OAA computing section circular NK 863 C/1953 T1 (Abell)

The following improved orbital elements, by S. Nakano, are from 77 observations 1953 Oct. 16 to 1954 Sept. 15. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, and nongravitational effects were taken into account. The mean residual is +/- 1.02 arc seconds. Epoch = 1954 June 27.0 TT T = 1954 July 7.34914 +/- 0.00049 (m.e.) TT Peri. = 194.38264 +/- 0.00080 Node = 3.03261 +/- 0.00022 (2000.0) Inc. = 53.22887 +/- 0.00005 q = 0.9701174 +/- 0.0000101 AU e = 1.0005716 +/- 0.0000349 1/a = -0.0005892 +/- 0.0000360 1/AU origin = +0.000126 (Q= 6) future = -0.000886 A1 = +5.878 +/- 0.231 A2 = -0.14393 +/- 0.21562 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1953/ 540131 388 2.0- 0.2+ 540527 057 0.8+ 1.5+ 531016 675 1.6+ 0.8- 540201 024 0.5+ 1.0- 540530 754 1.6+ 1.0+ 531017 675 0.9+ 0.2+ 540203 662 0.8+ 0.1+ 540531 066 0.6+ 2.1+ 531018 675 0.6+ 0.4+ 540203 662 0.7+ 1.0- 540531 066 1.1- 2.6+ 531020 662 0.6+ 0.8- 540206 711 0.7- 0.8- 540601 006 1.0- 2.4- 531020 662 0.5+ 1.3- 540224 711 1.2- 0.2+ 540602 662 (2.9+ 0.0 ) 531026 754 0.1+ 0.0 540301 711 0.7- 0.1- 540602 662 2.4+ 0.0 531027 662 0.3+ 1.7+ 540304 662 0.2- 0.3+ 540604 377 0.9+ 0.6+ 531027 662 0.8+ 0.8+ 540304 662 0.5- 0.8+ 540620 006 0.4- 1.6+ 531029 754 0.3+ 0.3- 540316 754 0.0 0.2- 540621 662 0.2+ 0.7- 531029 056 1.0- 0.5- 540330 057 1.2+ 2.7+ 540621 662 0.4- 0.4- 531029 056 0.6- 0.5+ 540331 662 0.4+ 0.2- 540621 377 1.8- 2.0+ 531104 754 (2.7- 3.5+) 540331 662 0.7+ 0.4- 540622 006 (3.1+ 0.7+) 531107 056 0.5- 2.0- 540401 754 0.8+ 0.6+ 540622 822 1.7- 1.4- 531113 754 1.7- 0.6- 540405 057 0.7- 0.5- 540622 822 1.1- 0.5- 531116 754 0.1- 0.6+ 540408 057 1.0+ 0.6+ 540624 006 (3.8+ 1.0-) 531118 662 0.4- 0.2- 540410 045 1.4- 0.3+ 540624 822 0.7- 1.7- 531118 662 0.0 1.0- 540420 662 0.2+ 0.4- 540628 662 0.4- 0.7- 531128 662 0.5+ 1.9- 540420 662 0.0 0.9- 540628 662 0.3- 0.5- 531128 662 0.3+ 1.5- 540423 754 0.6+ 0.4+ 540719 081 1.3+ 1.5+ 531208 754 0.5+ 0.5- 540423 057 1.7- 0.7- 540724 081 1.0- 0.9- 531224 754 (4.5+ 0.8-) 540426 024 0.1+ 0.7- 540727 822 0.9+ 0.4+ 531229 754 0.3- 0.3+ 540502 754 1.2+ 0.5+ 540811 822 0.1- 0.9+ 1954/ 540502 377 1.5- 0.4+ 540820 822 1.6+ 0.1+ 540101 662 0.7+ 1.3+ 540507 057 0.5+ 1.1- 540827 822 1.0- 0.3- 540101 662 1.1+ 1.6+ 540520 662 0.3- 1.0- 540904 822 2.6+ 0.0 540123 754 0.3- 0.1- 540520 662 0.4- 0.6- 540906 822 0.0 0.4+ 540130 711 2.6- 0.4+ 540526 006 0.0 1.8- 540915 822 1.1- 1.1- ( ) -------- Rejected Obs.

Director, Computing Section Syuichi Nakano 2002 May 15

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