August 30, 2002 Comet P/2002 P4 = P/1992 Q1 ( Brewington ) *** Comet 154P/Brewington The following improved orbital elements by Kenji Muraoka, are from 98 observations 1992 Aug. 28 to 2002 Aug. 29, perturbations by 9 Plantes, Moon and 5 minor planets were taken into account. The mean residual is +/- 0.93 arc seconds. Epoch = 2003 Feb. 10.0 TT JDT = 2452680.5 T = 2003 Feb. 19.36732 +/- 0.00063 (m.e.) TT Peri. = 48.00551 +/- 0.00036 Node = 343.64448 +/- 0.00020 (2000.0) Incl. = 18.05944 +/- 0.00005 q = 1.5903443 +/- 0.0000107 AU e = 0.6716553 +/- 0.0000020 a = 4.8435205 +/- 0.0000090 AU nK = 0.09246180 +/- 0.00000026 P = 10.660 +/- 0.0000296 years T = 1992 June 7.79657 TT Epoch = 1992 June 27.0 TT Peri. = 47.83575 e = 0.6707581 Node = 343.73684 (2000.0) a = 4.8625808 AU Incl. = 18.05772 nK = 0.091918689 q = 1.6009653 AU P = 10.723 years Residuals in seconds of arc 920828 402 (1.0- 2.1+) 920926 410 0.5- 0.0 921225 801 1.0- 0.5- 920828 402 (2.9- 0.8+) 920926 410 1.1- 0.2+ 921225 801 1.3- 0.4+ 920828 897 (9.8- 4.0+) 920926 410 0.3+ 0.2+ 921231 372 1.8+ 1.5- 920828 402 1.5- 1.1+ 920927 589 (0.4+ 2.2+) 921231 372 0.4- 0.1+ 920829 372 0.2- 0.1+ 920927 589 1.0+ 0.3+ 930121 801 0.2+ 1.1- 920829 372 0.4+ 0.3- 920927 589 1.9+ 1.0- 930121 801 0.3+ 0.7- 920829 372 0.2+ 0.0 920927 411 1.8+ 2.0- 930124 691 0.4- 0.9- 920831 557 0.8- 0.6+ Y 920927 411 0.4+ 0.2+ 930124 691 0.2- 0.9- 920831 557 1.7- 1.0- Y 920927 411 (0.8- 2.1+) 930124 691 0.3- 0.8- 920831 557 (2.7- 1.9-)Y 921001 801 1.1- 0.9+ 930131 658 0.6+ 0.7+ 920831 801 1.2- 0.7+ 921001 801 0.5- 0.6+ 930131 658 0.1- 1.3- 920831 801 0.8- 0.8+ 921002 900 1.7- 0.8- 930131 658 (1.1- 2.3+) 920831 897 0.7- 1.8+ 921002 900 0.1- 2.0- 930330 691 0.8+ 0.1- 920831 372 (2.4+ 0.9+) 921002 410 (3.0- 1.3+) 930330 691 0.7- 0.4+ 920831 372 (4.3+ 0.0 ) 921002 410 0.5- 0.0 930330 691 0.2+ 0.4- 920831 372 (2.7+ 0.6-) 921005 372 0.1+ 1.0+ 930330 691 1.9- 0.6- 920831 894 0.2+ 1.6- 921006 894 1.3+ 0.6+ 020810 349 1.0- 0.4+ 920831 897 1.9- 0.6+ 921006 894 0.5- 0.9+ 020810 349 1.3- 0.9+ 920901 657 2.0+ 0.1- 921020 691 0.5- 0.4- 020810 349 1.4+ 0.4- 920901 894 (2.5+ 0.2+) 921020 691 0.1- 0.6- 020826 844 0.8+ 1.3+ 920902 657 (0.6+ 2.8-) 921020 691 0.4- 0.6- 020826 844 (3.5+ 0.0 ) 920903 894 (2.8+ 0.8-) 921027 372 1.4+ 2.0- 020826 844 0.2+ 0.1+ 920904 372 1.3+ 0.3- 921027 372 (5.2- 2.3-) 020827 844 0.5+ 0.4+ 920904 894 (2.2+ 2.0-) 921029 801 1.1- 0.2+ 020827 844 0.6+ 1.9- 920904 372 1.0+ 0.1+ 921029 801 1.0- 0.2+ 020827 844 (1.0+ 2.6-) 920905 411 1.5+ 0.2+ 921030 897(10.0- 4.8-)Y 020827 844 1.1- 0.6+ 920905 411 1.6+ 0.3- 921030 897 (6.2- 2.8+)Y 020827 844 1.7- 1.1- 920905 411 0.6+ 0.0 921030 411 1.1- 1.2+ 020827 844 (3.2- 5.0-) 920905 372 0.8+ 0.3+ 921030 411 0.9+ 0.6- 020827 844 0.7- 1.0- 920906 587 (2.6+ 0.3+) 921030 411 1.7- 0.4+ 020827 844 0.9+ 0.1- 920906 587 (3.1+ 0.7+) 921121 411 0.2- 0.4- 020827 844 0.4- 0.2- 920906 587 0.6+ 0.1+ 921121 411 (2.7- 0.1+) 020827 844 0.9+ 0.9- 920925 801 1.2- 0.3+ 921128 691 0.3+ 0.2- 020827 844 1.4- 0.3- 920925 801 1.5+ 0.3- 921128 691 0.6+ 0.1- 020828 844 1.1- 0.4- 920925 372 0.1+ 0.0 921128 691 1.3+ 0.3- 020828 844 (3.8+ 0.6-) 920925 372 1.3- 0.1- 921203 658 0.7+ 0.3- 020829 340 0.8+ 1.4+ 920926 372 1.0- 0.1- 921203 658 0.7+ 0.1+ 020829 340 1.5+ 1.4- 920926 897 0.5+ 1.0+ 921203 658 0.8+ 0.2- 020829 340 0.9+ 1.4- 920926 372 0.3+ 0.7+ 921204 411 0.4- 0.6+ 020829 340 1.0+ 1.9- 920926 894 (3.4- 1.9-) 921204 411 0.2+ 0.7+ 020829 340 1.3+ 1.3- 920926 897 1.3- 1.3+ 921221 801 1.5- 0.0 020829 340 0.7+ 0.5+ 920926 894 (4.1+ 1.1-) 921221 801 1.7- 0.0 August 29, 2002 Comet P/2002 Q4 = P/1992 Q1 ( Brewington ) The following improved orbital elements by Kenji Muraoka, are from 88 observations 1992 Aug. 28 to 2002 Aug. 28, perturbations by 9 Plantes, Moon and 5 minor planets were taken into account. The mean residual is +/- 0.87 arc seconds. Epoch = 2003 Feb. 10.0 TT JDT = 2452680.5 T = 2003 Feb. 19.36840 +/- 0.00061 (m.e.) TT Peri. = 48.00596 +/- 0.00039 Node = 343.64415 +/- 0.00020 (2000.0) Incl. = 18.05952 +/- 0.00005 q = 1.5903455 +/- 0.0000110 AU e = 0.6716551 +/- 0.0000020 a = 4.8435210 +/- 0.0000092 AU nK = 0.09246179 +/- 0.00000026 P = 10.660 +/- 0.0000304 years T = 1992 June 7.79703 TT Epoch = 1992 June 27.0 TT Peri. = 47.83620 e = 0.6707579 Node = 343.73651 (2000.0) a = 4.8625814 AU Incl. = 18.05779 nK = 0.091918674 q = 1.6009665 AU P = 10.723 years P/2002 Q4 (Brewington) Epoch 2002 Sept. 3.0 TT = JDT 2452520.5 T 2003 Feb. 19.35779 TT Muraoka q 1.5903705 (2000.0) P Q n 0.09240649 Peri. 48.00074 +0.84100400 -0.53394038 a 4.8454532 Node 343.64452 +0.35750023 +0.66953884 e 0.6717809 Incl. 18.05872 +0.40608603 +0.51635784 P 10.67 From 88 observations 1992 Aug. 28-2002 Aug. 28, mean residual 0".87. --