OAA computing section circular NK 551 Periodic Comet Metcalf-Brewington
The following improved orbital elements, by S. Nakano, are from 115 observations 1906 to 1991, including full planetary and five minor planets perturbations and non-gravitational effect of style II. The 1906 observations are through the kindness of G. V. Williams, Center for Astrophysics. The mean residual is +/- 1.38 arc seconds. Epoch = 1991 Jan. 24.0 ET T = 1991 Jan. 5.61458 +/- 0.00393 (m.e.) ET Peri. = 208.04861 +/- 0.00281 Node = 187.08234 +/- 0.00061 (1950.0) Inc. = 13.03404 +/- 0.00017 q = 1.5914659 +/- 0.0000059 AU e = 0.5938435 +/- 0.0000019 a = 3.9183562 +/- 0.0000024 AU nß = 0.12707151 +/- 0.00000012 P = 7.756 +/- 0.0000071 years A1 = +0.583 +/- 0.055 A2 = +0.06440 +/- 0.00177 T = 1906 Oct. 10.07727 ET Epoch = 1906 Sept.27.0 ET Peri. = 199.78491 e = 0.5844978 Node = 195.16907 (1950.0) a = 3.9259730 AU Inc. = 14.62823 nß= 0.12670190 q = 1.6312504 AU P = 7.779 years (T = 1914 June 7.53029 ET Epoch = 1914 May 28.0 ET Peri. = 203.03046 e = 0.5943330 Node = 190.12451 (1950.0) a = 3.9055001 AU Inc. = 13.49581 nß= 0.12769947 q = 1.5843325 AU P = 7.718 years ) (T = 1922 Mar. 4.91121 ET Epoch = 1922 Mar. 7.0 ET Peri. = 203.11920 e = 0.5931562 Node = 190.04090 (1950.0) a = 3.9171362 AU Inc. = 13.47308 nß= 0.12713088 q = 1.5936625 AU P = 7.753 years ) (T = 1929 Nov. 29.57889 ET Epoch = 1929 Dec. 15.0 ET Peri. = 203.21029 e = 0.5939529 Node = 190.03001 (1950.0) a = 3.9074846 AU Inc. = 13.47951 nß= 0.12760220 q = 1.5866226 AU P = 7.724 years ) (T = 1937 July 29.24625 ET Epoch = 1937 Aug. 15.0 ET Peri. = 206.12490 e = 0.6054413 Node = 187.68605 (1950.0) a = 3.8432523 AU Inc. = 13.17117 nß= 0.13081445 q = 1.5163885 AU P = 7.534 years ) (T = 1945 Feb. 15.87497 ET Epoch = 1945 Mar. 6.0 ET Peri. = 206.25572 e = 0.6047334 Node = 187.58556 (1950.0) a = 3.8492086 AU Inc. = 13.15644 nß= 0.13051094 q = 1.5214637 AU P = 7.552 years ) - continued - P/Metcalf-Brewington NK 551 - 2 (T = 1952 Sept. 3.99643 ET Epoch = 1952 Aug. 16.0 ET Peri. = 206.27676 e = 0.6048119 Node = 187.62792 (1950.0) a = 3.8503227 AU Inc. = 13.15556 nß= 0.13045429 q = 1.5216016 AU P = 7.555 years ) (T = 1960 Mar. 21.72116 ET Epoch = 1960 Mar. 7.0 ET Peri. = 206.43416 e = 0.6049421 Node = 187.54003 (1950.0) a = 3.8459984 AU Inc. = 13.13237 nß= 0.13067437 q = 1.5193919 AU P = 7.542 years ) (T = 1967 Oct. 7.85362 ET Epoch = 1967 Sept.27.0 ET Peri. = 206.52302 e = 0.6055467 Node = 187.45857 (1950.0) a = 3.8427116 AU Inc. = 13.13759 nß= 0.13084206 q = 1.5157704 AU P = 7.533 years ) (T = 1975 June 22.90950 ET Epoch = 1975 July 7.0 ET Peri. = 207.92774 e = 0.5941005 Node = 187.19329 (1950.0) a = 3.9186654 AU Inc. = 13.04691 nß= 0.12705647 q = 1.5905844 AU P = 7.757 years ) (T = 1983 Mar. 28.58972 ET Epoch = 1983 Apr. 16.0 ET Peri. = 207.95461 e = 0.5932699 Node = 187.17077 (1950.0) a = 3.9268947 AU Inc. = 13.02731 nß= 0.12665729 q = 1.5971864 AU P = 7.782 years ) The predicted orbit for the 2001 return is as follows: T = 2001 Apr. 11.12703 ET Epoch = 2001 Apr. 1.0 ET Peri. = 229.61809 e = 0.4569953 Node = 185.73321 (1950.0) a = 4.8001386 AU Inc. = 17.96838 nß= 0.09371808 q = 2.6064977 AU P = 10.517 years The following residuals in seconds of arc are from the above orbital elements: Date/ UT R.A. (1950) Decl. *** O-C *** Code/Obs h m s ¡ , " " " 1906 11 15.1146 04 06 47.9 -02 10 26.7 1.5- 2.2+ 803/me Y 1906 11 17.19878 04 06 21.01 -02 39 56.2 0.0 2.1- 786/WS 1906 11 19.93276 04 05 42.03 -03 15 05.5 1.5- 2.4- 020/NI 1906 11 19.97539 04 05 40.84 -03 15 40.1 ( 7.8- 6.1-) 014/ML 1906 11 20.09653 04 05 40.50 -03 16 57.5 ( 7.5+ 4.1+) 741/GS 1906 11 20.13907 04 05 38.53 -03 17 32.5 2.1+ 0.4- 020/NI 1906 11 20.86874 04 05 27.89 -03 25 53.2 ( 5.5- 0.7+) 051/CC 1906 11 20.87173 04 05 28.65 -03 26 09.9 ( 6.0+ 1.2+) 517/GE 1906 11 20.89885 04 05 27.67 -03 26 32.1 0.1+ 1.8- 045/VI 1906 11 20.90385 04 05 27.69 -03 26 29.2 ( 0.2+ 3.9+) 020/NI 1906 11 20.91855 04 05 26.91 -03 26 26.2 ( 6.1- 2.4+) 051/CC 1906 11 20.93503 04 05 27.01 -03 26 54.6 1.6- 0.1+ 014/ML 1906 11 20.96146 04 05 26.48 -03 27 13.2 1.9- 0.1- 020/NI 1906 11 20.97738 04 05 26.42 -03 27 27.8 1.8+ 3.0- 522/SR 1906 11 21.01548 04 05 25.59 -03 27 51.1 0.9- 0.1+ 007/PA - continued - P/Metcalf-Brewington NK 551 - 3 Date/ UT R.A. (1950) Decl. *** O-C *** Code/Obs. h m s ¡ , " " " 1906 11 21.01551 04 05 25.59 -03 27 51.1 0.4- 0.3- 513/LQ 1906 11 21.82440 04 05 13.96 -03 36 41.6 1.3+ 1.7+ 051/CC 1906 11 21.84473 04 05 12.94 -03 37 01.3 ( 8.4- 4.4-) 051/CC 1906 11 21.88620 04 05 12.89 -03 37 37.5 1.6+ 1.6+ 020/NI 1906 11 21.91151 04 05 12.52 -03 37 54.6 ( 4.5+ 1.9+) 045/VI 1906 11 21.93282 04 05 11.70 -03 38 16.6 ( 3.5- 6.7-) 014/ML 1906 11 22.10363 04 05 09.52 -03 40 02.0 0.1- 0.7- 786/WS 1906 11 22.12600 04 05 08.23 -03 40 18.8 1.5- 2.2- 020/NI 1906 11 22.86362 04 04 57.91 -03 48 09.4 1.1+ 0.0 020/NI 1906 11 22.86710 04 04 57.89 -03 48 16.4 ( 2.2+ 5.1-) 531/RM 1906 11 22.88555 04 04 57.36 -03 48 25.3 0.6- 2.4- 531/RM 1906 11 22.91408 04 04 56.94 -03 48 40.7 0.2+ 0.4+ 014/ML 1906 11 22.95874 04 04 55.95 -03 49 09.9 1.7- 0.8- 020/NI 1906 11 22.96706 04 04 56.15 -03 49 04.4 ( 2.5+ 10.1+) 999/BF 1906 11 23.01979 04 04 54.05 -03 49 50.8 (13.4- 2.5-) 015/UT 1906 11 23.22166 04 04 52.13 -03 51 51.1 2.1+ 0.5+ 765/CY 1906 11 23.25364 04 04 51.29 -03 52 11.1 0.1- 0.2+ 786/WS 1906 11 23.92194 04 04 41.41 -03 58 53.3 0.8+ 2.1+ 020/NI 1906 11 23.93072 04 04 41.65 -03 59 01.6 ( 6.6+ 1.1-) 014/ML 1906 11 23.95890 04 04 40.49 -03 59 22.9 ( 3.6- 5.5-) 999/BF 1906 11 23.97879 04 04 40.51 -03 59 30.5 ( 4.3+ 1.7-) 531/RM 1906 11 23.98759 04 04 40.11 -03 59 38.0 0.3- 3.3- 016/BS 1906 11 24.0420 04 04 40.01 -04 00 05.3 3.2+ 0.5+ 803/me 1906 11 24.17119 04 04 37.72 -04 01 18.3 ( 1.6+ 3.7+) 741/GS 1906 11 24.26607 04 04 35.64 -04 02 17.8 0.3- 1.3- 786/WS 1906 11 25.24649 04 04 20.74 -04 11 29.2 0.6+ 0.1- 786/WS 1906 11 25.32329 04 04 19.27 -04 12 15.7 ( 0.9- 4.7-) 765/CY 1906 11 26.07381 04 04 08.22 -04 18 55.0 ( 4.9+ 4.9-) 531/RM 1906 11 27.11645 04 03 52.24 -04 27 30.8 0.9+ 1.0+ 531/RM 1906 12 04.75580 04 02 14.10 -05 12 30.4 ( 3.6- 4.5-) 020/NI 1906 12 04.83994 04 02 13.29 -05 12 32.1 0.6+ 0.5- 051/CC 1906 12 04.84893 04 02 12.72 -05 12 36.6 ( 6.0- 3.0-) 051/CC 1906 12 05.04013 04 02 11.34 -05 13 30.9 0.4- 2.8- 786/WS 1906 12 05.82210 04 02 03.49 -05 15 54.7 1.6- 0.5- 051/CC 1906 12 05.83514 04 02 03.76 -05 16 05.9 3.1+ 3.2+ 008/AG 1906 12 05.84464 04 02 03.37 -05 16 12.4 1.0- 1.4- 008/AG 1906 12 05.85301 04 02 03.43 -05 16 09.8 1.5+ 2.8+ 008/AG 1906 12 05.85882 04 02 03.16 -05 15 54.7 ( 0.5+ 6.6+) 051/CC 1906 12 06.1903 04 02 00.1 -05 17 14 1.9- 0.7+ 662/LI Y 1906 12 06.82220 04 01 54.66 -05 18 47.0 0.9+ 1.7+ 051/CC 1906 12 06.87793 04 01 54.24 -05 19 12.0 ( 3.9+ 1.3-) 531/RM 1906 12 06.90176 04 01 54.24 -05 19 15.7 ( 8.1+ 1.3-) 531/RM 1906 12 07.82033 04 01 46.65 -05 21 17.9 ( 0.3+ 6.4+) 020/NI 1906 12 07.82400 04 01 46.61 -05 21 07.7 ( 0.9+ 4.0+) 051/CC 1906 12 07.84178 04 01 46.24 -05 21 11.7 1.7- 2.3+ 051/CC 1906 12 07.85931 04 01 45.53 -05 21 29.1 (10.5- 0.3+) 020/NI 1906 12 07.87054 04 01 45.36 -05 21 34.0 (10.5- 2.5-) 521/B1 1906 12 07.90555 04 01 44.96 -05 21 39.4 (11.7- 3.3-) 015/UT 1906 12 08.87652 04 01 39.21 -05 23 21.5 1.0+ 1.2- 008/AG 1906 12 08.88881 04 01 38.50 -05 23 21.2 ( 7.8- 0.2+) 008/AG - continued - P/Metcalf-Brewington NK 551 - 4 Date/ UT R.A. (1950) Decl. *** O-C *** Code/Obs. h m s ¡ , " " " 1906 12 08.90393 04 01 38.89 -05 23 01.7 ( 1.5+ 22.8+) 521/B1 1906 12 10.80570 04 01 28.76 -05 25 25.2 2.2- 0.9+ 020/NI 1906 12 10.85753 04 01 28.13 -05 25 12.2 ( 5.1- 3.0+) 051/CC 1906 12 10.87411 04 01 28.28 -05 25 29.9 2.3- 1.2- 020/NI 1906 12 10.87685 04 01 28.76 -05 25 29.0 ( 5.8+ 0.4-) 531/RM 1906 12 11.81909 04 01 25.08 -05 25 46.4 0.9- 0.9+ 020/NI 1906 12 11.85505 04 01 25.01 -05 25 47.4 1.7+ 0.0 531/RM 1906 12 12.15438 04 01 23.88 -05 25 47.2 0.0 0.1+ 786/WS 1906 12 12.83725 04 01 22.51 -05 25 36.3 1.3- 2.2+ 020/NI 1906 12 12.86894 04 01 22.31 -05 25 36.8 2.1- 1.0+ 020/NI 1906 12 13.21118 04 01 21.63 -05 25 28.7 0.1- 1.3- 765/CY 1906 12 13.82805 04 01 21.41 -05 24 50.1 0.3+ 1.1- 051/CC 1906 12 13.83999 04 01 21.64 -05 24 52.8 ( 4.4+ 4.4-) 051/CC 1906 12 15.84684 04 01 23.28 -05 22 21.3 ( 4.5+ 0.7+) 531/RM 1906 12 15.86918 04 01 22.93 -05 22 05.3 0.2+ 2.2+ 051/CC 1906 12 15.91830 04 01 22.70 -05 22 12.5 ( 3.9- 2.1+) 020/NI 1906 12 17.87446 04 01 30.39 -05 17 52.4 2.4+ 1.5+ 522/SR 1906 12 18.83241 04 01 35.69 -05 14 57.7 1.6- 0.4+ 051/CC 1906 12 18.84717 04 01 36.02 -05 15 08.2 2.0+ 1.0- 531/RM 1906 12 18.87177 04 01 36.30 -05 15 05.0 ( 4.5+ 1.6-) 522/SR 1906 12 18.87629 04 01 36.12 -05 14 57.3 ( 1.4+ 4.8+) 020/NI 1906 12 19.14650 04 01 38.14 -05 14 13.0 ( 5.1+ 1.8-) 765/CY 1906 12 20.84208 04 01 51.58 -05 08 01.9 2.3- 2.3+ 051/CC 1906 12 20.86121 04 01 51.43 -05 08 19.6 ( 7.0- 8.2-) 531/RM 1906 12 21.81659 04 02 01.52 -05 04 07.7 3.3- 2.3+ 051/CC 1906 12 21.84164 04 02 01.51 -05 03 55.8 ( 6.3- 7.9+) 051/CC 1907 01 05.83635 04 07 38.22 -03 27 11.8 0.7+ 0.3- 020/NI 1907 01 05.89021 04 07 40.13 -03 26 39.5 ( 4.1+ 5.1+) 020/NI 1907 01 06.02020 04 07 44.97 -03 25 40.6 ( 6.6+ 1.5-) 786/WS 1907 01 07.84576 04 08 48.81 -03 10 07.8 0.1- 0.0 020/NI 1907 01 08.85224 04 09 26.58 -03 01 21.0 2.8+ 1.7- 020/NI 1907 01 11.11539 04 10 56.29 -02 40 53.4 2.2+ 2.3+ 786/WS 1907 01 12.82312 04 12 08.90 -02 24 53.6 1.9+ 1.4+ 051/CC 1907 01 16.92891 04 15 20.05 -01 45 32.7 ( 7.3+ 0.1+) 020/NI 1991 01 05.45162 00 01 48.24 -06 34 39.2 ( 6.2+ 3.0-) 412/tn 1991 01 05.48773 00 01 53.49 -06 34 15.8 0.0 2.6- 412/tn 1991 01 07.44002 00 07 03.33 -06 13 14.2 ( 5.8+ 0.7+) 897/kj 1991 01 07.44341 00 07 03.80 -06 13 11.1 ( 4.8+ 1.5+) 897/kj 1991 01 08.47812 00 09 47.96 -06 01 45.4 0.8+ 1.3+ 413/SS 1991 01 08.80694 00 10 40.44 -05 58 14.4 0.9+ 1.4+ 026/BE 1991 01 09.41215 00 12 16.82 -05 51 31.0 0.3- 1.1+ 411/kb 1991 01 09.41389 00 12 17.15 -05 51 30.3 0.5+ 0.6+ 411/kb 1991 01 09.45139 00 12 23.08 -05 50 58.1 1.3+ 1.5+ 413/SS 1991 01 09.47448 00 12 26.65 -05 50 43.8 0.1- 0.3+ 413/SS 1991 01 09.49941 00 12 30.66 -05 50 32.7 0.1+ 0.7+ 372/sk 1991 01 09.50625 00 12 31.74 -05 50 27.0 0.0 1.8+ 372/sk 1991 01 09.79757 00 13 18.28 -05 47 15.5 0.7- 0.9- 026/BE 1991 01 10.42367 00 14 58.32 -05 40 12.2 0.5+ 0.1- 897/kj 1991 01 10.44034 00 15 01.09 -05 40 00.9 2.4+ 0.1- 897/kj 1991 01 10.45556 00 15 03.36 -05 39 50.5 0.3+ 0.0 401/OO - continued - P/Metcalf-Brewington NK 551 - 5 Date/ UT R.A. (1950) Decl. *** O-C *** Code/Obs. h m s ¡ , " " " 1991 01 10.46227 00 15 04.38 -05 39 46.3 0.3- 0.4- 401/OO 1991 01 10.77808 00 15 55.07 -05 36 12.0 0.8+ 1.1+ 503/CX 1991 01 11.47708 00 17 46.68 -05 28 08.2 0.1+ 1.1+ 415/hr 1991 01 11.48839 00 17 48.47 -05 28 00.2 0.1- 1.4+ 415/hr 1991 01 12.41944 00 20 17.79 -05 17 25.8 0.0 2.4+ 372/sk 1991 01 12.42317 00 20 18.15 -05 17 16.8 2.3- 1.8+ 474/JN 1991 01 12.42757 00 20 18.92 -05 17 13.1 1.3- 2.5+ 474/JN 1991 01 13.44583 00 23 02.48 -05 05 35.3 0.3- 0.7+ 372/sk 1991 01 13.76389 00 23 53.76 -05 01 54.6 0.4+ 0.5+ 984/ri 1991 01 13.96525 00 24 26.13 -04 59 33.3 0.8+ 0.3+ 801/HO 1991 01 13.96880 00 24 26.68 -04 59 30.7 0.6+ 0.4+ 801/HO 1991 01 13.97088 00 24 27.01 -04 59 29.3 0.6+ 0.3+ 801/HO 1991 01 14.82024 00 26 43.61 -04 49 32.6 0.2+ 0.0 503/CX 1991 01 15.42523 00 28 21.06 -04 42 23.4 0.7+ 0.2- 897/kj 1991 01 15.45590 00 28 25.95 -04 42 01.2 0.3+ 0.0 372/sk 1991 01 15.46250 00 28 26.97 -04 41 57.1 0.3- 0.7- 364/KA 1991 01 15.46875 00 28 27.96 -04 41 51.9 0.5- 0.0 364/KA 1991 01 15.47882 00 28 29.52 -04 41 44.6 1.0- 0.5+ 875/YO 1991 01 15.48449 00 28 30.35 -04 41 41.0 2.2- 0.0 875/YO 1991 01 17.42708 00 33 43.95 -04 18 21.7 1.5- 1.3+ 474/JN 1991 01 17.42975 00 33 44.35 -04 18 20.8 1.9- 0.3+ 474/JN 1991 01 17.45000 00 33 47.78 -04 18 15.5 0.3- 2.3- 364/KA 1991 01 17.45486 00 33 48.60 -04 18 10.6 0.3+ 1.0- 364/KA 1991 01 17.76667 00 34 39.00 -04 14 26.5 1.7- 0.9- 984/ri 1991 01 17.97122 00 35 12.18 -04 11 58.1 0.3+ 1.1- 801/HO 1991 01 19.43264 00 39 08.61 -03 54 12.8 1.0- 0.9- 897/kj 1991 01 19.44329 00 39 10.36 -03 54 03.1 0.5- 1.0+ 897/kj 1991 01 19.44606 00 39 10.99 -03 54 02.3 2.3+ 0.3- 897/kj 1991 01 20.17031 00 41 08.29 -03 45 11.0 0.1- 0.2+ 657/VC 1991 01 22.45347 00 47 19.01 -03 16 57.0 0.4- 1.1+ 364/KA 1991 01 22.45590 00 47 19.50 -03 16 56.6 1.1+ 0.3- 364/KA 1991 01 25.72083 00 56 11.05 -02 36 02.8 1.5- 1.5- 046/KL 1991 01 25.72257 00 56 11.24 -02 35 59.8 ( 2.9- 0.2+) 046/KL 1991 02 01.74147 01 15 18.28 -01 06 16.6 0.8+ 1.5- 046/KL 1991 02 01.74459 01 15 18.81 -01 06 13.1 1.2+ 0.5- 046/KL 1991 02 02.75171 01 18 03.45 -00 53 13.8 2.1- 1.7- 046/KL 1991 02 02.75478 01 18 03.98 -00 53 10.3 1.7- 0.6- 046/KL 1991 02 09.96613 01 37 46.12 +00 40 21.5 0.1+ 0.1- 801/HO 1991 02 11.99220 01 43 18.53 +01 06 36.7 0.9+ 0.3- 801/HO 1991 02 16.97331 01 56 55.82 +02 10 46.5 0.6+ 1.6- 801/HO 1991 02 17.75985 01 59 04.80 +02 20 49.5 0.0 2.0- 046/KL 1991 02 17.76436 01 59 05.48 +02 20 54.2 0.8- 0.8- 046/KL 1991 02 18.76916 02 01 50.33 +02 33 41.9 0.2- 2.2- 046/KL 1991 02 18.77361 02 01 51.17 +02 33 46.5 1.5+ 1.0- 046/KL 1991 03 02.84795 02 34 46.90 +05 03 11.6 ( 1.5+ 4.8-) 984/ri 1991 03 03.43409 02 36 22.52 +05 10 15.3 2.5+ 1.3- 897/kj 1991 03 03.46094 02 36 26.85 +05 10 40.4 ( 2.0+ 4.7+) 897/kj 1991 04 03.46146 03 59 30.77 +10 26 17.3 0.8- 1.8- 372/sk 1991 04 03.46979 03 59 32.27 +10 26 20.6 2.0+ 2.5- 372/sk ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 1991 August 8