OAA computing section circular NK 1672 P/2007 H3 (Garradd)
The following improved orbital elements, by S. Nakano, are from 76 observations 2007 Mar. 28 to Sept. 23. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.48 arc second. See an orbit on YC 2553. Epoch = 2007 Aug. 8.0 TT T = 2007 Aug. 15.32823 +/- 0.00059 (m.e.) TT Peri. = 350.14716 +/- 0.00035 Node = 263.65824 +/- 0.00019 (2000.0) Inc. = 25.21559 +/- 0.00011 q = 1.8292851 +/- 0.0000046 AU e = 0.4775484 +/- 0.0000099 a = 3.5013482 +/- 0.0000191 AU n' = 0.15043577 +/- 0.00000123 P = 6.552 +/- 0.0000535 years The predicted orbit for the 2014 return is as follows: T = 2014 Mar. 1.23322 TT Epoch = 2014 Mar. 4.0 TT Peri. = 350.02804 e = 0.4772999 Node = 263.67718 (2000.0) a = 3.5024425 AU Inc. = 25.20445 n'= 0.15036528 q = 1.8307272 AU P = 6.555 years Possible identification: " " O644QLB 2001 06 30.43302 22 07 05.94 +19 10 03.7 (60.9+ 30.7+) 644/Pl O644QLB 2001 06 30.44355 22 07 05.83 +19 10 13.7 (61.3+ 30.7+) 644/Pl O644QLB 2001 06 30.45410 22 07 05.66 +19 10 23.5 (60.8+ 30.4+) 644/Pl The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2007/ 070428 673 0.2- 0.4- 070519 213 0.1+ 0.1- 070328 E12 0.7- 0.4+ 070428 673 0.3- 0.6- 070520 E12 0.4+ 0.8+ 070328 E12 0.6- 0.6- 070428 673 0.1- 0.5- 070520 E12 0.7+ 1.1+ 070328 E12 0.5- 1.0- 070505 415 0.2- 0.6- 070520 E12 0.1- 0.2+ 070328 E12 0.1+ 0.3- 070505 415 0.3- 1.1- 070524 415 0.1- 0.9- 070422 E12 0.2- 0.5- 070507 372 0.2+ 0.2+ 070524 415 0.6+ 0.5- 070422 E12 0.1+ 1.2+ 070507 372 0.7+ 0.2+ 070605 415 0.4- 0.1- 070422 E12 0.1+ 1.6+ 070509 F85 0.4+ 0.2+ 070605 415 0.6- 0.1+ 070422 E12 0.3- 1.7+ 070509 F85 0.3+ 0.2+ 070606 415 1.0+ 0.2- 070422 E12 0.1+ 0.3- 070509 F85 0.3+ 0.2+ 070606 415 0.2+ 0.1+ 070422 E12 0.0 0.5+ 070510 415 0.5+ 0.4+ 070611 474 0.3- 0.1+ 070422 E12 0.2+ 0.3+ 070510 415 0.4+ 0.2+ 070611 474 0.1- 0.1+ 070422 E12 0.0 0.6+ 070510 423 0.1+ 0.1+ 070611 474 0.1+ 0.2+ 070423 F85 0.1+ 0.9- 070510 423 0.3+ 0.3- 070612 415 0.6- 0.5- 070423 F85 0.3- 0.2- 070511 423 0.4+ 1.0+ 070612 415 0.2- 0.1- 070423 F85 0.1+ 0.8- 070511 423 0.2+ 0.6+ 070616 E12 0.1+ 0.0 070423 428 0.4+ 1.0+ 070511 415 0.0 0.8- 070714 415 0.6- 0.0 070423 428 0.7- 0.2+ 070511 415 0.0 0.2- 070714 415 0.9- 0.3- 070423 428 0.0 0.2- 070511 E12 0.1+ 0.1+ 070722 415 0.5- 0.8+ 070423 428 0.0 0.4- 070511 E12 0.0 0.1+ 070722 415 1.0- 0.2- 070423 E12 0.1- 0.2- 070512 415 0.2+ 0.4- 070807 474 0.0 0.1+ 070427 673 0.4- 0.8- 070512 415 0.0 0.4- 070807 474 0.0 0.2+ 070427 673 0.3- 0.7- 070514 423 0.2+ 0.8+ 070807 474 0.0 0.3+ 070427 673 0.6- 0.9- 070514 423 0.2+ 0.3+ 070808 E12 0.2+ 0.0 070427 673 0.6- 0.8- 070519 213 0.0 0.1+ 070923 215 1.6+ 1.4- 070428 673 0.0 0.7- 070519 213 0.0 0.0 ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2008 Sept. 6