Nakano Note (Nakano wa Kangaeru noda) NK 2732 65P/Gunn (1954 P1 = 1970 U2)

The following improved orbital elements, by S. Nakano, are from 88 observations 1954 to 1984, including planetary perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas, Vesta, and non-gravitational effect of sublimating molecule = CO (or N2) using Yabushita's theory (MN 283, 347). The mean residual is +/- 1.16 arc seconds. See the previous orbits in NK 282, NK 373, NK 595, NK 709, NK 728, NK 1261, NK 1455, NK 1941 and NK 2591 (= HICQ 2014). Epoch = 1982 Nov. 7.0 TT T = 1982 Nov. 26.88871 +/- 0.00090 (m.e.) TT Peri. = 197.01598 +/- 0.00036 Node = 68.55028 +/- 0.00024 (2000.0) Inc. = 10.38506 +/- 0.00004 q = 2.4591516 +/- 0.0000028 AU e = 0.3163595 +/- 0.0000005 a = 3.5971415 +/- 0.0000013 AU n' = 0.14446671 +/- 0.00000008 P = 6.822 +/- 0.0000038 years Y1 = +0.328 +/- 0.018 Y2 = +0.03983 +/- 0.00055 T = 1953 May 20.45940 TT Epoch = 1953 May 23.0 TT Peri. = 173.96144 e = 0.1761004 Node = 80.40094 (2000.0) a = 4.0125008 AU Inc. = 10.86523 n'= 0.12262566 q = 3.3058978 AU P = 8.038 years [ T = 1961 May 26.06112 TT Epoch = 1961 May 21.0 TT Peri. = 173.87168 e = 0.1784318 Node = 80.38159 (2000.0) a = 4.0033298 AU Inc. = 10.87238 n'= 0.12304728 q = 3.2890085 AU P = 8.010 years ] T = 1969 Apr. 18.89547 TT Epoch = 1969 Apr. 9.0 TT Peri. = 197.15385 e = 0.3195109 Node = 68.70244 (2000.0) a = 3.5877825 AU Inc. = 10.39595 n'= 0.14503236 q = 2.4414470 AU P = 6.796 years T = 1976 Feb. 10.82569 TT Epoch = 1976 Jan. 23.0 TT Peri. = 197.51368 e = 0.3190728 Node = 68.64194 (2000.0) a = 3.5899953 AU Inc. = 10.38984 n'= 0.14489829 q = 2.4445256 AU P = 6.802 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1954/ 750321 372 1.2- 1.8+ 771008 801 0.4- 2.3- 540808 675 1.4+ 5.1+ 750411 693 2.5+ 0.2+ 771018 323 0.1- 0.8- 540808 675 3.5- 0.2+ 750411 693 2.5+ 0.1+ 771213 323 0.5- 0.9- 1970/ 750415 805 1.3- 0.8- 1978/ 701027 675 (3.0- 5.3+)Y 750418 801 0.3- 0.5+ 781028 801 2.4- 0.8- 1971/ 750418 805 0.3- 0.4- 781031 801 2.2- 0.0 710121 691 0.4- 0.0 750420 805 0.8+ 0.0 781129 675 (3.9- 0.1-) 710121 691 0.4- 0.1+ 750430 801 (3.6+ 0.3-) 781130 675 2.3- 0.1- 710228 693 1.1- 0.6- 750510 046 (0.1- 2.9-) 1980/ 710303 691 0.3+ 0.2+ 750510 046 0.8+ 1.9- 801207 801 2.7- 1.8+ 710914 691(12.3- 0.4-)Y 750513 046 (1.5+ 4.0-) 1981/ 710922 691(10.2- 3.2-)Y 750514 046 0.9- 1.4+ 810106 801 1.0- 1.7+ 711118 691(14.3- 3.5+)Y 750514 046 0.6- 1.1- 810126 675 1.4- 0.2- 1972/ 750609 693 (3.0+ 0.1+) 810204 801 0.3- 2.2+ 721203 693 2.0+ 0.2- 750609 693 2.5+ 0.1+ 811230 809 (2.4- 2.9+) 721203 693 1.6+ 0.1+ 750612 805 0.2- 0.5- 811231 809 0.5- 0.2+ 721213 691 1.5+ 0.1- 750612 801 1.5+ 1.4+ 1982/ 721213 691 1.3+ 0.0 750612 805 0.7- 0.3- 820201 805 0.8- 0.8+ 1973/ 750703 801 1.1+ 0.3- 820201 805 0.5- 0.7+ 730103 801 0.7- 2.3- 1976/ 820227 801 2.0- 1.7+ 730108 691 0.4+ 0.2- 760424 485 1.3- 0.6- 820326 707 2.2- 1.3- 730108 691 0.8+ 0.1- 760424 485 (3.1+ 2.1-) 820420 801 0.5- 0.2+ 731219 801 2.5- 0.6+ 760527 413 (0.7- 2.9+) 820516 675 0.4- 0.9+ 731230 691 1.8+ 0.7- 760527 413 1.0- 0.4+ 820523 372 0.6+ 0.3- 731230 691 1.9+ 0.6- 760527 413 2.6- 0.4- 820526 801 0.5- 0.8+ 1974/ 760604 485 0.6- 0.4- 820527 707 0.9- 1.8- 740120 801 0.6- 0.3+ 760604 485 0.0 0.2+ 820621 801 1.6+ 1.2- 740214 801 0.8- 0.6+ 760606 808 0.2+ 0.8- 820719 801 1.6+ 0.7- 740225 691 0.1+ 1.3+ 760606 807 0.9+ 0.4+ 1983/ 740225 691 0.3+ 1.1+ 760606 808 0.1- 0.5+ 830622 707 (3.3+ 0.4+) 740313 801 2.5+ 1.8+ 760726 474 1.1+ 1.1- 830712 474 0.4+ 0.1+ 740328 801 0.5- 1.5- 760726 474 (0.3+ 2.9-) 830712 474 1.5+ 0.3+ 740525 691 1.9+ 0.0 760820 372 1.8+ 0.2+ 830928 707 1.6+ 0.1+ 740525 691 1.2+ 0.2- 760918 485 0.1- 0.9- 1984/ 741212 372 1.4- 0.2+ 760918 485 0.2- 0.6- 840824 801 0.0 0.7+ 741216 372 (3.1- 0.2+) 760923 879 0.5- 2.3+ 840827 801 0.3+ 1.5+ 741223 801 0.9+ 1.3- 761019 323 (2.8- 0.1-) 840828 801 0.1+ 0.9+ 1975/ 761116 323 0.5+ 1.2- 840923 801 2.4+ 1.4+ 750113 805 1.3- 0.0 1977/ 841021 801 2.3+ 1.4+ 750114 805 0.0 0.6- 770821 801 (3.9- 0.2-) 841224 801 0.2+ 1.6+ 750117 380 0.4+ 0.2- 770911 801 2.4- 0.6+ ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2014 June 25

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