OAA computing section circular NK 569R 54P/de Vico-Swift

The following improved orbital elements, by S. Nakano, are from 18 observations 1894-1965 (See NK 569 for original computations). Perturbations by Mercury to Neptune and five minor planets, Ceres, Pallas, Vesta, Iris and Bamberga were taken into account. The mean residual is +/- 2.02 arc seconds. Epoch = 1965 Aug. 28.0 TT T = 1965 Aug. 23.27487 +/- 0.00103 (m.e.) TT Peri. = 325.42636 +/- 0.00246 Node = 25.06885 +/- 0.00210 (2000.0) Inc. = 3.61282 +/- 0.00026 q = 1.6244459 +/- 0.0000139 AU e = 0.5244330 +/- 0.0000035 a = 3.4158088 +/- 0.0000066 AU n' = 0.15612187 +/- 0.00000045 P = 6.313 +/- 0.0000183 years T = 1894 Oct. 12.62646 TT Epoch = 1894 Oct. 19.0 TT Peri. = 296.77988 e = 0.5719215 Node = 49.96805 (2000.0) a = 3.2508015 AU Inc. = 2.97495 n'= 0.16815833 q = 1.3915983 AU P = 5.861 years [ T = 1901 Feb. 15.97924 TT Epoch = 1901 Feb. 25.0 TT Peri. = 324.10741 e = 0.5157855 Node = 26.16620 (2000.0) a = 3.4479533 AU Inc. = 3.59250 n'= 0.15394373 q = 1.6695489 AU P = 6.402 years ] [ T = 1907 July 18.53034 TT Epoch = 1907 July 4.0 TT Peri. = 324.24012 e = 0.5152143 Node = 26.12010 (2000.0) a = 3.4518029 AU Inc. = 3.59005 n'= 0.15368627 q = 1.6733847 AU P = 6.413 years ] [ T = 1913 Dec. 26.12414 TT Epoch = 1913 Dec. 19.0 TT Peri. = 324.33026 e = 0.5092230 Node = 25.99616 (2000.0) a = 3.4730435 AU Inc. = 3.57874 n'= 0.15227855 q = 1.7044900 AU P = 6.472 years ] [ T = 1920 June 20.96771 TT Epoch = 1920 June 5.0 TT Peri. = 324.37640 e = 0.5080036 Node = 25.97724 (2000.0) a = 3.4806366 AU Inc. = 3.57495 n'= 0.15178053 q = 1.7124606 AU P = 6.494 years ] [ T = 1926 Dec. 15.32483 TT Epoch = 1926 Dec. 31.0 TT Peri. = 324.24447 e = 0.5077764 Node = 25.96704 (2000.0) a = 3.4815310 AU Inc. = 3.57435 n'= 0.15172204 q = 1.7136919 AU P = 6.496 years ] [ T = 1933 June 14.71303 TT Epoch = 1933 June 17.0 TT Peri. = 324.16358 e = 0.5064029 Node = 25.99743 (2000.0) a = 3.4871977 AU Inc. = 3.57125 n'= 0.15135237 q = 1.7212708 AU P = 6.512 years ] [ T = 1939 Dec. 14.96756 TT Epoch = 1939 Dec. 3.0 TT Peri. = 324.19132 e = 0.5080126 Node = 25.95675 (2000.0) a = 3.4812436 AU Inc. = 3.57531 n'= 0.15174083 q = 1.7127279 AU P = 6.495 years ] [ T = 1946 June 6.60208 TT Epoch = 1946 May 20.0 TT Peri. = 324.06138 e = 0.5088152 Node = 25.93894 (2000.0) a = 3.4758732 AU Inc. = 3.57699 n'= 0.15209264 q = 1.7072960 AU P = 6.480 years ] [ T = 1952 Nov. 27.90278 TT Epoch = 1952 Dec. 14.0 TT Peri. = 324.27279 e = 0.5104679 Node = 25.84861 (2000.0) a = 3.4690288 AU Inc. = 3.58100 n'= 0.15254297 q = 1.6982010 AU P = 6.461 years ] [ T = 1959 Apr. 26.52854 TT Epoch = 1959 Apr. 22.0 TT Peri. = 325.25994 e = 0.5237821 Node = 25.14273 (2000.0) a = 3.4188242 AU Inc. = 3.61164 n'= 0.15591537 q = 1.6281053 AU P = 6.321 years ] T = 1965 Aug. 23.27487 TT Epoch = 1965 Aug. 28.0 TT Peri. = 325.42636 e = 0.5244330 Node = 25.06885 (2000.0) a = 3.4158088 AU Inc. = 3.61282 n'= 0.15612187 q = 1.6244459 AU P = 6.313 years [ T = 1973 Feb. 15.24512 TT Epoch = 1973 Feb. 7.0 TT Peri. = 1.85324 e = 0.4250982 Node = 359.30952 (2000.0) a = 3.7914808 AU Inc. = 6.09673 n'= 0.13350293 q = 2.1797291 AU P = 7.383 years ] [ T = 1980 July 12.46104 TT Epoch = 1980 July 20.0 TT Peri. = 1.93996 e = 0.4238980 Node = 359.26260 (2000.0) a = 3.8027203 AU Inc. = 6.08834 n'= 0.13291148 q = 2.1907546 AU P = 7.416 years ] [ T = 1987 Dec. 4.90127 TT Epoch = 1987 Nov. 21.0 TT Peri. = 1.89419 e = 0.4252820 Node = 359.24572 (2000.0) a = 3.7952896 AU Inc. = 6.09251 n'= 0.13330201 q = 2.1812211 AU P = 7.394 years ] [ T = 1995 Apr. 9.46602 TT Epoch = 1995 Mar. 24.0 TT Peri. = 1.92895 e = 0.4306808 Node = 359.01752 (2000.0) a = 3.7684474 AU Inc. = 6.09606 n'= 0.13472879 q = 2.1454496 P = 7.315 years ] The predicted orbit for the 2002 return is as follows: T = 2002 Aug. 7.45237 TT Epoch = 2002 July 25.0 TT Peri. = 2.13738 e = 0.4305653 Node = 358.93239 (2000.0) a = 3.7687426 AU Inc. = 6.09250 n'= 0.13471295 q = 2.1460530 AU P = 7.316 years The following residuals in seconds of arc are from the above orbital elements: 1894/ 1965/ 650902 689 1.6+ 1.4+ 941123 020 5.1+ 0.4- 650804 689 0.0 0.4- 650902 689 1.5+ 1.4+ 941202 546 0.6+ 1.9- 650804 693 2.2- 0.8- 650925 689 0.8+ 1.8+ 941216 020 4.3- 0.5- 650804 689 1.2- 0.3- 650925 689 0.9+ 1.6+ 941228 020 1.3+ 3.1- 650806 689 0.7- 1.0- 651015 689 2.3- 1.3+ 1895/ 650806 689 1.5- 0.9- 651015 689 2.2- 1.3+ 950126 662 1.2+ 6.4- 650825 689 0.1+ 1.3+ 950130 662 (3.7- 9.0-) 650825 689 0.2- 1.5+ ( ) -------- Rejected Obs.

Director, Computing Section Syuichi Nakano 1999 Oct. 31

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