Nakano Note (Nakano wa Kangaeru noda) NK 2075 80P/Peters-Hartley
The following improved orbital elements, by S. Nakano, are from 44 observations 1846 to 1990, including planetary perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas, Vesta, and non-gravitational effect of style II. The weighting mean residual is +/- 1.27 arc seconds. See the previous orbits in NK 503, NK 550, NK 940 (= MPC 48383) and also mentions on IAUC 3715 The 1846 observations have been made from Buckley orbit on JBAA 89, 256 (Marsden's Comet Catalog 4th edition). Epoch = 1990 July 8.0 TT T = 1990 June 23.63939 +/- 0.00355 (m.e.) TT Peri. = 338.30237 +/- 0.00130 Node = 260.10395 +/- 0.00018 (2000.0) Inc. = 29.83404 +/- 0.00017 q = 1.6257799 +/- 0.0000071 AU e = 0.5979130 +/- 0.0000022 a = 4.0433538 +/- 0.0000070 AU n' = 0.12122479 +/- 0.00000032 P = 8.130 +/- 0.0000212 years A1 = +0.688 +/- 0.206 A2 = -0.06871 +/- 0.00134 T = 1846 June 2.67391 TT Epoch = 1846 May 24.0 TT Peri. = 340.23383 e = 0.6223582 Node = 263.38952 (2000.0) a = 3.9635251 AU Inc. = 28.98151 n'= 0.12490553 q = 1.4967928 AU P = 7.891 years [ T = 1854 Apr. 15.93892 TT Epoch = 1854 Apr. 12.0 TT Peri. = 340.26321 e = 0.6237846 Node = 263.33777 (2000.0) a = 3.9511890 AU Inc. = 29.05342 n'= 0.12549094 q = 1.4864981 AU P = 7.854 years ] [ T = 1862 Feb. 1.83180 TT Epoch = 1862 Jan. 20.0 TT Peri. = 339.23757 e = 0.6186954 Node = 262.96665 (2000.0) a = 3.9752501 AU Inc. = 29.06025 n'= 0.12435332 q = 1.5157812 AU P = 7.926 years ] [ T = 1870 Jan. 13.12726 TT Epoch = 1870 Jan. 18.0 TT Peri. = 339.29848 e = 0.6175973 Node = 262.91262 (2000.0) a = 3.9861396 AU Inc. = 29.02626 n'= 0.12384410 q = 1.5243105 AU P = 7.958 years ] [ T = 1877 Dec. 21.75024 TT Epoch = 1877 Dec. 7.0 TT Peri. = 339.32643 e = 0.6186550 Node = 262.87200 (2000.0) a = 3.9739658 AU Inc. = 29.08480 n'= 0.12441361 q = 1.5154519 AU P = 7.922 years ] [ T = 1885 Nov. 4.44258 TT Epoch = 1885 Oct. 26.0 TT Peri. = 338.42719 e = 0.6144387 Node = 262.46695 (2000.0) a = 3.9945957 AU Inc. = 29.16137 n'= 0.12345106 q = 1.5401616 AU P = 7.984 years ] [ T = 1893 Nov. 5.35613 TT Epoch = 1893 Oct. 24.0 TT Peri. = 338.46043 e = 0.6133253 Node = 262.41983 (2000.0) a = 4.0061878 AU Inc. = 29.12341 n'= 0.12291563 q = 1.5490914 AU P = 8.019 years ] [ T = 1901 Nov. 6.38529 TT Epoch = 1901 Oct. 23.0 TT Peri. = 338.51463 e = 0.6145045 Node = 262.36645 (2000.0) a = 3.9934561 AU Inc. = 29.18811 n'= 0.12350391 q = 1.5394595 AU P = 7.980 years ] [ T = 1909 Oct. 11.07313 TT Epoch = 1909 Oct. 21.0 TT Peri. = 337.74884 e = 0.6101380 Node = 261.96618 (2000.0) a = 4.0083913 AU Inc. = 29.29498 n'= 0.12281429 q = 1.5627193 AU P = 8.025 years ] [ T = 1917 Oct. 30.45576 TT Epoch = 1917 Oct. 19.0 TT Peri. = 337.85982 e = 0.6077582 Node = 261.90212 (2000.0) a = 4.0234012 AU Inc. = 29.25754 n'= 0.12212767 q = 1.5781460 AU P = 8.070 years ] [ T = 1925 Nov. 18.85843 TT Epoch = 1925 Nov. 26.0 TT Peri. = 337.92037 e = 0.6090641 Node = 261.83324 (2000.0) a = 4.0105608 AU Inc. = 29.32402 n'= 0.12271465 q = 1.5678722 AU P = 8.032 years ] [ T = 1933 Nov. 12.67073 TT Epoch = 1933 Nov. 24.0 TT Peri. = 337.50281 e = 0.6052586 Node = 261.33131 (2000.0) a = 4.0177754 AU Inc. = 29.49468 n'= 0.12238427 q = 1.5859823 AU P = 8.053 years ] [ T = 1941 Dec. 8.67037 TT Epoch = 1941 Nov. 22.0 TT Peri. = 337.51570 e = 0.6040856 Node = 261.31682 (2000.0) a = 4.0309739 AU Inc. = 29.45145 n'= 0.12178368 q = 1.5959207 AU P = 8.093 years ] [ T = 1950 Jan. 7.64479 TT Epoch = 1949 Dec. 30.0 TT Peri. = 337.58144 e = 0.6048005 Node = 261.23816 (2000.0) a = 4.0205429 AU Inc. = 29.49906 n'= 0.12225793 q = 1.5889165 AU P = 8.062 years ] [ T = 1958 Jan. 19.52822 TT Epoch = 1958 Feb. 6.0 TT Peri. = 337.62928 e = 0.6013662 Node = 260.61575 (2000.0) a = 4.0270547 AU Inc. = 29.69390 n'= 0.12196151 q = 1.6053203 AU P = 8.081 years ] [ T = 1966 Feb. 23.65807 TT Epoch = 1966 Feb. 4.0 TT Peri. = 337.64947 e = 0.6000649 Node = 260.63913 (2000.0) a = 4.0388236 AU Inc. = 29.64519 n'= 0.12142881 q = 1.6152673 AU P = 8.117 years ] [ T = 1974 Apr. 5.96572 TT Epoch = 1974 Apr. 23.0 TT Peri. = 337.83873 e = 0.6012163 Node = 260.50156 (2000.0) a = 4.0287472 AU Inc. = 29.73493 n'= 0.12188466 q = 1.6065989 AU P = 8.086 years ] T = 1982 May 8.57204 TT Epoch = 1982 Apr. 21.0 TT Peri. = 338.18854 e = 0.5983719 Node = 260.05973 (2000.0) a = 4.0400911 AU Inc. = 29.85458 n'= 0.12137167 q = 1.6226142 AU P = 8.121 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1846/ 820715 474 1.3- 0.7- 900529 413 1.1- 0.6- 460626 500 72.5- 36.5- Y 820716 707 1.0- 1.0+ 900611 372 1.7- 1.0- 460628 500 30.7- 35.5- Y 820716 474 1.1- 0.4- 900615 413 0.5+ 0.9+ 460630 500 2.8+ 33.6- Y 820716 474 0.2+ 1.5- 900625 675 (7.1+ 3.0+) 460702 500 28.6+ 31.7- Y 820717 707 1.3- 0.4- 900625 675 1.9+ 0.1+ 460704 500 45.4+ 28.3- Y 820719 413 2.5+ 2.9+ 900626 675 2.5+ 1.7- 460706 500 54.7+ 24.5- Y 820720 323 (1.7+ 4.5+) 900627 372 1.5- 0.3- 460708 500 57.3+ 19.6- Y 820721 372 (5.2+ 3.6+) 900719 372 0.7- 1.0- 460710 500 53.7+ 14.2- Y 820722 474 2.6+ 1.2- 900720 474 (5.1+ 1.3+) 460712 500 43.2+ 7.8- Y 820722 474 (0.1- 6.0+) 900720 474 (6.7+ 1.6+) 460714 500 26.3+ 0.4- Y 820723 801 0.1- 0.6+ 1998/ 460716 500 3.9+ 8.2+ Y 820723 707 0.1+ 0.2- Not included in linkage 460718 500 23.5- 17.6+ Y 820723 474 1.4+ 0.3- 980216 568 (9.7+ 8.8-) 460719 500 39.0- 22.2+ Y 820723 474 1.4- 0.9+ 980216 568 (9.0+ 9.2-) 460720 500 56.3- 27.8+ Y 820724 474 2.2- 0.6+ 980217 568 (9.3+ 8.7-) 460721 500 74.4- 33.2+ Y 820724 474 1.3- 1.0+ 980217 568 (9.0+ 9.2-) 1982/ 820725 801 0.4+ 0.1- 980218 568(10.5+ 9.0-) 820711 413 0.9- 0.9+ 820812 675 1.4- 0.8- 980218 568(10.1+ 8.9-) 820713 323 (1.3- 6.3+) 820814 675 0.8- 1.5- 980425 426 (8.5+ 11.4-) 820714 323 0.9+ 1.2- 820819 801 1.7+ 0.8+ 980425 426 (8.3+ 10.7-) 820715 688 (3.8+ 2.6+) 820911 675 0.9+ 0.7- 980425 426 (7.9+ 10.7-) 820715 688 (7.7+ 2.9+) 1990/ 820715 474 1.9+ 1.2+ 900526 413 0.6+ 2.1+ ( ) -------- Rejected Obs.
Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2011 May 6