OAA computing section circular NK 1661 C/1998 M1 (LINEAR)

The following improved orbital elements, by S. Nakano, are from 175 observations 1998 May 22 to 1999 Nov. 10. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.65 arc second. See orbits on MPC 32594, MPC 34733 and MPC 35553. Epoch = 1998 Nov. 3.0 TT T = 1998 Oct. 28.12181 +/- 0.00144 (m.e.) TT Peri. = 19.40567 +/- 0.00029 Node = 256.06757 +/- 0.00005 (2000.0) Inc. = 20.38478 +/- 0.00003 q = 3.1181262 +/- 0.0000080 AU e = 0.9927391 +/- 0.0000224 1/a = +0.0023286 +/- 0.0000072 1/AU origin = +0.002231 (Q= 7) future = +0.002887 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1998/ 980618 752 0.0 0.4- 980703 367 0.4- 0.3+ 980522 704 (0.2+ 5.8-) 980618 752 0.8+ 0.0 980703 367 0.3- 0.4+ 980522 704 0.4- 0.2- 980618 709 0.7+ 1.9- 980703 367 0.1+ 0.7+ 980522 704 (0.4- 2.6-) 980618 752 0.1+ 0.2+ 980714 422 0.2+ 1.0- 980522 704 (2.5- 2.0+) 980618 709 0.4+ 1.4- 980714 422 0.1- 0.6- 980616 704 (1.9+ 8.1-) 980618 752 0.0 0.8- 980714 422 0.3- 0.4- 980616 704 0.9- 0.6+ 980618 709 0.4+ 1.7- 980714 422 0.5- 0.3- 980616 704 0.1- 0.3- 980618 709 0.3- 0.3- 980714 422 0.5- 0.4- 980616 704 (2.3+ 1.5-) 980618 709 0.2+ 0.8- 980718 402 0.5- 0.2- 980616 704 (2.6- 1.5-) 980618 709 0.8+ 1.7- 980718 402 0.5- 0.5- 980616 557 1.3+ 0.0 980618 709 0.4+ 1.7- 980718 402 0.7- 0.1+ 980616 046 0.6- 0.7+ 980618 696 0.8- 1.1+ 980725 691 (2.0- 1.6+) 980616 046 0.3- 0.4+ 980618 696 0.8- 1.0+ 980725 691 0.1+ 0.8- 980616 046 0.1- 0.5+ 980618 696 0.8- 1.0+ 980725 691 (2.2- 1.8+) 980616 046 0.5- 0.2- 980618 422 0.3+ 0.1+ 980808 426 0.3- 0.7+ 980616 046 0.4- 0.2+ 980618 422 0.0 0.0 980808 426 0.4- 1.2+ 980616 557 0.2+ 0.2- 980618 422 0.2+ 0.1- 980808 426 0.0 0.8+ 980616 557 0.0 0.3+ 980618 422 0.3- 0.2- 980904 402 0.6- 0.1- 980616 557 0.1- 0.6+ 980618 402 0.1- 0.5+ 980904 402 1.4+ 0.6- 980616 046 0.1+ 0.8+ 980618 402 0.3- 0.4+ 980904 402 0.3+ 0.1+ 980616 046 0.3+ 0.8+ 980618 402 0.0 0.4+ 980909 046 0.4+ 0.3+ 980616 046 0.1- 0.6+ 980618 400 (0.5+ 3.0-) 980909 046 0.1+ 0.2+ 980617 752 0.4+ 0.4+ 980618 400 (0.5+ 2.9-) 980909 046 1.1- 0.9+ 980617 709 0.7+ 1.8- 980618 400 (1.0+ 2.8-) 980916 360 0.0 0.3+ 980617 709 0.7+ 1.4- 980619 709 0.1+ 0.5+ 980916 360 0.3- 0.7+ 980617 709 0.6+ 1.4- 980619 709 0.0 0.7- 980920 897 (4.5+ 1.0-) 980617 709 0.8+ 1.6- 980619 709 0.2- 0.6- 1999/ 980617 752 (0.2- 2.6-) 980619 709 0.4+ 0.9- 990513 360 0.1- 0.2+ 980617 709 0.1+ 1.0- 980619 709 0.1+ 0.8- 990513 360 0.2- 0.2+ 980617 752 0.3+ 0.9- 980619 696 0.6- 1.0+ 990513 360 0.2+ 0.4+ 980617 752 0.0 1.0- 980619 696 0.6- 1.1+ 990520 360 0.3- 0.1- 980617 752 0.2+ 1.2- 980619 620 (2.5+ 3.4-) 990520 360 0.1+ 0.0 980617 752 0.3+ 1.9- 980619 620 1.3+ 1.3- 990520 360 0.3+ 0.2+ 980617 696 0.6- 1.2+ 980619 620 1.3+ 0.2+ 990716 118 0.8- 0.1- 980617 696 0.5- 1.2+ 980620 402 0.1- 1.1+ 990716 118 1.6- 0.9- 980617 696 0.5- 1.1+ 980620 402 0.1- 0.6+ 990720 658 0.2+ 0.8+ 980617 422 0.0 0.1- 980620 402 0.0 0.6+ 990720 658 0.3- 0.9+ 980617 422 0.1+ 0.6- 980620 897 1.9+ 1.4- 990720 658 0.3- 1.1+ 980617 422 0.1+ 1.2- 980620 046 0.5- 0.3+ 990722 402 0.6+ 0.0 980617 422 0.1+ 0.2- 980620 046 0.2- 0.5+ 990722 402 0.6+ 0.1+ 980617 422 0.1- 0.5- 980620 046 0.3- 0.3+ 990722 402 0.7+ 0.3- 980617 422 0.2+ 0.1- 980620 046 0.0 0.4+ 990808 046 0.4- 1.2+ 980617 426 0.3- 0.3+ 980622 426 0.0 0.2+ 990808 046 0.1+ 0.4+ 980617 426 0.3- 0.5+ 980622 426 0.2+ 0.2+ 990808 046 0.2+ 0.8+ 980617 426 0.5- 0.6+ 980622 426 0.2+ 0.6+ 990808 046 0.0 0.3+ 980617 426 0.3- 0.6+ 980622 046 0.1- 0.6+ 990813 143 (0.4- 2.3-) 980617 402 0.4- 0.6+ 980622 046 0.8- 0.1+ 990813 143 0.4+ 1.5- 980617 402 0.1- 0.7+ 980622 046 0.0 0.7+ 990820 402 1.0+ 0.4+ 980617 402 0.4- 0.1+ 980623 752 0.1+ 0.6- 990820 402 0.3+ 0.2+ 980617 360 0.5- 1.4+ 980623 752 0.1- 0.1- 990820 402 0.6- 0.3- 980617 360 0.4- 1.0+ 980623 752 0.2+ 0.3- 990904 402 0.1+ 0.1- 980617 360 0.6- 1.2+ 980623 752 0.2+ 0.5- 990904 402 0.2- 0.1+ 980617 867 0.0 0.2+ 980623 860 0.5+ 0.7- 990904 402 0.3+ 0.2- 980617 867 0.0 0.1+ 980624 860 0.3- 1.1- 990913 557 0.6- 0.0 980617 867 0.0 0.7+ 980624 860 0.5+ 0.7- 990913 557 0.2- 0.6- 980617 557 0.3+ 0.3+ 980626 426 0.2- 0.7+ 990913 159 0.2- 0.6- 980617 557 0.2- 0.3+ 980626 426 0.1+ 0.2+ 990913 159 0.9- 0.9- 980617 557 0.1- 0.1+ 980626 426 0.2- 0.4- 990915 046 0.6- 0.1- 980617 046 0.0 0.8+ 980627 372 1.5+ 0.2- 990915 046 0.0 0.1+ 980617 046 0.1- 0.3+ 980628 844 0.1- 0.1+ 990915 046 0.3+ 0.1- 980617 557 0.1- 0.1+ 980628 844 0.8- 1.0+ 991110 360 0.7+ 0.8- 980617 046 0.3- 0.4+ 980628 844 1.0- 1.4+ 991110 360 1.3+ 0.4- 980617 046 0.2- 0.7+ 980629 897 (2.3- 0.6+) 991110 360 0.5+ 1.0- 980618 752 0.2- 0.8+ 980703 860 1.0+ 1.4- Un-included observations 980618 752 0.2+ 0.7- 980703 860 1.6+ 1.5- 990919 848 0.2- 0.7- 990919 848 0.3- 0.6- ( ) -------- Rejected Obs.

Director, Computing Section Late edition Syuichi Nakano 1999 Nov. 21

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