OAA computing section circular NK 1529 C/2007 O1 = 2006 GA38 (LINEAR)

The following improved orbital elements and the identification with 2006 GA38, by S. Nakano, are from 120 observations 2006 Apr. 2 to 2007 Aug. 6. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.68 arc second. See an orbit and remark on YC 2563. The comet has passed 2.59 AU from Jupiter on 2007 Jan. 15 UT. Epoch = 2007 May 20.0 TT T = 2007 June 3.30043 +/- 0.00300 (m.e.) TT Peri. = 159.40111 +/- 0.00077 Node = 116.23518 +/- 0.00004 (2000.0) Inc. = 24.37956 +/- 0.00007 q = 2.8767077 +/- 0.0000219 AU e = 1.0050087 +/- 0.0000332 1/a = -0.0017411 +/- 0.0000115 1/AU origin = +0.000006 (Q= 7) future = -0.000515 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2006/ 070717 B03 0.2- 0.1- 070719 A79 1.4+ 1.8- 060402 699 0.1- 0.6- 070717 B03 0.3- 0.6- 070719 A79 0.4+ 0.5+ 060402 699 1.5+ 0.5+ 070718 470 0.7+ 1.6- 070719 A79 (0.0 3.2+) 060402 699 0.1+ 0.0 070718 470 (3.0- 1.0+) 070720 673 0.8+ 0.7- 060402 699 0.5- 0.1- 070718 A55 0.9- 0.2- 070720 673 0.6+ 0.7- 060409 703 1.5+ 0.5+ 070718 A79 1.7- 0.1+ 070720 673 0.7+ 0.5- 060409 703 0.5+ 0.3+ 070718 A79 0.3- 0.2+ 070720 673 0.4+ 0.2- 060409 703 1.0- 0.5- 070718 A55 0.4+ 0.5+ 070720 J53 (0.3+ 2.2-) 060409 703 1.1- 1.0+ 070718 734 0.1+ 0.1+ 070720 J70 (2.4+ 4.9-) 060504 703 0.4- 0.7+ 070718 734 0.1+ 0.1- 070720 J70 1.3+ 0.5+ 060504 703 0.2- 1.0- 070718 734 0.1- 0.1- 070720 J53 0.7- 0.1+ 060504 703 0.2- 0.5- 070718 704 1.1- 0.4+ 070720 J70 (4.9- 3.8-) 060504 703 0.2- 0.5- 070718 704 1.6- 0.6- 070721 213 0.3- 0.2- 2007/ 070718 704 0.5+ 0.6+ 070721 213 0.3+ 0.2+ 070715 704 1.3- 0.6+ 070718 704 0.6- 0.7+ 070721 213 0.2+ 0.4+ 070715 704 (2.1- 1.0+) 070718 704 0.2- 1.0+ 070723 415 0.2+ 0.0 070715 704 1.2- 0.3- 070718 704 0.2- 0.2- 070723 415 0.8+ 0.4- 070715 704 0.7- 0.7+ 070718 704 0.7+ 0.4+ 070723 372 0.9+ 0.8- 070715 704 0.9- 0.9- 070718 704 0.8- 0.9- 070724 415 0.2+ 0.6+ 070716 704 0.1- 0.0 070718 704 0.2+ 0.3- 070724 415 0.1+ 0.3- 070716 704 0.2- 0.5+ 070718 673 0.8+ 0.6- 070727 673 0.3+ 0.5- 070716 704 1.0- 1.1+ 070718 673 0.7+ 0.6- 070727 673 0.1+ 0.6- 070717 704 (0.0 2.3+) 070718 673 0.6+ 0.6- 070727 673 0.4+ 0.5- 070717 704 0.6- 1.1+ 070718 673 0.7+ 0.5- 070801 204 0.4+ 0.4+ 070717 704 0.8- 1.3+ 070718 415 1.2+ 0.2+ 070802 850 1.0- 0.8+ 070717 704 0.2+ 0.5- 070718 415 0.2+ 0.4- 070802 850 0.8+ 1.1+ 070717 704 (0.7- 3.1+) 070718 213 0.3+ 0.2+ 070803 850 (8.3- 2.2-) 070717 704 1.0+ 0.7- 070718 213 0.5+ 0.2- 070803 850 (8.0- 2.2-) 070717 704 (0.6+ 2.4-) 070718 213 0.8+ 0.2- 070803 850 (7.5- 1.8-) 070717 704 0.4+ 0.4- 070718 J70 1.8+ 1.5- 070803 585 0.3+ 0.9- 070717 704 0.1+ 0.7+ 070718 J70 0.9+ 0.4- 070803 585 0.1- 1.4+ 070717 473 1.8- 0.6+ 070718 J70 0.7+ 0.3- 070803 585 0.2+ 0.4+ 070717 473 1.5- 1.7+ 070718 A32 1.1+ 0.6- 070803 585 0.8- 0.8- 070717 595 1.0- 0.4+ 070719 204 0.2+ 0.5- 070803 585 0.3- 0.5- 070717 473 0.7- 0.7+ 070719 204 0.6- 0.6+ 070804 147 0.2- 0.2- 070717 595 0.1- 0.8- 070719 850 1.2- 0.5+ 070804 147 0.6+ 0.1+ 070717 473 0.3- 0.1- 070719 704 0.2- 0.2+ 070804 147 0.4- 0.1- 070717 595 0.0 0.2+ 070719 850 (0.5- 3.9-) 070805 104 0.7- 0.2+ 070717 473 0.3- 0.7+ 070719 673 0.7+ 0.7- 070805 104 0.6- 0.0 070717 595 0.0 0.8+ 070719 673 0.6+ 0.6- 070805 215 (6.8+ 1.5+) 070717 473 1.0- 0.7+ 070719 673 0.6+ 0.3- 070805 215 (7.1+ 2.1+) 070717 595 1.1- 1.1+ 070719 850 0.0 0.1+ 070805 215 (6.3+ 2.0+) 070717 J95 0.5+ 0.2+ 070719 704 0.3- 0.9+ 070805 104 0.8- 0.7- 070717 B03 0.3- 0.7- 070719 673 0.8+ 0.5- 070806 J95 0.2- 0.5+ 070717 J95 0.4+ 0.1+ 070719 704 0.0 0.8+ 070806 J95 0.3+ 0.0 070717 B03 0.0 0.4- 070719 A79 1.0+ 0.1- 070806 J95 0.0 0.4+ ( ) -------- Rejected Obs.

Director, Computing Section Syuichi Nakano 2007 Aug. 13

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