OAA computing section circular NK 791 48P/Johnson
The following improved orbital elements, by S. Nakano, are from 237 observations 1949-1999, including planetary perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas, Vesta, and non-gravitational effect of style II. The mean residual is +/- 0.83 arc second. See an orbit on MPC 30064. Epoch = 1997 Nov. 8.0 TT T = 1997 Oct. 31.84905 +/- 0.00023 (m.e.) TT Peri. = 207.99096 +/- 0.00008 Node = 117.35387 +/- 0.00005 (2000.0) Inc. = 13.66437 +/- 0.00002 q = 2.3083077 +/- 0.0000007 AU e = 0.3672591 +/- 0.0000002 a = 3.6481087 +/- 0.0000004 AU n' = 0.14144983 +/- 0.00000002 P = 6.968 +/- 0.0000011 years A1 = +0.695 +/- 0.021 A2 = -0.02336 +/- 0.00070 T = 1949 Sept.16.52207 TT Epoch = 1949 Sept. 1.0 TT Peri. = 206.15919 e = 0.3774526 Node = 118.86243 (2000.0) a = 3.6110686 AU Inc. = 13.86843 n'= 0.14363176 q = 2.2480612 AU P = 6.862 years T = 1956 July 26.90583 TT Epoch = 1956 July 26.0 TT Peri. = 206.03872 e = 0.3754711 Node = 118.84306 (2000.0) a = 3.6168205 AU Inc. = 13.85373 n'= 0.14328926 q = 2.2588089 AU P = 6.878 years T = 1963 June 9.18195 TT Epoch = 1963 June 20.0 TT Peri. = 206.06743 e = 0.3775012 Node = 118.83180 (2000.0) a = 3.6099942 AU Inc. = 13.86493 n'= 0.14369588 q = 2.2472170 AU P = 6.859 years T = 1970 Mar. 30.04433 TT Epoch = 1970 Apr. 4.0 TT Peri. = 206.02318 e = 0.3854358 Node = 118.53483 (2000.0) a = 3.5797116 AU Inc. = 13.89855 n'= 0.14552313 q = 2.1999626 AU P = 6.773 years T = 1977 Jan. 8.43093 TT Epoch = 1977 Jan. 17.0 TT Peri. = 206.23178 e = 0.3860608 Node = 118.47211 (2000.0) a = 3.5763528 AU Inc. = 13.90319 n'= 0.14572818 q = 2.1956632 AU P = 6.763 years T = 1983 Dec. 3.21827 TT Epoch = 1983 Dec. 12.0 TT Peri. = 208.17600 e = 0.3674922 Node = 117.40058 (2000.0) a = 3.6395178 AU Inc. = 13.67403 n'= 0.14195095 q = 2.3020236 AU P = 6.943 years T = 1990 Nov. 18.96209 TT Epoch = 1990 Nov. 5.0 TT Peri. = 208.29943 e = 0.3661478 Node = 117.34954 (2000.0) a = 3.6484254 AU Inc. = 13.66108 n'= 0.14143141 q = 2.3125625 AU P = 6.969 years The predicted orbit for the 2004 return is as follows: T = 2004 Oct. 11.96892 TT Epoch = 2004 Oct. 2.0 TT Peri. = 207.69501 e = 0.3665058 Node = 117.32962 (2000.0) a = 3.6464071 AU Inc. = 13.65825 n'= 0.14154885 q = 2.3099776 AU P = 6.963 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1949/ 900617 675 0.4- 0.6- 970709 046 0.1- 0.1- 490815 078 (3.0- 1.3+) 900617 373 (5.1+ 0.1-) 970709 046 0.3- 0.1- 490820 078 1.6- 2.4+ 900618 675 0.2- 0.1+ 970709 046 0.3- 0.0 490824 078 0.3+ 1.4- 900618 675 0.5- 0.3- 970711 696 0.7+ 0.4- 490825 078 1.2- 1.5- 900618 675 0.2- 0.3- 970711 696 0.7+ 0.5- 490826 078 1.2- 1.4- 900725 373 0.6- 0.3+ 970711 696 0.8+ 0.2- 490829 078 1.2+ 0.4+ 900725 373 (4.9- 0.2+) 970711 696 0.5+ 0.2- 490909 078 (2.5- 2.7+) 900909 413 1.2- 0.3- 970711 696 0.4+ 0.2- 490909 822 0.7+ 1.1- 900909 413 (2.7- 0.1+) 970722 118 0.5+ 0.6+ 490910 822 0.3- 0.4+ 900911 413 0.5- 0.3- 970722 118 0.7+ 0.5+ 490912 078 (3.8- 1.0+) 900911 413 1.2- 0.4+ 970722 118 0.8+ 0.6+ 490915 078 1.2- 0.3- 1991/ 970723 954 0.8+ 0.5- 490917 822 0.8+ 1.6- 911016 691 (2.7- 0.6+) 970723 954 0.7+ 0.5- 490917 822 0.5- 1.0- 911016 691 (2.6- 0.5-) 970723 954 1.0+ 0.4- 490920 078 0.5- 2.1+ 911016 691 (2.8- 0.4+) 970723 954 0.9+ 0.6- 490924 662 0.2+ 1.2- 1996/ 970724 954 (3.8+ 7.7-) 490924 662 0.2+ 1.3- 960316 709 1.9+ 0.4+ 970724 954 1.0+ 0.3- 490924 662 0.9- 1.1- 960316 709 0.2+ 1.2+ 970724 954 0.9+ 0.3- 490924 662 0.9- 1.2- 960316 709 1.5+ 0.0 970724 954 0.9+ 0.7- 491013 078 (3.8- 0.4-) 960316 709 1.9+ 1.5+ 970724 360 0.6+ 0.1- 491014 078 0.0 1.9- 960316 709 0.5+ 0.4- 970724 360 0.6+ 0.1- 491016 078 0.0 0.1+ 960409 709 0.4+ 0.8+ 970724 867 0.7+ 0.0 491016 008 0.2+ 0.4- 960409 709 0.6+ 0.3- 970724 867 0.8+ 0.4- 491016 008 0.2- 1.6- 960409 709 1.1+ 0.4+ 970724 867 0.7+ 0.1- 491119 079 0.4- 0.9- 960409 709 0.2+ 0.0 970804 118 0.6- 0.2+ 1956/ 960409 709 0.4+ 0.1- 970804 118 1.0- 0.3- 560806 076 1.1+ 0.9+ 960409 709 1.0+ 0.8- 970806 118 0.9- 0.8+ 560810 076 (2.8+ 1.9-) 960409 709 0.7+ 0.1+ 970806 118 0.6- 0.7+ 560829 076 (2.4+ 2.6-) 960409 709 1.1+ 0.6- 970807 108 (2.9+ 0.5+) 560903 754 0.2- 0.9+ 960409 709 0.6+ 0.2- 970807 108 0.9+ 1.7+ 560903 754 1.3+ 1.7+ 960515 691 0.4- 1.1+ 970807 108 0.0 2.0+ 560906 076 (4.0+ 3.4+) 960515 691 0.6- 1.0+ 970807 118 0.9- 0.6+ 560912 076 0.2+ 1.0+ 960515 691 0.8- 1.0+ 970807 118 0.7- 0.3+ 1963/ 960615 568 0.6- 0.3- 970809 046 0.7- 0.6+ 630424 689 2.2- 0.4- 960615 568 0.2- 0.5- 970809 046 0.9- 0.3+ 630429 689 0.2+ 0.9+ 960615 568 0.6- 0.2+ 970809 046 0.8- 0.4+ 630504 689 2.0- 0.0 1997/ 970810 118 0.7- 0.3- 630523 689 2.0+ 1.5+ 970512 046 0.7- 0.4+ 970810 118 0.6- 0.1- 630531 689 1.5+ 0.1+ 970512 046 0.9- 0.6+ 970810 118 0.7- 0.4- 630531 689 1.0+ 1.1- 970512 046 1.8- 1.3+ 970820 118 0.5+ 0.3- 630621 689 0.2+ 0.2- 970515 118 0.8+ 0.0 970820 118 0.0 0.3- 630627 689 0.3- 0.9- 970515 118 0.9+ 0.1+ 970821 118 0.8- 0.4+ 630627 689 0.1+ 0.3- 970515 118 0.9+ 0.0 970821 118 0.5- 0.7+ 630715 689 1.1+ 0.0 970531 402 0.3+ 0.4+ 970821 118 0.6- 0.5+ 630715 689 1.5+ 0.2- 970531 402 0.1- 0.4+ 970824 372 1.8- 1.3+ 630825 689 0.8+ 0.6- 970531 402 0.3- 0.6+ 970824 118 0.7- 0.2- 630825 689 0.8+ 0.4- 970531 360 0.7+ 0.0 970824 118 0.7- 0.1+ 630911 689 1.0+ 0.3- 970531 360 0.8+ 0.2+ 970824 118 0.4- 0.0 630911 689 0.9+ 0.6+ 970601 118 0.2+ 0.7+ 970827 360 0.2- 0.1- 631009 689 0.4+ 1.0+ 970601 118 0.1+ 0.5+ 970827 360 0.3- 0.3- 631025 689 1.2+ 0.5+ 970603 691 0.6+ 0.2+ 970915 118 0.7- 1.1+ 631025 689 0.8+ 0.0 970606 897 0.3+ 0.9- 970915 118 0.6- 1.1+ 631109 689 (3.2- 0.0 ) 970607 867 0.4+ 0.3+ 971021 867 1.2- 0.0 631109 689 (2.9- 0.7-) 970607 867 0.5+ 0.3+ 971021 867 1.4- 0.0 631214 689 (1.0+ 3.1+) 970610 046 0.5+ 0.2+ 971021 867 1.3- 0.3+ 631218 689 0.4- 1.2+ 970610 046 0.7+ 0.3+ 971023 861 1.2- 0.0 631218 689 0.3+ 1.0+ 970610 046 0.6+ 0.1+ 971023 861 1.3- 0.0 1964/ 970610 118 0.9+ 0.1+ 971023 861 0.8- 0.3+ 640109 689 0.2- 0.0 970611 118 0.5+ 0.1+ 971026 360 0.6- 0.6- 1969/ 970612 360 1.0+ 0.1+ 971026 360 0.6- 0.8- 690517 693 1.4- 1.0- 970612 360 0.9+ 0.2+ 971026 897 2.1- 0.6+ 690517 693 0.7- 1.0- 970613 402 0.9+ 0.5+ 971026 897 1.3- 0.1+ 690525 693 1.4- 0.3+ 970613 402 0.8+ 0.1+ 971026 897 0.3+ 0.2+ 690525 693 (3.7- 0.6+) 970613 402 1.0+ 0.2+ 971028 861 (2.8- 1.2-) 1970/ 970625 954 1.6+ 0.4+ 971028 861 2.0- 0.1+ 700705 693 1.0+ 0.4- 970625 954 1.5+ 0.4+ 971028 861 1.5- 0.3- 700705 693 1.0+ 0.6- 970625 954 1.6+ 0.4+ 971123 897 0.9- 0.2+ 701003 691 1.8- 0.4+ 970625 954 1.6+ 0.4+ 971123 897 0.3- 0.6+ 701003 691 2.1- 0.4+ 970625 954 1.5+ 0.3+ 971123 897 1.7+ 0.2- 1976/ 970625 954 (1.8- 2.7-) 971221 897 (2.7+ 4.3+) 760505 691 0.7+ 0.8- 970625 954 1.5+ 0.2+ 971226 426 0.9+ 1.1+ 760505 691 0.2- 0.3+ 970625 954 1.5+ 0.2+ 971226 426 1.4+ 1.2+ 760528 801 (1.4- 3.4-) 970626 118 0.4- 0.3+ 971226 426 2.1+ 0.8+ 760529 691 1.1- 1.4- 970626 118 0.5- 0.0 1998/ 1977/ 970629 402 0.0 0.4- 980916 693 0.3+ 0.0 771115 801 1.0- 0.5+ 970629 402 0.1+ 0.4- 980916 693 0.5+ 0.1- 771211 801 (9.5- 4.3+) 970629 402 0.2+ 0.4- 980916 693 0.5+ 0.1+ 1983/ 970629 360 0.4+ 0.5- 981114 867 0.2- 0.6+ 830607 474 0.6+ 1.7+ 970629 360 0.0 0.2- 981114 867 0.8- 0.2+ 830607 474 0.3+ 2.3+ 970629 897 0.6- 0.1+ 981114 867 0.5- 0.2- 830712 474 1.0- 0.2+ 970629 897 0.8- 0.1+ 981115 867 1.1- 0.1- 830712 474 1.0- 0.7- 970630 372 0.5- 0.9+ 981115 867 0.6- 0.0 830714 801 1.1- 0.2- 970703 954 0.2- 0.2- 981115 867 1.7- 1.0+ 831004 474 0.2+ 0.4+ 970703 954 0.3- 0.2- 981123 693 0.9- 0.8+ 831004 474 0.5+ 0.2+ 970703 954 0.4- 0.2- 981123 693 1.0- 1.3+ 1984/ 970703 954 0.2- 0.3- 981123 693 1.0- 1.1+ 841003 801 (6.0- 4.8+) 970704 402 0.2- 0.2- 981221 360 0.4+ 1.7+ 841025 801 0.8+ 0.2+ 970704 402 0.4- 0.5+ 981221 360 0.3+ 1.6+ 841121 801 (2.9+ 1.1+) 970704 402 0.3- 0.1- 981221 360 0.0 1.4+ 841224 801 (1.9+ 5.5+) 970705 360 0.3- 0.1+ 1999/ 1990/ 970705 372 0.4- 1.5+ 990213 693 0.6- 0.1+ 900526 372 1.9- 0.8- 970705 360 0.0 0.2- 990213 693 0.6- 0.5- 900526 372 1.9- 0.5+ 970708 327 1.3- 1.7+ 990213 693 1.0- 0.5+ 900617 675 0.4- 0.2- 970708 327 (3.7- 0.2-) ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2001 Apr. 28