OAA computing section circular NK 919 D/1783 W1 (Pigott) = P/2003 A1
The following improved orbital elements, by S. Nakano, are from 89 observations 1783 - 2003 except 55 observations which were made at the near 2003 perihelion (Jan. 15 - Feb. 10) and also 1783 observations were made from a published orbit, including planetary perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas, Vesta, and non-gravitational effect of style II. Comet has made 33 revolutions during 1783 - 2003. The weighting mean residual is +/- 2.21 arc seconds. Note, To confirm the identification of D/1783 W1 and P/2003 A1, former two linked orbits are better than this linkage. One is gravitational solution (OAA/CS EMES published on 2003 Jan. 18) and another one is non-gravitational solution (OAA/CS EMES published on Jan. 29). These orbits can be seen at http://www.oaa.gr.jp/~muramatu/ comet/p2003a1.htm, but in Japanese. Epoch = 2003 Feb. 10.0 TT T = 2003 Feb. 1.51752 +/- 0.00714 (m.e.) TT Peri. = 357.20541 +/- 0.00314 Node = 55.24721 +/- 0.00016 (2000.0) Inc. = 46.25759 +/- 0.00038 q = 1.9124233 +/- 0.0000105 AU e = 0.4722338 +/- 0.0000487 a = 3.6236187 +/- 0.0000925 AU n' = 0.14288622 +/- 0.00000547 P = 6.898 +/- 0.0002642 years A1 = -4.181 +/- 0.289 A2 = +1.30861 +/- 0.07877 (+/- 0.10 day) T = 1783 Nov. 15.62169 TT Epoch = 1783 Nov. 10.0 TT Peri. = 351.66631 e = 0.5639567 Node = 58.15276 (2000.0) a = 3.3835256 AU Inc. = 46.24732 n'= 0.15836160 q = 1.4753635 AU P = 6.224 years [ T = 1790 Feb. 7.53766 TT Epoch = 1790 Feb. 6.0 TT Peri. = 351.80753 e = 0.5640373 Node = 58.09632 (2000.0) a = 3.3850180 AU Inc. = 46.25131 n'= 0.15825688 q = 1.4757416 AU P = 6.228 years ] [ T = 1796 June 13.42077 TT Epoch = 1796 June 14.0 TT Peri. = 352.28201 e = 0.5284999 Node = 57.52297 (2000.0) a = 3.4682207 AU Inc. = 46.19528 n'= 0.15259629 q = 1.6352664 AU P = 6.459 years ] [ T = 1802 Dec. 4.50683 TT Epoch = 1802 Dec. 1.0 TT Peri. = 352.42261 e = 0.5278925 Node = 57.47811 (2000.0) a = 3.4739568 AU Inc. = 46.15987 n'= 0.15221851 q = 1.6400810 AU P = 6.475 years ] [ T = 1809 May 31.57371 TT Epoch = 1809 May 18.0 TT Peri. = 352.50836 e = 0.5243468 Node = 57.43409 (2000.0) a = 3.4878263 AU Inc. = 46.10806 n'= 0.15131146 q = 1.6589957 AU P = 6.514 years ] [ T = 1815 Dec. 9.48904 TT Epoch = 1815 Dec. 13.0 TT Peri. = 352.57381 e = 0.5232219 Node = 57.42148 (2000.0) a = 3.4954471 AU Inc. = 46.04785 n'= 0.15081689 q = 1.6665526 AU P = 6.535 years ] [ T = 1822 June 18.67613 TT Epoch = 1822 May 30.0 TT Peri. = 352.52765 e = 0.5237480 Node = 57.43511 (2000.0) a = 3.4941135 AU Inc. = 46.08553 n'= 0.15090324 q = 1.6640785 AU P = 6.531 years ] [ T = 1828 Dec. 28.81530 TT Epoch = 1828 Dec. 24.0 TT Peri. = 352.48315 e = 0.5230691 Node = 57.45242 (2000.0) a = 3.4983789 AU Inc. = 46.04438 n'= 0.15062734 q = 1.6684851 AU P = 6.543 years ] [ T = 1835 July 11.68591 TT Epoch = 1835 July 21.0 TT Peri. = 352.51659 e = 0.5243329 Node = 57.43116 (2000.0) a = 3.4922784 AU Inc. = 46.10747 n'= 0.15102220 q = 1.6611619 AU P = 6.526 years ] [ T = 1842 Jan. 14.77152 TT Epoch = 1842 Jan. 5.0 TT Peri. = 352.55675 e = 0.5258998 Node = 57.42549 (2000.0) a = 3.4869770 AU Inc. = 46.14691 n'= 0.15136674 q = 1.6531764 AU P = 6.511 years ] [ T = 1848 July 19.70582 TT Epoch = 1848 Aug. 1.0 TT Peri. = 352.67831 e = 0.5267000 Node = 57.37051 (2000.0) a = 3.4832338 AU Inc. = 46.18766 n'= 0.15161080 q = 1.6486145 AU P = 6.501 years ] [ T = 1855 Jan. 3.63938 TT Epoch = 1855 Jan. 17.0 TT Peri. = 353.74309 e = 0.5434762 Node = 57.06749 (2000.0) a = 3.4325252 AU Inc. = 46.46908 n'= 0.15498279 q = 1.5670293 AU P = 6.359 years ] [ T = 1861 May 17.45896 TT Epoch = 1861 May 25.0 TT Peri. = 353.89414 e = 0.5434176 Node = 57.01043 (2000.0) a = 3.4340392 AU Inc. = 46.46474 n'= 0.15488031 q = 1.5679219 AU P = 6.364 years ] [ T = 1867 Nov. 3.22685 TT Epoch = 1867 Nov. 10.0 TT Peri. = 354.48067 e = 0.5172482 Node = 56.55840 (2000.0) a = 3.5011856 AU Inc. = 46.33518 n'= 0.15044625 q = 1.6902036 AU P = 6.551 years ] [ T = 1874 May 28.23281 TT Epoch = 1874 June 6.0 TT Peri. = 354.62060 e = 0.5164085 Node = 56.51556 (2000.0) a = 3.5074816 AU Inc. = 46.28811 n'= 0.15004135 q = 1.6961881 AU P = 6.569 years ] [ T = 1880 Dec. 23.06690 TT Epoch = 1880 Dec. 31.0 TT Peri. = 354.61545 e = 0.5145918 Node = 56.51167 (2000.0) a = 3.5163301 AU Inc. = 46.25877 n'= 0.14947536 q = 1.7068553 AU P = 6.594 years ] [ T = 1887 July 30.94890 TT Epoch = 1887 July 28.0 TT Peri. = 354.65056 e = 0.5134619 Node = 56.50984 (2000.0) a = 3.5229352 AU Inc. = 46.20332 n'= 0.14905519 q = 1.7140422 AU P = 6.612 years ] [ T = 1894 Mar. 6.41135 TT Epoch = 1894 Feb. 21.0 TT Peri. = 354.61922 e = 0.5144705 Node = 56.51585 (2000.0) a = 3.5186594 AU Inc. = 46.25555 n'= 0.14932696 q = 1.7084129 AU P = 6.600 years ] [ T = 1900 Oct. 10.13161 TT Epoch = 1900 Oct. 28.0 TT Peri. = 354.58396 e = 0.5144890 Node = 56.52958 (2000.0) a = 3.5202511 AU Inc. = 46.23549 n'= 0.14922569 q = 1.7091206 AU P = 6.605 years ] [ T = 1907 May 16.76432 TT Epoch = 1907 May 25.0 TT Peri. = 354.66811 e = 0.5155451 Node = 56.48949 (2000.0) a = 3.5139353 AU Inc. = 46.29027 n'= 0.14962820 q = 1.7023430 AU P = 6.587 years ] [ T = 1913 Dec. 7.70713 TT Epoch = 1913 Dec. 19.0 TT Peri. = 354.98915 e = 0.5216401 Node = 56.39950 (2000.0) a = 3.4938364 AU Inc. = 46.43747 n'= 0.15092119 q = 1.6713114 AU P = 6.531 years ] [ T = 1920 June 21.23951 TT Epoch = 1920 June 5.0 TT Peri. = 355.13906 e = 0.5218098 Node = 56.33883 (2000.0) a = 3.4934251 AU Inc. = 46.44513 n'= 0.15094785 q = 1.6705216 AU P = 6.529 years ] [ T = 1927 Mar. 16.30511 TT Epoch = 1927 Mar. 21.0 TT Peri. = 356.17656 e = 0.4706219 Node = 55.67964 (2000.0) a = 3.6216557 AU Inc. = 46.21653 n'= 0.14300240 q = 1.9172252 AU P = 6.892 years ] [ T = 1934 Feb. 10.52365 TT Epoch = 1934 Feb. 12.0 TT Peri. = 356.31343 e = 0.4696531 Node = 55.63656 (2000.0) a = 3.6290813 AU Inc. = 46.16691 n'= 0.14256372 q = 1.9246720 AU P = 6.913 years ] [ T = 1941 Jan. 6.54865 TT Epoch = 1941 Jan. 6.0 TT Peri. = 356.22960 e = 0.4697088 Node = 55.65375 (2000.0) a = 3.6307999 AU Inc. = 46.18605 n'= 0.14246251 q = 1.9253811 AU P = 6.918 years ] [ T = 1947 Dec. 6.78693 TT Epoch = 1947 Dec. 1.0 TT Peri. = 356.14619 e = 0.4688477 Node = 55.66885 (2000.0) a = 3.6343842 AU Inc. = 46.14580 n'= 0.14225181 q = 1.9304114 AU P = 6.929 years ] [ T = 1954 Nov. 6.82939 TT Epoch = 1954 Oct. 25.0 TT Peri. = 356.22630 e = 0.4701316 Node = 55.62945 (2000.0) a = 3.6264720 AU Inc. = 46.20664 n'= 0.14271761 q = 1.9215528 AU P = 6.906 years ] [ T = 1961 Sept.21.40778 TT Epoch = 1961 Sept.18.0 TT Peri. = 356.66321 e = 0.4782728 Node = 55.48403 (2000.0) a = 3.5992120 AU Inc. = 46.35253 n'= 0.14434207 q = 1.8778070 AU P = 6.828 years ] [ T = 1968 July 24.38375 TT Epoch = 1968 Aug. 12.0 TT Peri. = 356.83787 e = 0.4782749 Node = 55.41914 (2000.0) a = 3.6009692 AU Inc. = 46.34921 n'= 0.14423643 q = 1.8787161 AU P = 6.833 years ] [ T = 1975 June 7.97178 TT Epoch = 1975 May 28.0 TT Peri. = 357.08975 e = 0.4709012 Node = 55.30933 (2000.0) a = 3.6274269 AU Inc. = 46.22821 n'= 0.14266127 q = 1.9192673 AU P = 6.909 years ] [ T = 1982 May 9.23849 TT Epoch = 1982 Apr. 21.0 TT Peri. = 357.13978 e = 0.4697332 Node = 55.29282 (2000.0) a = 3.6351745 AU Inc. = 46.17526 n'= 0.14220543 q = 1.9276122 AU P = 6.931 years ] [ T = 1989 Apr. 9.47734 TT Epoch = 1989 Apr. 24.0 TT Peri. = 357.15369 e = 0.4707644 Node = 55.29932 (2000.0) a = 3.6307590 AU Inc. = 46.21777 n'= 0.14246492 q = 1.9215268 AU P = 6.918 years ] [ T = 1996 Mar. 4.89225 TT Epoch = 1996 Mar. 18.0 TT Peri. = 357.04287 e = 0.4714602 Node = 55.30639 (2000.0) a = 3.6286573 AU Inc. = 46.22158 n'= 0.14258871 q = 1.9178898 AU P = 6.912 years ] The following residuals in seconds of arc (or two decimals in units of degrees) are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1783/ 030108 608 0.4- 1.7- 030128 340 (6.9+ 5.1-) 831119 500 0.42+ 0.65- Y 030108 608 0.1- 1.8- 030128 340 (5.7+ 4.7-) 831122 500 0.42+ 0.58- Y 030108 246 0.4- 0.6- 030128 340 (5.1+ 7.4-) 831125 500 0.40+ 0.49- Y 030108 246 0.7+ 1.4- 030128 340 (5.5+ 2.4-) 831128 500 0.37+ 0.37- Y 030108 246 0.1+ 1.4- 030129 J95 (3.2+ 4.1-) 831201 500 0.34+ 0.25- Y 030108 246 0.7- 1.4- 030129 J95 (3.3+ 3.7-) 831204 500 0.29+ 0.13- Y 030108 246 0.5+ 1.2- 030201 349 (4.0+ 4.4-) 831207 500 0.25+ 0.01- Y 030108 246 0.1+ 1.3- 030201 349 (4.4+ 3.6-) 831210 500 0.21+ 0.11+ Y 030108 557 1.1+ 0.6- 030201 349 (4.8+ 3.2-) 831213 500 0.16+ 0.21+ Y 030108 557 0.5+ 1.2- 030201 215 (3.1+ 3.7-) 831216 500 0.12+ 0.31+ Y 030108 557 0.1- 1.5- 030201 J95 (3.6+ 3.7-) 831219 500 0.09+ 0.40+ Y 030108 557 0.4+ 0.9- 030201 J95 (3.3+ 4.1-) 831221 500 0.07+ 0.45+ Y 030108 557 0.2+ 1.8- 030203 360 (3.6+ 4.0-) 2003/ 030108 176 1.4+ 1.1- 030203 360 (3.9+ 4.1-) 030105 704 0.7- 2.2+ 030108 176 0.6+ 2.1- 030204 608 (3.3+ 4.0-) 030105 704 1.5- 1.6+ 030108 176 (0.0 3.1-) 030204 608 (4.6+ 3.8-) 030105 704 1.0- 2.0+ 030111 349 1.8+ 2.3- 030204 608 (2.9+ 4.8-) 030106 446 0.5- 0.1- 030111 349 0.8+ 1.9- 030204 608 (3.9+ 4.5-) 030106 446 0.8- 0.4- 030111 213 1.7+ 1.9- 030204 608 (2.9+ 4.9-) 030106 446 0.0 0.1+ 030111 213 1.5+ 2.5- 030204 608 (4.3+ 3.9-) 030106 446 0.8- 0.1+ 030115 448 (2.9+ 4.1-) 030210 699 (2.9+ 3.2-) 030106 446 1.2- 0.1+ 030115 448 (3.3+ 3.7-) 030210 699 (2.9+ 2.8-) 030106 446 0.2- 0.6+ 030115 448 (3.2+ 3.9-) 030210 699 (3.0+ 2.2-) 030106 448 0.1- 0.2- 030116 204 (3.3+ 3.5-) 030210 699 (3.2+ 2.4-) 030106 670 (0.0 3.1+) 030116 204 (2.4+ 3.6-) 030211 608 1.8+ 1.9- 030106 448 1.9- 0.9- 030116 204 (3.0+ 3.9-) 030211 608 1.9+ 2.2- 030106 670 (1.2- 3.6+) 030116 204 (2.7+ 4.0-) 030216 J95 0.2+ 1.4- 030106 448 0.3- 0.3- 030117 448 (3.7+ 3.6-) 030216 J95 0.7+ 0.7- 030106 474 0.8+ 0.2+ 030117 448 (3.9+ 3.5-) 030218 J95 1.0+ 0.6- 030106 474 1.1+ 0.9+ 030117 448 (3.1+ 3.8-) 030218 J95 0.1+ 0.6- 030106 474 1.2+ 0.7- 030117 360 (2.8+ 4.4-) 030221 246 0.0 0.0 030106 474 (2.4- 4.2-) 030117 360 (3.0+ 4.2-) 030221 246 0.0 0.0 030106 474 1.7+ 2.1+ 030117 360 (3.4+ 4.1-) 030221 246 0.4- 0.1+ 030107 704 1.2+ 1.6+ 030117 246 (3.1+ 4.8-) 030221 246 0.2- 0.0 030107 704 0.5- 0.2- 030117 246 (2.8+ 4.7-) 030221 246 0.2- 0.0 030107 858 0.1+ 0.3- 030117 246 (3.9+ 4.0-) 030221 246 0.5+ 0.1- 030107 858 0.0 0.2+ 030117 246 (3.9+ 4.5-) 030222 699 0.2+ 0.6- 030107 704 (3.1+ 1.0+) 030117 246 (3.8+ 4.2-) 030222 699 0.2+ 0.0 030107 704 1.0- 0.5+ 030117 246 (4.0+ 4.1-) 030222 699 2.1+ 0.4+ 030107 858 0.4+ 0.2+ 030124 372 (6.0+ 2.8-) 030222 699 1.1+ 0.4- 030107 608 0.2- 0.6- 030125 130 (3.6+ 5.1-) 030222 J95 0.8+ 0.3+ 030107 608 0.2- 0.1+ 030125 130 (3.2+ 5.0-) 030222 J95 0.1+ 0.4+ 030107 608 0.1- 0.3- 030125 130 (3.0+ 4.9-) 030224 204 1.6- 0.0 030108 704 1.1+ 0.4- 030125 J95 (3.4+ 4.1-) 030224 204 0.9- 0.4+ 030108 704 0.3+ 0.5- 030125 J95 (3.8+ 4.1-) 030224 204 0.6- 0.4+ 030108 704 0.0 0.8- 030126 J95 (3.4+ 4.4-) 030224 204 1.0- 0.2+ 030108 858 1.2+ 0.9- 030126 J95 (3.4+ 4.9-) 030305 213 1.6- 2.2- 030108 704 (2.9- 1.3-) 030128 608 (4.4+ 3.4-) 030305 213 2.0- 0.4- 030108 858 1.8+ 0.5- 030128 608 (4.9+ 4.2-) 030305 213 1.3- 1.8+ 030108 704 0.1+ 0.5- 030128 608 (4.3+ 4.1-) 030313 J95(10.4- 1.0+) 030108 608 0.1- 1.5- 030128 372 (4.7+ 2.3-) 030313 J95 (9.4- 1.5+) Note I can't judge yet whether the last observations are good or bad. They show small residuals from an orbit using 2003 observations only. ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2003 Mar. 14