OAA computing section circular NK 656 33P/Daniel

The following improved orbital elements, by S. Nakano, are from 38 observations 1979-1993, 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 +/- 0.75 arc second. Epoch = 1992 Sept.15.0 TT T = 1992 Sept. 1.67250 +/- 0.00054 (m.e.) TT Peri. = 11.00738 +/- 0.00039 Node = 69.05335 +/- 0.00020 (2000.0) Inc. = 20.13596 +/- 0.00003 q = 1.6494453 +/- 0.0000049 AU e = 0.5519661 +/- 0.0000014 a = 3.6815186 +/- 0.0000043 AU n' = 0.13952871 +/- 0.00000024 P = 7.064 +/- 0.0000123 years A1 = +0.311 +/- 0.045 A2 = +0.07449 +/- 0.00097 [ T = 1971 May 31.69777 TT Epoch = 1971 June 18.0 TT Peri. = 10.83500 e = 0.5486783 Node = 69.17038 (2000.0) a = 3.7009396 AU Inc. = 20.11629 n'= 0.13843187 q = 1.6703143 AU P = 7.120 years ] T = 1978 July 8.40495 TT Epoch = 1978 June 21.0 TT Peri. = 10.84103 e = 0.5499510 Node = 69.17991 (2000.0) a = 3.6920294 AU Inc. = 20.14160 n'= 0.13893330 q = 1.6615940 AU P = 7.094 years T = 1985 Aug. 4.23877 TT Epoch = 1985 Aug. 3.0 TT Peri. = 10.83869 e = 0.5518066 Node = 69.13599 (2000.0) a = 3.6839133 AU Inc. = 20.14429 n'= 0.13939268 q = 1.6511056 AU P = 7.071 years The predicted orbit for the 2000 return is as follows: T = 2000 June 23.50046 TT Epoch = 2000 June 25.0 TT Peri. = 18.98942 e = 0.4635939 Node = 66.58167 (2000.0) a = 4.0216897 AU Inc. = 22.40969 n'= 0.12220563 q = 2.1572587 AU P = 8.065 years The following residuals in seconds of arc are from the above orbital elements: 19/ 19/ 19/ 790202 413 (0.9- 3.8-) 920808 372 0.0 1.3+ 930121 360 1.9+ 0.2- 790202 413 0.9- 0.3- 920809 372 1.0+ 0.5- 930121 360 1.5+ 1.1- 790207 413 0.1- 0.8- 920929 691 0.1+ 0.2- 930124 691 0.8- 0.3+ 850727 675 0.4- 1.0+ 920929 691 1.3- 0.3- 930124 691 0.6- 0.0 850727 675 1.4- 0.4+ 920929 691 0.9- 0.3- 930124 691 1.2- 0.0 850728 675 0.4+ 1.1+ 921025 360 (0.8+ 3.2-) 930219 360 (5.4- 3.4-) 850728 675 0.3- 0.8+ 921025 360 (0.9+ 2.3-) 930219 360 (3.4- 3.6-) 850729 675 0.1+ 0.5+ 921025 360 (1.1+ 2.4-) 930330 691 1.0- 0.4+ 850729 675 0.6- 0.8+ 921030 411 (3.3+ 1.2+) 930330 691 0.4- 0.5+ 860211 691 0.3+ 1.0- 921030 411 0.6+ 0.7- 930330 691 0.7- 0.6+ 860211 691 0.3- 0.9- 921030 411 (2.1+ 2.0-) 930422 691 1.0+ 1.0+ 860211 691 0.2- 1.6- 921130 360 0.7+ 0.1+ 930422 691 0.2+ 0.3+ 860307 691 0.2- 0.0 921130 360 0.9+ 0.2- 930422 691 0.3+ 0.7+ 860307 691 0.3+ 0.8+ 921202 691 0.5- 0.7- 930528 691 0.9+ 0.8+ 860307 691 0.1- 1.5+ 921202 691 0.6- 0.5- 930528 691 0.2+ 1.3+ 920729 372 (2.4+ 1.3-) 921202 691 0.3- 0.4- ( ) -------- Rejected Obs.

Director, Computing Section Syuichi Nakano 1997 May 3

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