Nakano Note (Nakano wa Kangaeru noda) NK 2365 P/Pons-Gambart (1827 M1 = 2012 V4)

The following improved orbital elements, by S. Nakano, are from 203 observations 1827 to 2012. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The weighting mean residual is +/- 0.54 arc second. The past returns are 257, 471, 673, 864, 1064, 1256, 1454 and 1645. These results deny the identifications with the acient comets by I. Hasegawa and the author on Table 4 of PASJ 47, 699-710 (1995). Epoch = 2012 Dec. 19.0 TT T = 2012 Dec. 19.66213 +/- 0.00066 (m.e.) TT Peri. = 20.17570 +/- 0.00110 Node = 320.43217 +/- 0.00030 (2000.0) Inc. = 136.40074 +/- 0.00056 q = 0.8101667 +/- 0.0000048 AU e = 0.9753206 +/- 0.0000001 a = 32.8276929 +/- 0.0000083 AU n' = 0.00524015 +/- 0.00000000 P = 188.088 +/- 0.0000709 years T = 1827 June 8.06307 TT Epoch = 1827 June 13.0 TT Peri. = 20.03742 e = 0.9754189 Node = 320.30189 (2000.0) a = 32.8696742 AU Inc. = 136.41410 n'= 0.00523011 q = 0.8079712 AU P = 188.449 years The past returns are as follows: [ T = 257 Apr. 25.63805 TT Epoch = 257 Apr. 24.0 TT Peri. = 19.01752 e = 0.9786710 Node = 319.35286 (2000.0) a = 37.3458366 AU Inc. = 135.47877 n'= 0.00431858 q = 0.7965482 AU P = 228.225 years ] [ T = 471 Mar. 13.79126 TT Epoch = 471 Mar. 12.0 TT Peri. = 19.15881 e = 0.9778488 Node = 319.53055 (2000.0) a = 36.0813027 AU Inc. = 135.87847 n'= 0.00454758 q = 0.7992441 AU P = 216.732 years ] [ T = 673 Jan. 30.64190 TT Epoch = 673 Feb. 19.0 TT Peri. = 19.35856 e = 0.9767453 Node = 319.66918 (2000.0) a = 34.7021371 AU Inc. = 136.12169 n'= 0.00482136 q = 0.8069873 AU P = 204.425 years ] [ T = 864 Nov. 1.94962 TT Epoch = 864 Oct. 14.0 TT Peri. = 19.47054 e = 0.9763122 Node = 319.66981 (2000.0) a = 34.1391085 AU Inc. = 136.25045 n'= 0.00494112 q = 0.8086801 AU P = 199.470 years ] [T = 1064 May 6.94229 TT Epoch = 1064 Apr. 27.0 TT Peri. = 19.71450 e = 0.9766832 Node = 319.94146 (2000.0) a = 34.5186399 AU Inc. = 136.16532 n'= 0.00485986 q = 0.8048654 AU P = 202.806 years ] [ T = 1256 June 3.70678 TT Epoch = 1256 May 29.0 TT Peri. = 19.83405 e = 0.9763360 Node = 319.99703 (2000.0) a = 34.0740526 AU Inc. = 136.26254 n'= 0.00495528 q = 0.8063269 AU P = 198.900 years ] [ T = 1454 Sept.22.92929 TT Epoch = 1454 Sept.27.0 TT Peri. = 19.94103 e = 0.9765224 Node = 320.19820 (2000.0) a = 34.2398520 AU Inc. = 136.15553 n'= 0.00491933 q = 0.8038712 AU P = 200.354 years ] [ T = 1645 Sept.26.41142 TT Epoch = 1645 Oct. 4.0 TT Peri. = 20.03463 e = 0.9759324 Node = 320.35870 (2000.0) a = 33.4410103 AU Inc. = 136.32055 n'= 0.00509665 q = 0.8048433 AU P = 193.383 years ] The predicted orbit for the 2012 return is as follows: T = 2012 Dec. 19.66213 TT Epoch = 2012 Dec. 19.0 TT Peri. = 20.17570 e = 0.9753206 Node = 320.43217 (2000.0) a = 32.8276929 AU Inc. = 136.40074 n'= 0.00524015 q = 0.8101667 AU P = 188.088 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(") 1827/ 121130 E27 1.1+ 0.3+ 121204 H06 0.2+ 0.2- 270621 030(99.0+ 39.1+) 121130 E27 1.1+ 0.0 121204 H06 0.0 0.0 270622 030(0.03+ 0.00-) 121130 E27 1.4+ 0.9+ 121204 H06 0.3- 0.5- 270623 030(0.05+ 0.01-) 121130 E27 0.8+ 0.2+ 121204 H06 0.5- 0.3+ 270629 030 28.6+ 26.5- 121130 E27 1.2+ 0.6+ 121204 H06 0.0 0.5+ 270629 030 20.4+ 0.0 121130 E27 1.4+ 0.0 121204 H06 0.2- 0.0 270629 030 27.6+ 11.1- 121130 E12 0.3+ 0.1- 121204 372 1.4- 0.1- 270629 030(17.5+ 61.3+) 121130 E12 0.3+ 0.4- 121204 372 1.6- 0.0 270701 030(53.2+ 12.1+) 121130 E12 0.1- 0.5+ 121204 372 1.5- 0.5+ 270701 030(52.6+ 6.8+) 121130 E12 0.1- 0.5+ 121204 372 1.1- 0.3- 270701 030(55.0+ 24.4+) 121130 E12 0.2+ 0.1+ 121204 372 1.5- 1.1+ 270701 030(52.9+ 31.2+) 121130 I39 0.1+ 0.5- 121204 E07 0.3+ 0.2- 270702 030(78.5+ 10.9+) 121130 I39 0.3- 0.1+ 121204 E07 0.2+ 0.6- 270702 030(94.4+ 27.1+) 121201 H47 0.2- 0.1- 121204 E07 0.4+ 0.7- 270703 030 23.1- 18.5- 121201 H47 0.0 0.7+ 121204 J24 1.3- 0.7+ 270703 030 26.9- 7.4- 121201 H47 0.2+ 0.1- 121204 J24 0.2- 0.5- 270703 030 6.2+ 6.1- 121201 H47 0.2+ 0.1+ 121204 I39 1.0- 0.5- 270703 030 0.6+ 18.6- 121201 I39 0.2+ 0.1- 121205 I39 0.7- 0.1+ 270703 030 1.1+ 5.0- 121201 I39 0.1- 0.0 121205 E07 0.2+ 0.1- 270703 030 9.4- 10.3- 121201 D88 1.1+ 0.2+ 121205 E07 0.7+ 0.4- 270704 030 3.9+ 29.3+ 121201 D88 0.8+ 0.6+ 121205 E07 0.3+ 0.5- 270704 030 3.7+ 27.9+ 121201 E27 (2.5+ 1.6+) 121205 E07 0.8- 0.1+ 270704 030 5.8+ 23.1+ 121201 E27 0.9+ 0.1+ 121205 E07 1.0+ 1.3- 270705 030 19.0+ 29.0+ 121201 I39 0.1+ 0.2- 121205 G26 1.4- 1.8+ 270705 030 12.3+ 17.3+ 121201 844 0.2- 0.1+ 121205 G26 0.6- 1.5+ 270706 020 46.6- 4.1- 121201 844 0.2- 0.3- 121205 G26 (3.5+ 1.4+) 270706 020(40.7- 68.3+) 121201 I39 0.3- 0.2- 121206 H06 0.4- 0.6- 270706 020 34.7- 43.2+ 121201 H47 0.5+ 0.8- 121206 H06 0.5- 0.0 270706 020 18.4- 11.2+ 121201 844 0.0 0.2- 121206 H06 0.4- 0.2+ 270706 030(16.9+ 57.0+) 121201 H47 0.1- 0.5- 121206 H06 0.2- 0.4+ 270706 030 32.5+ 7.0- 121202 H47 0.3- 0.4- 121206 H06 0.1- 0.2- 270706 030 5.2+ 15.1- 121202 H47 0.1+ 0.1- 121206 H06 0.2+ 0.1+ 270706 030 7.9+ 44.0- 121202 H47 0.2- 0.2+ 121206 H06 0.1+ 0.3+ 270706 030 3.6+ 5.5- 121202 H47 0.5- 0.2+ 121206 H06 0.3- 0.0 270712 030 1.5+ 2.9+ 121202 I39 0.0 0.1- 121206 H06 0.1- 0.1+ 270713 030 0.1+ 8.8+ 121202 I47 0.2- 0.3- 121206 H06 0.0 0.1+ 270713 030 14.3- 4.0- 121202 I47 0.8+ 0.7- 121206 D95 0.2+ 0.5- 270713 030 11.0+ 26.7+ 121202 I47 0.1- 0.2+ 121206 D95 0.7- 0.5- 270713 030 0.3- 7.0- 121202 I47 0.2- 0.2+ 121206 D95 (2.1- 1.5+) 270713 030 2.2+ 3.6+ 121202 I47 0.1+ 0.0 121206 372 0.4- 0.3+ 270713 030 7.2+ 0.1+ 121202 I47 0.4- 0.0 121206 372 0.2- 0.8+ 270713 030 3.4+ 5.4+ 121202 I47 0.5- 0.3- 121206 372 0.2- 0.9+ 270713 030 6.9- 10.6+ 121202 I47 0.3- 0.1+ 121206 372 0.5- 0.7+ 270714 030 6.6- 2.0+ 121202 I47 0.6- 0.2- 121206 E12 0.0 0.4- 270714 030 4.7+ 17.7+ 121202 I47 0.3- 0.1- 121206 E12 0.8- 0.3- 270715 030 22.3+ 32.4+ 121202 I47 0.4- 0.1- 121206 E12 0.2- 0.0 270715 030 26.0+ 34.0+ 121202 H06 0.5- 0.1+ 121206 E12 0.2+ 0.1- 270715 030 12.5+ 37.6+ 121202 H06 0.0 0.3+ 121206 E12 0.1+ 0.2- 270716 030 17.4+ 7.4+ 121202 I47 0.3- 0.1- 121208 H06 0.1- 0.0 270716 030 28.4+ 0.0 121202 I47 0.1+ 0.0 121208 H06 0.1- 0.4- 270716 030(28.0+ 58.2+) 121202 H06 0.6- 0.1- 121208 H06 0.0 0.1+ 270716 030 23.0+ 7.3- 121202 H06 0.3- 0.4+ 121208 H06 0.3- 0.1- 270717 030 19.7+ 6.9- 121202 I47 0.3- 0.4- 121208 H06 0.6- 0.4- 270717 030 2.0- 4.0+ 121202 H06 0.6- 0.2- 121208 H06 0.2- 0.2- 270717 030 7.9- 5.2- 121202 I47 0.2- 0.5- 121208 H06 0.4- 0.1+ 270718 030 15.5- 17.7+ 121202 H06 0.4- 0.1- 121208 349 0.5+ 0.9- 270718 030 15.4- 19.8+ 121202 I47 0.0 0.2+ 121208 349 1.0+ 0.4- 270718 030 16.0- 12.2+ 121203 I10 0.3- 0.2+ 121208 349 0.9+ 0.6- 270719 030 24.6+ 22.6- 121203 I10 0.2- 0.0 121208 900 0.3+ 0.3- 270719 030 27.4- 24.4- 121203 I10 0.0 0.3+ 121208 349 1.0+ 0.8- 270719 030 34.4- 46.2- 121203 H06 0.3- 0.0 121208 900 0.4+ 0.5+ 270719 030(21.2+ 93.0+) 121203 H06 0.1+ 0.3+ 121208 900 0.4+ 0.1+ 270719 030(0.01+ 0.03+) 121203 H06 0.3- 0.1+ 121209 349 0.2+ 0.2+ 270720 030 3.0- 7.6+ 121203 H06 0.6- 0.1- 121209 349 0.3+ 0.1- 270720 030 2.7+ 28.7+ 121203 H06 0.5- 0.1+ 121209 349 0.3+ 0.2- 270720 030 3.1+ 3.3+ 121203 H06 0.5- 0.0 121209 349 0.5+ 0.2- 270720 030 9.2- 4.2+ 121203 E07 0.1+ 0.3- 121209 349 0.7+ 0.3+ 270720 030 8.8+ 13.2+ 121203 E07 0.2- 0.3- 121209 349 0.3+ 0.1- 270721 030 1.8+ 4.9- 121203 E07 0.0 0.0 121210 372 0.3+ 0.4+ 270721 030 10.8+ 12.8- 121203 E12 0.9+ 0.1- 121210 372 0.0 0.6+ 270721 030 9.9+ 2.4+ 121203 E12 0.6- 0.3- 121210 372 0.1- 0.8+ 270721 030 2.1- 1.9- 121203 E07 0.5+ 0.4- 121210 372 0.0 0.6+ 2012/ 121204 I10 1.5+ 0.1- 121210 372 0.3+ 0.6+ 121129 E27 1.8+ 1.9- 121204 I10 1.4+ 0.3- 121129 E27 0.6+ 1.6+ 121204 I10 1.3+ 0.1- ( ) -------- Rejected Obs. Following observations were not included: 2012/ 121212 J24 0.8+ 0.2- 121216 349 0.6+ 0.4+ 121210 204 1.7+ 1.2+ 121213 367 0.1- 1.2+ 121216 349 0.5+ 0.5+ 121210 204 0.1+ 0.1+ 121213 367 0.1- 0.8+ 121216 349 0.1+ 0.1- 121210 204 1.2+ 0.8+ 121213 367 0.1- 1.8+ 121216 349 0.3+ 1.1+ 121210 204 0.2- 0.3- 121213 367 1.0+ 1.5+ 121217 370 1.2+ 1.0+ 121212 J24 1.1+ 0.4+ 121213 367 0.5+ 1.5+ 121217 370 0.8+ 0.9+ 121212 J24 0.1- 1.2+ 121216 349 0.8+ 0.8+ 121212 J24 1.1+ 0.5+ 121216 349 0.4+ 0.6+

Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2012 Dec. 13

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