OAA computing section circular NK 851A 3D/Biela-A
The following improved orbital elements, by S. Nakano, are from 19 observations 1846 to 1852. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 3.41 arc seconds. Epoch = 1852 Sept.29.0 TT T = 1852 Sept.23.54720 +/- 0.00045 (m.e.) TT Peri. = 223.19813 +/- 0.00196 Node = 248.00501 +/- 0.00151 (2000.0) Inc. = 12.54916 +/- 0.00057 q = 0.8606055 +/- 0.0000034 AU e = 0.7558707 +/- 0.0000010 a = 3.5252034 +/- 0.0000057 AU n' = 0.14891135 +/- 0.00000036 P = 6.619 +/- 0.0000159 years T = 1846 Feb. 11.49290 TT Epoch = 1846 Jan. 24.0 TT Peri. = 223.05761 e = 0.7566148 Node = 248.13892 (2000.0) a = 3.5189123 AU Inc. = 12.57581 n'= 0.14931086 q = 0.8564512 AU P = 6.601 years The predicted orbit for the 2005 return is as follows: T = 2005 Aug. 12.63368 TT Epoch = 2005 Aug. 18.0 TT Peri. = 268.40385 e = 0.7685081 Node = 200.84502 (2000.0) a = 3.5244145 AU Inc. = 8.04752 n'= 0.14896135 q = 0.8158734 AU P = 6.617 years The next prediction is from a predicted orbit of the first component computed from 26 observations 1826-1852 with the mean residual 1".70 published on AJ 76, p1140, Table VI. T = 2005 Feb. 1.48239 TT Epoch = 2005 Jan. 30.0 TT Peri. = 259.17466 e = 0.7725800 Node = 209.89304 (2000.0) a = 3.4961873 AU Inc. = 7.67847 n'= 0.15076900 q = 0.7951030 AU P = 6.54 ”N The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1846/ 460220 500 5.0- 3.0+ 1852/ 460115 058 1.9+ 3.1+ 460221 007 2.1- 0.3- 520902 034 1.7- 9.0- 460120 000 1.3+ 1.8+ 460301 007 0.0 0.2+ 520920 034 7.1- 8.7- 460125 786 1.5- 1.8+ 460303 500 0.1- 3.5+ 520921 084 2.0+ 0.1- 460127 058 0.1+ 0.8+ 460311 058 0.4+ 0.3+ 520922 503 3.7- 6.3- 460203 500 0.7- 0.2+ 460315 786 1.3+ 3.9- 520924 084 3.3- 0.4+ 460211 500 0.5- 3.0+ 460319 500 4.5+ 0.4- 520926 084 1.9- 6.0- ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2002 May 8