OAA computing section circular NK 1122R 161P/Hartley-IRAS (1983 V1 = 2004 V2)
The following improved orbital elements, by S. Nakano, are from 79 observations 1983 to 2004. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 1.26 arc seconds. See a previous orbit in NK 845. Epoch = 2005 July 9.0 TT T = 2005 June 20.84084 +/- 0.00175 (m.e.) TT Peri. = 47.07556 +/- 0.00019 Node = 1.39966 +/- 0.00013 (2000.0) Inc. = 95.69706 +/- 0.00006 q = 1.2751353 +/- 0.0000018 AU e = 0.8350823 +/- 0.0000002 a = 7.7319511 +/- 0.0000019 AU n' = 0.04584273 +/- 0.00000002 P = 21.500 +/- 0.0000080 years T = 1984 Jan. 8.70546 TT Epoch = 1984 Jan. 21.0 TT Peri. = 47.11163 e = 0.8338320 Node = 1.50103 (2000.0) a = 7.7176426 AU Inc. = 95.73080 n'= 0.04597027 q = 1.2824254 AU P = 21.440 years The predicted orbit for the 2026 return is as follows: T = 2026 Nov. 27.50416 TT Epoch = 2026 Nov. 16.0 TT Peri. = 47.06860 e = 0.8361999 Node = 1.47722 (2000.0) a = 7.7237923 AU Inc. = 95.79116 n'= 0.04591538 q = 1.2651583 AU P = 21.466 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1983/ 840301 168 (5.1+ 4.7+) 840418 168 2.4+ 0.3+ 831104 413 (2.1- 9.6+) 840302 168 0.5- 1.2+ 840418 168 (4.8+ 0.7+) 831104 413 (3.2- 9.3+) 840302 372 2.0+ 0.0 840418 168 0.3+ 1.2+ 831123 413 (0.0 5.1+) 840303 168 1.8+ 0.8+ 840420 675 0.4- 1.8+ 831123 413 0.7+ 1.1+ 840303 168 1.3+ 1.0+ 840420 102 (4.4- 1.6+) 831127 675 (0.8+ 3.8+) 840304 168 1.2+ 2.5- 840421 675 0.7+ 2.0+ 831128 675 (5.0+ 8.4-) 840304 168 (1.2+ 5.5-) 840422 168 (1.3+ 4.5+) 831130 688 (3.1+ 1.9+) 840304 168 0.0 1.4+ 840423 168 (4.2+ 6.5+) 831130 657 (4.7+ 9.0+) 840304 372 1.8+ 0.0 840425 657 1.6- 0.9- 831130 688 0.9+ 1.3+ 840308 168 (5.0+ 2.8-) 840426 657 0.1- 1.0- 831201 657 1.1+ 0.4+ 840309 168 0.2- 0.3+ 840427 657 (6.6- 0.4-) 831201 801 1.3- 1.3+ 840311 675 1.2+ 2.0- 840428 801 (0.8- 2.8-) 831203 046 (1.4- 3.3+) 840321 102 (7.7+ 7.8-) 840503 168 1.1+ 1.6- 831203 046 (1.1- 3.4-) 840322 168 0.5- 2.2+ 840525 095 (4.5- 2.4+) 831204 657 (4.3+ 2.5+) 840327 114 0.7- 1.6+ 840528 095 0.1- 1.4- 831204 046 0.9- 1.8+ 840327 114 (1.5- 3.2+) 840604 801 (3.2- 1.1+) 831204 046 (1.8+ 5.6-) 840328 136 (0.5- 5.0-) 2004/ 831205 688 0.3+ 1.0- 840328 801 1.7+ 2.4- 041103 413 0.3- 0.6- 831205 688 1.2+ 1.2- 840328 381 2.2+ 0.6- 041103 413 0.3- 0.9- 831207 046 0.4- 1.0+ 840329 168 2.5- 2.6- 041103 413 0.2- 0.4- 831207 046 2.1+ 0.2+ 840329 168 1.8- 0.3+ 041105 474 0.0 0.3- 831208 707 1.0+ 1.7+ 840329 168 (0.7- 3.8-) 041105 474 0.1- 1.0- 831208 413 (3.6- 2.0+) 840329 114 2.1- 0.8+ 041105 474 0.4- 0.9- 831208 413 (4.0+ 2.8-) 840330 657 2.3+ 2.3- 041105 474 0.5- 0.7+ 831208 801 1.2- 0.8+ 840331 114 1.9+ 0.1+ 041105 413 0.5- 0.1- 831225 984 1.6+ 2.3+ 840401 136 (1.1- 7.5+) 041106 415 0.4- 0.4- 831229 688 0.6- 1.9- 840401 136 2.5- 0.1+ 041106 415 0.3+ 0.3+ 831229 688 2.5+ 0.5- 840401 136 1.8- 0.5+ 041106 415 0.2- 0.3- 1984/ 840402 657 2.0- 1.5- 041106 415 0.4- 0.6- 840101 801 0.2- 0.7- 840402 114 0.1- 0.9+ 041106 415 0.3+ 1.2- 840104 502 (2.4+ 4.1-) 840403 114 (3.4- 2.5+) 041107 E12 0.2- 0.6- 840107 801 1.7- 1.5- 840405 491 0.2- 1.2- 041107 E12 1.2- 0.5+ 840109 801 2.1- 2.0- 840406 491 0.6+ 0.7- 041107 E12 0.0 0.5+ 840211 675 0.3+ 2.1- 840406 168 2.4+ 0.7- 041107 E12 0.5+ 0.3+ 840225 168 1.2- 1.2- 840407 168 (3.4+ 3.9-) 041112 415 0.5- 1.1- 840225 168 1.3- 2.2- 840408 675 (4.5- 11.5+) 041112 415 0.6- 1.2- 840226 168 1.8- 2.0- 840413 657 (2.9- 1.6+) 041117 415 0.7+ 0.1+ 840226 168 1.9- 0.4+ 840417 168 0.9- 1.4- 041117 415 0.5- 1.1- 840227 114 2.2- 0.2+ 840417 168 0.9- 1.5+ ( ) -------- Rejected Obs.
Director, Computing Section Revised version Syuichi Nakano 2004 Nov. 24