 660111 058 2.7- 4.9+ 971204 867 0.3+ 0.0 980109 143 0.4+ 0.0 660111 055 (2.8+ 15.2+) 971204 402 1.0+ 0.7- 980109 143 0.6+ 0.3- 660112 534 3.4- 1.3- 971204 867 0.2+ 0.4- 980109 143 0.0 0.1+ 660113 545 6.5- 4.8+ 971204 867 0.2+ 0.4- 980109 143 0.0 0.0 660114 787(16.0- 17.3-) 971204 360 0.4+ 0.3- 980109 143 0.4+ 0.4+ 660114 787(12.7- 11.3-) 971204 360 0.5+ 0.2+ 980109 143 0.1+ 0.3+ 660114 066 6.4+ 4.0- 971205 402 1.0+ 0.3+ 980110 355 (0.6- 3.2+) 660115 789 1.4+ 0.3+ 971205 402 0.7+ 0.3- 980110 355 (0.3+ 2.7+) 660115 066 1.6- 0.3+ 971205 402 0.5+ 0.8- 980110 355 (0.4- 2.8+) 660115 545(10.2+ 5.8+) 971205 402 0.3+ 0.5- ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 1998 Jan. 12