OAA computing section circular NK 749 C/1999 F2 (Dalcanton)

The following improved orbital elements, by S. Nakano, are from 119 observations 1998 June 18 to 2000 Aug. 29. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.76 arc second. Epoch = 1998 Aug. 15.0 TT T = 1998 Aug. 23.98662 +/- 0.00281 (m.e.) TT Peri. = 352.39328 +/- 0.00037 Node = 210.29593 +/- 0.00005 (2000.0) Inc. = 56.42104 +/- 0.00005 q = 4.7188015 +/- 0.0000160 AU e = 0.9986151 +/- 0.0000175 1/a = +0.0002935 +/- 0.0000037 1/AU origin = +0.000041 (Q= 8) future = +0.000344 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1998/ 990610 860 0.5- 1.0- 000314 402 0.3- 0.6- 980618 704 0.9- 0.7- 990611 372 0.7+ 1.2+ 000314 402 0.2- 0.8- 980618 704 1.5+ 1.3- 990611 867 0.3+ 1.0+ 000408 402 0.6- 1.4- 980618 704 0.8+ 1.1- 990611 867 0.4+ 1.0+ 000408 402 1.2+ 0.8+ 980618 704 0.5+ 0.2+ 990611 867 0.0 0.5+ 000408 402 0.2+ 0.6+ 1999/ 990611 620 0.1+ 0.8+ 000501 704 0.6+ 0.7+ 990223 704 1.9+ 0.2- 990612 367 0.2- 0.3+ 000501 704 1.4+ 1.6+ 990223 704 (3.2+ 2.0-) 990612 367 0.2- 0.3+ 000501 704 0.5+ 0.9- 990223 704 (0.2+ 3.5+) 990612 367 0.6- 0.0 000501 704 1.7- 0.3+ 990320 645 0.5- 0.7+ 990612 504 0.7- 0.6- 000501 867 0.6+ 1.0+ 990320 645 0.6- 0.6+ 990612 504 0.6- 0.3- 000501 867 0.7+ 0.2+ 990324 704 0.8+ 1.1- 990612 108 (4.4+ 0.9+) 000502 704 0.5- 0.9- 990324 704 0.2+ 0.7- 990612 108 (2.2+ 0.1+) 000502 704 1.5- 0.6- 990324 704 1.7+ 1.6+ 990614 402 0.5+ 0.0 000502 704 (2.2- 0.6+) 990324 704 (0.5- 2.4+) 990614 897 0.1- 0.8+ 000502 704 0.8+ 1.0+ 990328 699 1.0- 1.2- 990614 897 1.0+ 0.2+ 000502 704 0.6+ 0.1- 990328 699 0.6- 1.0- 990614 897 1.1+ 0.4+ 000503 704 0.1- 0.5+ 990328 699 0.4- 1.2- 990619 071 0.3+ 0.5- 000503 704 0.7+ 0.5- 990512 704 (2.8+ 3.7-) 990619 071 0.1- 0.8- 000503 704 1.4+ 0.1- 990512 704 0.9- 1.2- 990619 620 0.4- 0.5- 000505 699 (3.7- 4.0-) 990512 704 (2.3+ 1.8+) 990619 071 0.1+ 0.2- 000505 699 (3.1- 4.5-) 990607 046 0.9- 0.6+ 990619 071 0.0 0.3+ 000505 699 0.3- 0.4- 990607 046 0.7- 0.6+ 990619 620 0.7- 0.1- 000505 699 1.4- 1.5- 990607 046 0.2- 0.9+ 990619 620 0.6- 0.5+ 000527 699 (1.8- 3.1-) 990607 046 0.3+ 0.7+ 990630 108 0.7+ 0.7- 000527 699 0.1- 1.4- 990608 713 0.3- 0.7- 990701 118 1.0+ 0.7+ 000527 699 (0.0 2.5-) 990608 713 0.1+ 1.5+ 990701 118 0.9+ 0.4- 000527 699 (0.8- 2.3-) 990608 713 0.5+ 0.2- 990707 360 0.2- 0.7+ 000604 402 0.1- 0.0 990608 711 0.8- 0.2+ 990707 360 0.4- 0.3+ 000604 402 0.2- 0.7- 990608 711 0.3- 0.5+ 990806 046 0.7+ 1.3+ 000604 402 1.7- 0.4+ 990608 711 0.3- 0.2+ 990806 046 0.8- 0.6- 000606 699 (1.3- 2.6-) 990608 587 (2.9- 2.7-) 990806 046 0.6+ 0.9+ 000606 699 (0.9- 2.7-) 990608 587 0.0 0.7+ 990806 046 0.1+ 0.2- 000606 699 (0.6- 2.8-) 990608 108 0.2+ 1.6+ 990817 897 0.4+ 0.5- 000606 699 (2.4- 4.2-) 990608 108 (0.3- 2.4+) 990817 897 (0.4+ 2.3-) 000608 170 0.0 1.4+ 990608 108 0.4- 0.3+ 990831 402 0.1+ 0.5- 000608 046 0.4- 0.7+ 990608 108 0.8- 0.2+ 990831 402 0.0 0.4- 000608 046 0.8- 0.9+ 990608 620 0.4- 0.9- 990831 402 1.0+ 0.2- 000608 046 0.2+ 0.4+ 990608 620 0.1- 0.7- 991009 402 0.0 1.1- 000608 046 0.1- 0.5+ 990608 620 0.2+ 0.2- 991009 402 0.1+ 0.1+ 000628 402 0.4+ 1.2- 990609 402 0.1+ 0.1- 991009 402 0.2+ 1.0+ 000628 402 1.2+ 1.7- 990609 402 0.4- 0.7- 2000/ 000628 402 (1.3- 2.1-) 990609 402 0.1+ 0.1+ 000301 402 0.5- 0.9- 000706 699 (1.3- 2.5-) 990609 360 0.2- 0.4+ 000301 402 0.3+ 0.8- 000706 699 0.0 1.5- 990609 360 0.5- 0.2+ 000301 402 1.7+ 0.3- 000706 699 (1.1- 3.2-) 990609 360 0.4- 0.4+ 000313 360 0.4- 0.5+ 000706 699 (1.4- 3.3-) 990609 372 1.0- 1.9+ 000313 360 0.5- 0.1+ 000829 867 0.2- 0.9+ 990610 860 0.8- 1.0- 000313 360 0.1- 0.3+ 000829 867 1.6+ 1.3- 990610 860 0.3- 0.6- 000314 402 0.5- 1.0- ( ) -------- Rejected Obs.

Director, Computing Section Later edition Syuichi Nakano 2000 Sept. 11

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