OAA computing section circular NK 1449 P/Garradd (1977 O1 = 2007 B3)

The following improved orbital elements, by S. Nakano, are from 49 observations 1975 to 2007. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.60 arc second. See an orbit on YC 2545. Epoch = 2008 Apr. 4.0 TT T = 2008 Mar. 20.50086 +/- 0.01871 (m.e.) TT Peri. = 278.74408 +/- 0.00207 Node = 327.85450 +/- 0.00013 (2000.0) Inc. = 28.84387 +/- 0.00005 q = 4.2634744 +/- 0.0000041 AU e = 0.1184071 +/- 0.0000008 a = 4.8361036 +/- 0.0000013 AU n' = 0.09267459 +/- 0.00000004 P = 10.635 +/- 0.0000044 years T = 1976 Mar. 21.31498 TT Epoch = 1976 Mar. 3.0 TT Peri. = 279.00871 e = 0.1162386 Node = 328.02866 (2000.0) a = 4.8868845 AU Inc. = 28.75087 n'= 0.09123384 q = 4.3188400 AU P = 10.803 years [ T = 1986 Dec. 26.58049 TT Epoch = 1987 Jan. 5.0 TT Peri. = 279.16839 e = 0.1170936 Node = 327.93926 (2000.0) a = 4.8576903 AU Inc. = 28.79689 n'= 0.09205753 q = 4.2888858 AU P = 10.706 years ] T = 1997 Aug. 17.46119 TT Epoch = 1997 Aug. 20.0 TT Peri. = 278.92197 e = 0.1177736 Node = 327.91958 (2000.0) a = 4.8292167 AU Inc. = 28.84764 n'= 0.09287291 q = 4.2604622 AU P = 10.612 years The predicted orbit for the 2019 return is as follows: T = 2019 May 4.99040 TT Epoch = 2019 Apr. 27.0 TT Peri. = 283.80395 e = 0.1237698 Node = 327.06737 (2000.0) a = 5.0094893 AU Inc. = 28.40913 n'= 0.08790506 q = 4.3894657 AU P = 11.212 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1975/ 070126 808 0.2+ 0.9- 070206 E12 0.3+ 0.4+ 750531 260 0.7- 0.1- 070126 423 0.9- 0.5- 070207 E12 0.1- 0.3- 750603 260 0.5- 0.9- 070127 H06 (0.7+ 2.2+) 070207 E12 0.3- 0.3- 1977/ 070127 H06 (2.2- 5.5+) 070211 372 0.1+ 0.2+ 770718 413 0.5- 1.3- 070128 147 0.7- 1.1+ 070212 349 0.2+ 0.4+ 770718 413 (3.4+ 1.5-) 070128 147 0.2+ 1.0+ 070212 372 1.0- 0.3+ 770719 413 1.4- 1.1+ 070128 147 0.8+ 0.2- 070212 349 0.2- 0.2+ 770719 413 1.6+ 0.5+ 070128 H36 0.0 0.6+ 070212 372 0.0 0.4+ 1996/ 070128 H36 0.1- 0.5+ 070214 423 0.7- 0.3+ 960226 260 0.3+ 0.4- 070128 H36 0.3+ 0.5- 070214 423 0.2- 0.2+ 2007/ 070129 808 0.4- 0.7- 070216 415 0.7+ 0.7- 070125 E12 0.6- 1.2+ 070129 808 1.0+ 0.1+ 070216 415 1.7+ 0.1- 070125 E12 0.5- 0.7+ 070129 E12 0.0 0.3+ 070217 673 0.5+ 0.6- 070125 E12 0.2- 0.6+ 070129 415 0.5+ 0.2- 070217 673 0.1+ 1.1- 070125 E12 0.5- 0.6+ 070129 415 0.5+ 0.4- 070217 423 0.4- 0.4+ 070126 808 0.0 0.1- 070129 E12 0.6- 0.1+ 070217 423 0.4- 0.6+ 070126 808 0.5+ 0.6- 070130 E12 0.2+ 0.0 070222 415 0.1+ 0.4- 070126 808 0.4+ 0.9- 070131 E12 0.2- 0.3+ 070222 415 0.3+ 0.3- 070126 808 0.6+ 0.6- 070131 E12 0.5- 0.5+ ( ) -------- Rejected Obs.

Director, Computing Section Syuichi Nakano 2007 Mar. 7

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