OAA computing section circular NK 822 49P/Arend-Rigaux

The following improved orbital elements, by S. Nakano, are from 257 observations 1951-1999, 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 +/- 1.05 arc seconds. See a previous computation in NK 624. Epoch = 1998 July 6.0 TT T = 1998 July 12.59517 +/- 0.00030 (m.e.) TT Peri. = 330.56161 +/- 0.00007 Node = 121.72925 +/- 0.00004 (2000.0) Inc. = 18.29065 +/- 0.00002 q = 1.3685906 +/- 0.0000005 AU e = 0.6115411 +/- 0.0000001 a = 3.5231283 +/- 0.0000005 AU n' = 0.14904293 +/- 0.00000003 P = 6.613 +/- 0.0000015 years A1 = +0.016 +/- 0.004 A2 = -0.00043 +/- 0.00003 T = 1950 Dec. 18.92208 TT Epoch = 1950 Dec. 25.0 TT Peri. = 326.28742 e = 0.6102646 Node = 125.39639 (2000.0) a = 3.5573970 AU Inc. = 17.18379 n'= 0.14689451 q = 1.3864435 AU P = 6.710 years T = 1957 Sept. 6.58669 TT Epoch = 1957 Aug. 30.0 TT Peri. = 326.41578 e = 0.6104259 Node = 125.30430 (2000.0) a = 3.5572619 AU Inc. = 17.19597 n'= 0.14690288 q = 1.3858169 AU P = 6.709 years T = 1964 June 5.65127 TT Epoch = 1964 June 14.0 TT Peri. = 328.88961 e = 0.6002615 Node = 122.26896 (2000.0) a = 3.5952046 AU Inc. = 17.84317 n'= 0.14458348 q = 1.4371416 AU P = 6.817 years T = 1971 Apr. 6.01770 TT Epoch = 1971 Mar. 30.0 TT Peri. = 328.95334 e = 0.5990935 Node = 122.23748 (2000.0) a = 3.6027791 AU Inc. = 17.82953 n'= 0.14412776 q = 1.4443776 AU P = 6.838 years T = 1978 Feb. 2.48296 TT Epoch = 1978 Feb. 21.0 TT Peri. = 329.00320 e = 0.5995723 Node = 122.20571 (2000.0) a = 3.6003261 AU Inc. = 17.85184 n'= 0.14427508 q = 1.4416703 AU P = 6.831 years T = 1984 Dec. 1.41165 TT Epoch = 1984 Dec. 6.0 TT Peri. = 328.92212 e = 0.5987423 Node = 122.23418 (2000.0) a = 3.6041405 AU Inc. = 17.84042 n'= 0.14404610 q = 1.4461892 AU P = 6.842 years T = 1991 Oct. 2.71708 TT Epoch = 1991 Sept.21.0 TT Peri. = 329.07606 e = 0.6000497 Node = 122.13407 (2000.0) a = 3.5950174 AU Inc. = 17.88395 n'= 0.14459477 q = 1.4378283 AU P = 6.816 years The predicted orbit for the 2005 return is as follows: T = 2005 Feb. 24.55864 TT Epoch = 2005 Mar. 11.0 TT Peri. = 330.70183 e = 0.6115935 Node = 121.64818 (2000.0) a = 3.5235019 AU Inc. = 18.30208 n'= 0.14901922 q = 1.3685512 AU P = 6.614 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1951/ 771204 323 0.5- 0.4- 1989/ 510108 711 0.7+ 1.6- 771205 809 1.0+ 1.9- 890406 807 0.5- 1.0+ 510108 711 0.6- 1.9- 771210 879 0.4+ 0.5+ 890602 568 0.5- 0.0 510204 711 (0.1+ 3.4+) 771210 879 0.8- 2.3+ 890602 568 0.2- 1.4+ 510204 711 0.1- 1.2- 771229 805 (1.7- 3.2-) 890602 568 0.8- 0.5+ 510204 711 (0.8+ 3.2+) 1978/ 890602 568 0.3- 1.8+ 510204 711 (0.0 3.2+) 780103 323 1.8- 0.0 890801 568 0.5- 1.2+ 510205 012 (5.0- 2.9-) 780108 885 0.8- 2.4+ 890801 568 0.1+ 0.9+ 510206 012 (3.3- 0.6-) 780108 885 2.0- 1.0+ 890801 568 0.2+ 0.6+ 510206 012 (4.2- 2.3-) 780109 805 (0.1- 2.8+) 890801 568 1.3- 1.3+ 510207 012 2.2- 0.9+ 780110 805 2.5- 1.9- 890801 568 0.6- 1.1+ 510208 672 0.2- 0.0 780113 801 1.2- 0.3+ 890801 568 0.6- 0.7+ 510208 056 (1.8- 2.9-) 780128 323 0.7- 0.4+ 890801 568 0.8- 0.3+ 510208 008 0.2- 0.0 780211 801 0.3- 0.3+ 890801 568 1.0- 1.3+ 510210 008 0.9+ 0.8+ 780302 323 (5.0+ 1.1+) 890801 568 0.5- 1.2+ 510211 711 0.6+ 0.3- 780305 381 0.1+ 1.0+ 890801 568 0.8- 1.3+ 510211 012 1.7- 0.2+ 780312 885 (3.0- 0.1-) 890801 568 0.3- 0.4+ 510211 008 0.5+ 0.6- 1984/ 890803 568 0.5- 0.9+ 510212 711 0.9+ 0.7- 840807 675 0.4+ 0.1+ 890803 568 0.3- 0.5+ 510212 008 1.2+ 0.1- 840808 675 0.7- 0.1- 890803 568 0.6- 0.4+ 510213 012 0.7+ 1.4- 840808 372 (4.1- 0.3-) 890803 568 1.1- 0.5+ 510213 711 0.3+ 2.3- 840809 707 (3.6- 2.0-) 890803 568 0.2- 1.1+ 510213 008 0.0 0.6- 840825 801 2.3+ 0.1+ 890803 568 0.4- 0.9+ 510216 008 0.7+ 0.6- 840926 809 2.0+ 1.4- 1990/ 510223 008 0.9+ 0.9- 840927 809 0.8- 0.6+ 900429 807 (0.0 4.0-) 510226 012 (0.9+ 4.2+) 840927 809 0.1- 0.8+ 900429 807 (0.7- 4.8-) 510227 012 (4.0+ 1.5+) 840928 809 1.3- 0.6- 900918 675 0.9+ 0.5+ 510228 754 0.5- 1.0+ 840928 809 1.2- 0.6- 900918 675 0.7+ 0.0 510228 012 2.4- 0.6+ 840929 809 0.3+ 0.9- 1991/ 510303 012 2.1+ 2.1+ 840929 809 1.0+ 0.9- 910801 372 0.1+ 1.9+ 510304 012 0.7- 0.1+ 840930 809 1.3- 0.5- 910801 372 2.5- 1.1+ 510305 012 0.5+ 0.8+ 841023 114 (5.1- 0.3+) 910802 372 0.4- 1.8+ 510305 012 2.2+ 2.0+ 841023 114 0.4+ 0.1- 910905 657 0.4- 0.3+ 510306 012 1.0- 1.7+ 841024 114 0.4+ 1.9+ 910905 657 0.4+ 0.6+ 510312 008 1.0- 2.0+ 841025 491 0.9- 0.5+ 910912 691 1.8- 1.0+ 510312 008 1.0+ 0.2- 841025 801 1.4+ 0.3+ 910912 691 2.1- 1.1+ 510327 754 (1.1+ 3.9-) 841025 114 1.1+ 0.5+ 910912 691 (4.4- 1.3+) 510403 754 (3.9+ 0.4-) 841026 688 (4.8- 0.9-) 910915 691 1.5- 0.3+ 510403 754 (0.8+ 3.0+) 841026 688 0.7- 0.9- 910915 691 1.7- 0.5+ 510405 012 (3.6+ 3.6-) 841030 491 0.1+ 1.8+ 910915 691 1.4- 0.1+ 510406 662 1.5- 1.0+ 841114 323 1.1- 0.7+ 1992/ 510406 662 1.6- 0.9+ 841120 801 2.0+ 0.4+ 920313 658 0.3- 0.4+ 1958/ 841120 688 1.0- 0.9+ 920313 658 0.3- 0.2+ 580129 689 1.8+ 0.9+ 841120 688 1.3- 1.7+ 1993/ 580131 689 1.1+ 0.1+ 841122 056 2.6- 2.6+ 930529 691 0.0 0.3- 580131 689 0.9+ 0.2+ 841122 056 (0.6- 4.1+) 930529 691 0.2+ 0.1- 580212 689 2.0+ 0.5- 841123 114 (0.3+ 3.9+) 930529 691 0.0 0.5- 580212 689 1.3+ 0.3+ 841123 293 (1.6- 3.5+) 930529 691 0.6+ 0.3- 580216 689 2.4+ 1.8+ 841126 801 0.4+ 0.2+ 930529 691 0.3+ 0.4- 580216 689 2.4+ 1.1+ 841127 114 (2.1+ 7.6+) 930627 691 0.2+ 0.0 580410 689 0.7+ 0.2+ 841127 491 0.4- 2.5+ 930627 691 0.6- 0.4- 580410 689 0.3+ 0.6+ 841127 474 0.2- 0.2+ 930627 691 0.2- 0.4- 580512 689 0.1+ 1.9+ 841127 474 0.1+ 0.1- 930722 691 0.5- 0.8- 580512 689 0.1- 2.1+ 841127 323 0.7- 0.6+ 930722 691 0.4+ 0.9- 580607 689 0.4- 2.2+ 841128 491 1.4- 1.0+ 930722 691 1.8+ 0.2+ 580607 689 0.6- 2.5+ 841130 114 0.8+ 1.2+ 1997/ 1963/ 841201 114 0.5+ 0.6+ 970628 568 0.9+ 1.1+ 630824 689 0.4+ 2.0+ 841201 114 2.5+ 2.5+ 970628 568 0.5+ 1.1+ 630824 689 0.6- 1.6+ 841205 657 1.5- 1.0- 970629 568 0.5+ 0.8+ 630912 689 0.8+ 1.3- 841217 323 0.9+ 0.4+ 970629 568 0.9+ 1.0+ 630912 689 0.4+ 1.4- 841218 801 0.8+ 0.7+ 970714 696 0.5+ 1.2+ 630921 689 0.2- 1.5+ 841220 114 0.1+ 1.0+ 970714 696 1.1+ 0.8+ 630923 689 0.0 0.6- 841222 114 (1.2- 9.8+) 970714 696 0.9+ 1.1+ 630925 689 0.5- 0.4+ 841223 801 1.6+ 0.2+ 970827 360 1.0+ 0.3+ 630925 689 0.6- 0.6+ 841223 293 0.0 1.9+ 970827 360 1.0+ 0.1+ 631018 689 0.3- 0.4+ 841223 114 0.9- 1.3+ 970827 360 1.5+ 0.2- 631018 689 1.9- 0.5+ 841224 114 1.4- 1.9+ 971205 691 0.5+ 0.1+ 631217 689 2.7+ 0.5+ 841225 114 1.6- 2.2+ 971205 691 0.4+ 0.3- 631218 689 0.8+ 1.1- 841227 114 0.8+ 1.2- 1998/ 1970/ 1985/ 981216 360 0.4- 0.1- 700727 691 1.6- 0.3+ 850114 323 0.3+ 1.0- 981216 360 0.2+ 0.1+ 700727 691 1.8- 0.9+ 850115 657 1.0- 0.2+ 981216 360 0.1+ 0.3+ 700801 821 1.8- 1.3+ 850118 691 1.0+ 0.3+ 981224 360 0.6+ 0.5+ 700801 821 1.9- 0.5+ 850118 691 1.3+ 1.8- 981224 360 0.6+ 0.9+ 700805 821 0.1+ 1.0- 850118 691 1.4+ 0.9- 981224 360 0.6+ 0.6+ 700805 821 0.4+ 0.1- 850120 691 0.7+ 2.0- 1999/ 700807 821 1.5+ 0.5- 850120 691 (1.0+ 2.8-) 990126 360 0.5- 0.4+ 700807 821 2.1+ 0.1+ 850120 691 1.3+ 1.8- 990126 360 0.2- 0.1+ 700926 691 1.3- 0.2- 850120 801 0.1+ 0.2- 990212 693 0.1+ 1.1+ 700926 691 1.1- 0.2+ 850120 056 0.2+ 1.4- 990212 693 0.7+ 0.2+ 1977/ 850121 688 0.3+ 0.8- 990316 360 0.0 0.2+ 770815 801 1.2- 0.5+ 850121 688 0.1- 1.6+ 990316 360 0.4- 0.5+ 770818 801 0.7- 1.0+ 850121 056 0.1- 0.4+ 990318 561 0.0 0.5+ 770819 821 2.0- 0.8+ 850121 056 0.3+ 1.8+ 990318 561 0.1+ 0.5+ 770819 821 0.8- 0.3- 850129 056 1.3- 0.9- 990318 561 0.1- 0.8+ 770820 821 1.2- 0.0 850129 056 0.0 0.3+ 990318 691 0.2- 0.0 770820 821 2.0- 1.3+ 850214 657 1.6- 0.1- 990318 691 0.1- 0.0 770821 821 0.8- 0.3- 850214 657 (0.5- 3.5-) 990318 691 0.2- 0.1- 770821 821 1.5- 0.3- 850215 691 1.6- 1.8- 990318 691 0.3- 0.1+ 770822 821 0.0 0.6+ 850215 381 0.2+ 0.6- 990318 691 0.3- 0.1- 770822 821 0.7- 1.5+ 850216 801 (4.0- 1.0-) 990318 691 0.2- 0.2+ 771007 801 0.3- 0.8- 850221 801 0.3- 1.5+ 990407 360 0.0 1.0+ 771014 485 1.4+ 1.8- 850225 688 (9.1+ 18.2-) 990407 360 0.1+ 0.6+ 771014 485 1.7+ 1.0- 850225 688 (0.6+ 2.9-) 990410 704 0.0 0.9- 771104 323 0.1- 0.3+ 850225 056 (1.8- 2.8-) 990410 704 0.4- 1.6+ 771111 805 0.9+ 0.9+ 850226 056 (3.0- 4.8-) 990410 704 1.5+ 1.2+ 771111 882 (2.8+ 4.8+) 850319 801 0.4+ 1.1+ 990410 704 (0.3+ 2.2+) 771111 882 2.6+ 2.3+ 850324 688 (0.3- 2.9-) 990410 704 0.8+ 0.4+ 771115 805 0.6+ 1.0+ 850324 688 0.3- 2.4- 990414 693 0.7- 0.7+ 771117 413 (3.2- 4.2+)Y 850325 801 0.3- 1.1+ 990414 693 0.5- 0.5+ 771117 413 (0.9- 3.0+)Y 850421 801 0.3- 0.3- 990414 693 0.1- 0.7+ 771118 323 2.6- 1.1+ 1986/ 990513 360 0.3+ 0.6+ 771130 885 (3.6+ 3.7+)Y 860306 695 0.4+ 0.6+ 990513 360 0.5+ 0.6+ 771201 882 (0.1+ 4.7+) 860306 695 0.5+ 1.0+ 990514 704 1.3- 1.0+ 771202 879 0.9+ 0.3- 1988/ 990514 704 (0.8- 2.0+) 771202 879 1.8+ 0.4- 880517 568 (2.9+ 0.7-) 990514 704 1.5+ 0.1- 771204 809 0.9+ 1.0- 880517 568 2.4+ 0.1+ 990514 704 (2.3+ 0.1-) ( ) -------- Rejected Obs.

Director, Computing Section Syuichi Nakano 2001 Dec. 20

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