Nakano Note (Nakano wa Kangaeru noda) NK 2366R P/Tombaugh-TENAGRA (1931 AN = 2003 WZ141 = 2012 WX32)
The following re-improved orbital elements from NK 2366, by S. Nakano, are from 129 observations 1931-2012 since additional observations were reported. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.67 arc second. 1931 AN was discovered by C. Tombaugh at Lowell. The past returns were 1931 Jan. 15 and 2004 Mar. 9. The residuals for 2003 observations were about 0.5 deg. with the delta-T correction = -1.05 days from my initial orbit of 2012 WX32. The comet has passed 1.17 AU from Jupiter on 1960 May 14 UT. See some notes on CBET 3342. Epoch = 2013 Mar. 9.0 TT T = 2013 Feb. 23.35143 +/- 0.00264 (m.e.) TT Peri. = 38.45910 +/- 0.00040 Node = 81.36251 +/- 0.00021 (2000.0) Inc. = 15.83797 +/- 0.00018 q = 2.4419039 +/- 0.0000224 AU e = 0.4400691 +/- 0.0000052 a = 4.3610808 +/- 0.0000131 AU n' = 0.10822133 +/- 0.00000049 P = 9.107 +/- 0.0000409 years T = 1931 Jan. 15.24344 TT Epoch = 1931 Jan. 19.0 TT Peri. = 34.47491 e = 0.4386988 Node = 85.67556 (2000.0) a = 4.3415035 AU Inc. = 16.19467 n'= 0.10895417 q = 2.4368913 AU P = 9.046 years [ T = 1940 Jan. 25.20592 TT Epoch = 1940 Jan. 12.0 TT Peri. = 34.59905 e = 0.4377784 Node = 85.56869 (2000.0) a = 4.3381318 AU Inc. = 16.17695 n'= 0.10908121 q = 2.4389914 AU P = 9.036 years ] [ T = 1949 Feb. 19.40378 TT Epoch = 1949 Feb. 13.0 TT Peri. = 34.76379 e = 0.4370524 Node = 85.47733 (2000.0) a = 4.3521063 AU Inc. = 16.15718 n'= 0.10855625 q = 2.4500077 AU P = 9.079 years ] [ T = 1958 Mar. 10.03190 TT Epoch = 1958 Mar. 18.0 TT Peri. = 34.79192 e = 0.4382665 Node = 85.41431 (2000.0) a = 4.3330493 AU Inc. = 16.17624 n'= 0.10927319 q = 2.4340188 AU P = 9.020 years ] [ T = 1967 June 17.57286 TT Epoch = 1967 May 30.0 TT Peri. = 37.10113 e = 0.4294165 Node = 85.18045 (2000.0) a = 4.4276692 AU Inc. = 16.05580 n'= 0.10578920 q = 2.5263549 AU P = 9.317 years ] [ T = 1976 Sept.17.28255 TT Epoch = 1976 Sept.19.0 TT Peri. = 39.12564 e = 0.4343103 Node = 83.74776 (2000.0) a = 4.3648581 AU Inc. = 16.07593 n'= 0.10808088 q = 2.4691551 AU P = 9.119 years ] [ T = 1985 Nov. 12.43719 TT Epoch = 1985 Dec. 1.0 TT Peri. = 39.18823 e = 0.4326257 Node = 83.69257 (2000.0) a = 4.3856960 AU Inc. = 16.04755 n'= 0.10731151 q = 2.4883311 AU P = 9.185 years ] [ T = 1995 Jan. 20.06945 TT Epoch = 1995 Jan. 3.0 TT Peri. = 39.43788 e = 0.4337869 Node = 83.54924 (2000.0) a = 4.3772274 AU Inc. = 16.04085 n'= 0.10762308 q = 2.4784435 AU P = 9.158 years ] T = 2004 Mar. 9.83518 TT Epoch = 2004 Mar. 16.0 TT Peri. = 39.52617 e = 0.4350106 Node = 83.57264 (2000.0) a = 4.3663835 AU Inc. = 16.04979 n'= 0.10802425 q = 2.4669604 AU P = 9.124 years The predicted orbit for the 2022 return is as follows: T = 2022 Apr. 8.47371 TT Epoch = 2022 Apr. 11.0 TT Peri. = 38.47084 e = 0.4393213 Node = 81.33927 (2000.0) a = 4.3754440 AU Inc. = 15.81538 n'= 0.10768888 q = 2.4532181 AU P = 9.152 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1931/ 121204 H06 0.3+ 0.8+ 121208 704 0.0 1.1+ 310111 690(22.2- 34.7+) 121204 H06 0.1- 0.8+ 121208 704 0.0 1.1+ 310111 690(18.7- 28.8+) 121204 G96 0.8- 0.0 121208 900 0.1+ 0.1+ 310111 690(22.1- 28.9+) 121204 G96 0.9- 0.1- 121208 900 0.2- 0.1- 310111 690(14.1- 21.0+) 121204 G96 1.3- 0.1- 121209 941 0.5+ 0.1+ 310112 690 (2.1- 6.6+) 121204 G96 1.3- 0.2- 121209 941 0.4+ 0.0 310112 690 0.9+ 0.4+ 121204 291 0.6- 1.1+ 121209 941 0.5+ 0.1+ 310112 690 2.6- 1.1+ 121204 291 0.6+ 0.4+ 121210 C32 0.1+ 0.3- 310112 690 2.1+ 3.1- 121204 291 0.3- 0.4+ 121210 C32 0.4+ 0.2- 310113 690 (1.6- 5.0+) 121205 213 0.3- 0.2- 121210 C32 0.3+ 0.1+ 310113 690 0.4+ 1.3+ 121205 213 0.4- 0.3- 121210 B75 0.1+ 0.5- 310113 690 2.7- 0.5+ 121205 213 0.2- 0.3- 121210 B75 0.9+ 0.0 310113 690 1.9+ 2.6- 121205 926 0.7- 0.2- 121210 B75 0.2+ 0.2+ 2003/ 121205 926 0.1- 0.1- 121211 C10 0.1+ 0.3+ 031121 704 0.1- 1.4- 121205 926 0.7- 0.0 121211 C10 0.4+ 0.1+ 031121 704 1.3+ 1.0- 121205 H45 0.0 0.1- 121211 C10 0.2- 0.0 031121 704 0.2+ 1.2- 121205 H45 0.4+ 0.0 121211 C23 0.1- 0.3+ 031121 704 0.3+ 0.9- 121205 H45 0.6+ 0.2+ 121211 C23 0.6+ 0.5+ 031121 704 1.2+ 0.0 121205 H45 0.5+ 0.2- 121211 C23 0.3+ 0.1- 031123 704 0.1+ 1.0- 121205 H45 0.5+ 0.5- 121212 B75 0.4+ 0.0 031123 704 0.1- 0.9- 121205 H45 0.2+ 0.1- 121212 B75 0.6+ 0.1+ 031123 704 1.6- 0.4- 121205 H45 0.3+ 0.1+ 121212 B75 0.7+ 0.4+ 031123 704 1.3- 0.7- 121205 H45 0.2+ 0.1- 121212 B75 0.3- 0.0 031123 704 0.5+ 1.0- 121205 H45 0.3+ 0.3- 121212 B75 0.2+ 0.4+ 031218 691 1.1- 1.5+ 121205 H45 0.1+ 0.4+ 121212 691 1.2- 0.2+ 031218 691 0.9+ 0.5+ 121205 C77 0.6- 0.2- 121212 691 1.4- 0.4+ 031218 691 0.7+ 0.4+ 121205 C77 0.2+ 0.0 121212 691 (2.7- 0.8+) 2012/ 121205 B70 0.0 0.1- 121212 704 0.2- 0.2+ 121127 926 0.1+ 0.0 121205 C77 0.2+ 0.0 121212 704 0.4+ 0.9+ 121127 926 0.0 0.4- 121205 C77 0.3+ 0.0 121212 704 0.1- 0.3+ 121127 926 (2.2- 0.5-) 121205 B70 0.0 0.0 121212 704 0.6- 0.3+ 121128 926 0.3- 0.4- 121205 B70 0.9+ 0.6+ 121212 704 0.6- 0.9+ 121128 926 0.4+ 0.0 121207 D95 0.6+ 0.2- 121212 G96 0.4- 0.0 121128 926 0.5+ 0.1- 121207 D95 0.1- 0.0 121212 G96 1.4- 0.2- 121203 926 1.1+ 1.3- 121207 D95 0.2+ 0.3- 121212 G96 1.1- 0.3- 121203 926 0.2+ 0.5- 121207 349 0.0 0.2- 121212 G96 1.1- 0.2- 121203 926 0.0 0.2+ 121207 349 0.2- 0.3+ 121213 H45 0.5+ 0.3+ 121203 926 0.4+ 0.1+ 121207 349 0.3- 0.5+ 121213 H45 0.1+ 0.2- 121203 926 0.2+ 0.2+ 121208 I57 0.4- 0.3- 121213 H45 0.4+ 0.5+ 121203 926 0.5+ 0.3+ 121208 I57 0.2+ 0.1- 121213 H45 0.2+ 0.2+ 121204 926 0.4- 0.3- 121208 I57 0.4+ 0.1+ 121213 H45 0.0 0.4+ 121204 926 0.4+ 0.4- 121208 691 1.0- 0.5- 121213 H45 0.2+ 0.1+ 121204 926 0.4- 0.3+ 121208 691 1.1- 0.0 121213 H45 0.3+ 0.6+ 121204 H06 0.6+ 0.3+ 121208 691 1.0- 0.3+ 121213 H45 0.4+ 0.4+ 121204 H06 0.6+ 0.5- 121208 704 0.3+ 0.5+ 121213 367 1.3- 0.4+ 121204 H06 0.9+ 0.5- 121208 704 0.7+ 0.5+ 121213 367 1.2- 0.9- 121204 H06 0.7+ 0.7+ 121208 704 0.2+ 0.1- ( ) -------- Rejected Obs. Following observations were not included: 2012/ 121218 H45 0.6+ 0.5+ 121220 703 2.5- 0.1- 121217 I81 0.4+ 0.4+ 121218 B51 0.5+ 1.3+ 121220 703 2.9- 0.4- 121217 I81 0.3+ 0.6+ 121218 B51 1.1+ 1.3+ 121220 703 2.7- 0.5- 121217 I81 0.4+ 0.8+ 121218 B51 0.1+ 0.8+ 121220 703 1.7- 0.3+ 121218 H45 0.7+ 0.4+ 121218 B51 0.4+ 0.4+ 121220 703 1.8- 0.3- 121218 H45 0.4+ 0.8+ 121219 I81 1.0+ 1.1+ 121220 703 0.5- 0.9- 121218 H45 0.7+ 0.4+ 121219 I81 0.1+ 1.0+ 121220 703 0.1- 0.5+ 121218 H45 0.6+ 0.2+ 121219 I81 0.0 0.5+ 121220 703 0.6- 0.1+ 121218 H45 0.7+ 0.4+ 121219 D95 0.2+ 0.3+ 121221 291 0.6+ 0.7+ 121218 H45 0.5+ 0.4+ 121219 D95 0.3+ 0.6+ 121221 291 0.7+ 0.6+ 121218 H45 0.6+ 0.6+ 121219 D95 0.1- 0.6+ 121221 291 0.8+ 0.6+
Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2012 Dec. 14