OAA computing section circular NK 1412 184P/Lovas (1986 W1 = 2007 A1) [Temporary numbered]

The following improved orbital elements, by S. Nakano, are from 44 observations 1986 to 2007. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.94 arc second. See orbits in NK 650 and NK 946 (= HICQ 2006). Epoch = 2006 Dec. 11.0 TT T = 2006 Dec. 12.45483 +/- 0.00354 (m.e.) TT Peri. = 77.40258 +/- 0.00306 Node = 278.30558 +/- 0.00450 (2000.0) Inc. = 1.55312 +/- 0.00008 q = 1.3953845 +/- 0.0000584 AU e = 0.6040966 +/- 0.0000150 a = 3.5245583 +/- 0.0000564 AU n' = 0.14895224 +/- 0.00000358 P = 6.617 +/- 0.0001588 years (+/- 0.06 day) T = 1986 Sept. 2.25781 TT Epoch = 1986 Sept. 7.0 TT Peri. = 71.41003 e = 0.5927489 Node = 283.74764 (2000.0) a = 3.5821412 AU Inc. = 1.52950 n'= 0.14537510 q = 1.4588310 AU P = 6.780 years [ T = 1993 June 12.99140 TT Epoch = 1993 June 22.0 TT Peri. = 71.46383 e = 0.5919154 Node = 283.67856 (2000.0) a = 3.5861552 AU Inc. = 1.52803 n'= 0.14513109 q = 1.4634546 AU P = 6.791 years ] [ T = 2000 Mar. 24.89917 TT Epoch = 2000 Apr. 6.0 TT Peri. = 71.63114 e = 0.5933361 Node = 283.55251 (2000.0) a = 3.5772979 AU Inc. = 1.52986 n'= 0.14567043 q = 1.4547580 AU P = 6.766 years ] The predicted orbit for the 2013 return is as follows: T = 2013 July 28.49609 TT Epoch = 2013 Aug. 16.0 TT Peri. = 78.07768 e = 0.6042194 Node = 277.73343 (2000.0) a = 3.5223761 AU Inc. = 1.55149 n'= 0.14909068 q = 1.3940880 AU P = 6.611 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1986/ 861204 892 2.4+ 0.4+ 870303 691 0.2+ 0.6+ 861130 561(13.1- 6.7+) 861204 372(11.7+ 1.5+)Y 2007/ 861130 561 (5.8- 3.3+) 861205 801 0.5+ 2.3- 070109 703 1.4+ 1.1+ 861202 801 (3.5- 10.2+) 861205 373 2.0- 2.5+ 070109 703 (2.6+ 0.7+) 861202 691 0.4- 0.5+ 861205 373 (3.2- 2.5-) 070109 703 (2.5+ 0.2+) 861202 691 0.0 0.8+ 861205 399 1.9- 2.1- 070109 703 0.6+ 0.7- 861202 691 0.2- 0.2- 861206 399 1.6+ 0.7+ 070109 G96 0.2+ 0.2- 861202 892(11.7- 4.9-)Y 861207 372 1.2- 2.2+ Y 070109 G96 0.3- 0.2- 861202 892(11.7- 6.9-)Y 1987/ 070109 G96 0.1- 0.5- 861203 372 1.0+ 1.8- 870103 691 (3.8+ 1.6-) 070109 G96 0.5- 0.0 861203 323 0.0 0.2- 870103 691 0.4+ 0.5+ 070110 G96 0.6- 0.3+ 861203 372 0.2- 0.4- 870103 691 0.6+ 1.2- 070110 G96 0.0 0.0 861203 561 (8.3- 7.9+) 870125 691 0.2+ 0.8- 070110 G96 0.5+ 0.4+ 861204 688 0.0 2.1- 870125 691 0.2+ 1.3+ 070110 734 0.2+ 0.1+ 861204 688 (4.1+ 5.9-) 870125 691 0.0 0.4- 070110 734 0.4- 0.4- 861204 688 (5.6+ 3.4+) 870130 691 0.2+ 0.1- 070110 734 0.5- 1.4- 861204 688 1.5+ 0.1- 870130 691 0.2- 0.4- 070110 854 0.9- 0.5+ 861204 691 0.4- 1.3+ 870130 691 0.7- 0.6- 070110 854 0.5- 0.8+ 861204 691 1.4- 1.0+ 870301 691 0.3- 0.1- 070110 854 0.6+ 0.5+ 861204 691 0.3+ 0.5+ 870301 691 0.3- 1.7+ 861204 892 (0.8+ 2.9-) 870303 691 0.2+ 0.8- ( ) -------- Rejected Obs.

Director, Computing Section Syuichi Nakano 2007 Jan. 11

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