OAA computing section circular NK 828 P/2001 BB50 (LINEAR-NEAT)

The following improved orbital elements, by S. Nakano, are from 96 observations 2001 Jan. 21 to June 18. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.56 arc second. Epoch = 2001 Jan. 11.0 TT T = 2001 Jan. 30.41304 +/- 0.00569 (m.e.) TT Peri. = 189.33909 +/- 0.00713 Node = 355.81650 +/- 0.00709 (2000.0) Inc. = 10.61769 +/- 0.00028 q = 2.3468321 +/- 0.0001316 AU e = 0.5868223 +/- 0.0000165 a = 5.6799586 +/- 0.0000689 AU n' = 0.07280921 +/- 0.00000132 P = 13.537 +/- 0.0002463 years (+/- 0.09 day) The predicted orbit for the 2014 return is as follows: T = 2014 Sept. 3.67759 TT Epoch = 2014 Sept.20.0 TT Peri. = 193.47863 e = 0.5873118 Node = 351.18596 (2000.0) a = 5.7248960 AU Inc. = 10.36732 n'= 0.07195362 q = 2.3625968 AU P = 13.698 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2001/ 010321 322 0.0 0.2+ 010422 900 (2.1- 0.8+) 010121 704 0.1+ 0.6+ 010331 360 0.1+ 0.8- 010422 900 0.5- 0.5+ 010121 704 0.2+ 0.0 010331 360 0.3+ 0.7- 010422 402 0.4+ 0.3- 010121 704 0.3- 0.7- 010331 046 0.6+ 0.4- 010422 402 0.1+ 0.1- 010121 704 0.1- 0.5+ 010331 046 0.1+ 0.5- 010422 402 0.1- 0.6- 010121 704 0.4+ 0.6- 010331 046 0.1+ 0.2- 010423 046 0.5+ 0.1- 010126 704 0.4+ 0.1- 010401 046 0.1+ 0.2- 010423 046 0.1+ 0.4+ 010126 704 0.2+ 0.4- 010401 046 0.1+ 0.3- 010424 046 0.1+ 0.4+ 010126 704 0.8- 0.7+ 010401 349 0.9- 0.1- 010424 046 0.2- 0.4- 010126 704 0.2- 1.0+ 010401 349 0.8+ 1.1- 010429 046 0.2- 0.1+ 010126 704 1.0- 0.0 010401 349 0.2+ 0.1+ 010429 046 0.3+ 0.2- 010318 704 1.6- 1.1+ 010401 349 0.7+ 1.6+ 010429 046 0.4+ 0.1- 010318 704 0.3- 0.8- 010402 046 0.0 0.7- 010429 046 0.6+ 0.2+ 010318 704 0.8+ 0.8- 010402 046 0.0 0.2+ 010512 367 0.1+ 0.9+ 010320 608 0.3- 0.5+ 010402 046 0.0 0.3- 010512 367 0.2+ 0.7+ 010320 608 0.5- 0.6+ 010402 046 0.1+ 0.2- 010512 367 0.7- 0.2+ 010320 608 0.4- 0.4+ 010403 402 0.4+ 0.6+ 010512 360 0.8+ 1.1- 010321 859 1.1- 0.6+ 010403 402 0.7+ 0.0 010512 360 0.8+ 0.1- 010321 859 0.5- 1.0- 010403 402 0.5+ 0.0 010513 402 0.3+ 1.0+ 010321 808 (0.6+ 2.2+) 010404 608 0.4+ 0.5+ 010513 402 0.7+ 0.4- 010321 859 0.3- 0.0 010404 608 0.2+ 0.5+ 010513 402 0.1- 0.7+ 010321 808 (0.5+ 2.6+) 010404 608 0.5+ 0.7+ 010617 644 0.6- 0.7- 010321 808 0.8+ 1.1+ 010404 402 0.6- 0.1+ 010617 644 0.0 0.5- 010321 704 0.2- 0.3- 010404 402 0.2+ 0.1- 010617 644 0.3- 0.3- 010321 926 0.7+ 0.4- 010404 402 0.2- 0.6- 010617 320 0.6- 0.1- 010321 926 0.2+ 0.6- 010416 704 0.1+ 1.2+ 010617 320 0.6- 0.0 010321 704 1.2+ 0.1- 010416 704 0.8- 1.9+ 010618 644 0.2+ 0.4+ 010321 926 0.0 0.3- 010416 704 1.4- 0.4+ 010618 644 0.2- 0.2- 010321 926 0.6+ 0.5- 010416 704 0.9- 0.7- 010618 644 0.1+ 0.3+ 010321 704 0.9- 0.5- 010421 704 0.8+ 0.2- 010618 320 0.1- 0.7- 010321 926 0.0 0.3+ 010421 704 0.8+ 0.0 010618 320 0.2- 0.4+ 010321 926 0.5- 0.2- 010421 704 (1.5- 2.0-) 010618 320 0.3- 0.4- 010321 322 0.2- 0.4- 010421 704 0.9- 0.1+ 010618 320 0.5- 0.4+ 010321 322 0.4- 0.7- 010421 704 0.2+ 0.4- ( ) -------- Rejected Obs.

Director, Computing Section Syuichi Nakano 2001 Dec. 22

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