OAA computing section circular NK 839 D/1952 B1 (Harrington-Wilson)

The following improved orbital elements, by S. Nakano, are from 7 observations 1952 Jan. 30 to 1952 Feb. 25. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.49 arc second. Epoch = 1951 Nov. 10.0 TT T = 1951 Oct. 30.36469 +/- 0.02629 (m.e.) TT Peri. = 343.02853 +/- 0.01612 Node = 128.47848 +/- 0.01435 (2000.0) Inc. = 16.35286 +/- 0.00331 q = 1.6648865 +/- 0.0025474 AU e = 0.5142599 +/- 0.0005430 a = 3.4275255 +/- 0.0018950 AU n' = 0.15532202 +/- 0.00012881 P = 6.346 +/- 0.0052624 years (+/- 1.92 day) The predicted orbit for the 2004 return is as follows: T = 2004 Dec. 25.80296 TT Epoch = 2004 Dec. 21.0 TT Peri. = 346.16932 e = 0.4697978 Node = 123.82159 (2000.0) a = 3.5523503 AU Inc. = 18.35157 n'= 0.14720765 q = 1.8834640 AU P = 6.695 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1952/ 520219 672 0.4+ 1.0- 520221 672 0.6+ 0.4+ 520130 675 0.2+ 0.6- 520219 672 0.1- 0.0 520225 672 0.2- 0.3+ 520204 675 0.3- 0.9+ 520221 672 0.5- 0.1- ( ) -------- Rejected Obs.

Director, Computing Section Syuichi Nakano 2002 May 4

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