Nakano Note (Nakano wa Kangaeru noda) NK 4549 P/Tenagra (2012 TK8 = 2021 Sx)

The following improved orbital elements, by S. Nakano, are from 68 observations 2012 to 2021. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.41 arc second. Residuals for the recovery observations were +5'.9 for Right Ascension and +0'.4 for Declination from the prediction in NK 2685 (= HICQ 2020/2021) with the delta-T correction = -0.38 day. The comet has passed 0.72 AU from Jupiter on 1983 Jan. 14 UT. See the previous orbits in NK 2456, NK 2612 and NK 2685. Epoch = 2021 Nov. 2.0 TT T = 2021 Oct. 25.70805 +/- 0.00415 (m.e.) TT Peri. = 128.03139 +/- 0.00091 Node = 288.96571 +/- 0.00027 (2000.0) Inc. = 6.33997 +/- 0.00001 q = 2.9954405 +/- 0.0000045 AU e = 0.2742119 +/- 0.0000009 a = 4.1271557 +/- 0.0000082 AU n' = 0.11755140 +/- 0.00000035 P = 8.384 +/- 0.0000250 years T = 2013 May 10.57375 TT Epoch = 2013 May 28.0 TT Peri. = 128.20732 e = 0.2620587 Node = 289.72361 (2000.0) a = 4.1886048 AU Inc. = 6.29547 n'= 0.11497410 q = 3.0909444 AU P = 8.572 years The predicted orbit for the 2030 return is as follows: T = 2030 Mar. 27.89477 TT Epoch = 2030 Apr. 9.0 TT Peri. = 128.27057 e = 0.2729671 Node = 288.88502 (2000.0) a = 4.1426502 AU Inc. = 6.33180 n'= 0.11689251 q = 3.0118429 AU P = 8.432 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2012/ 121020 A71 0.6- 0.0 121117 C32 0.5+ 0.7+ 121006 926 0.0 0.0 121020 A71 0.9- 0.8- 121117 C32 0.3+ 0.8+ 121006 926 0.2- 0.2- 121020 246 0.5+ 0.7+ 121117 C32 0.2- 0.5+ 121006 926 0.2- 0.1+ 121020 246 0.2+ 1.0+ 121125 C10 (5.6+ 1.6+) 121008 G96 0.8- 0.4- 121020 246 0.2+ 0.8+ 121125 C10 (3.8+ 2.4+) 121008 G96 0.6- 0.2- 121020 246 0.0 1.2- 2013/ 121008 G96 0.4- 0.3- 121020 246 0.1+ 0.2- 130206 291 0.2- 0.3+ 121008 G96 0.6- 0.4- 121020 246 0.9+ 0.0 130206 291 0.2- 0.6+ 121009 F51 0.2- 0.1- 121020 C32 0.1- 0.1- 130206 291 0.0 0.6+ 121009 F51 0.1- 0.0 121020 C32 0.3+ 0.2- 131228 926 0.1+ 0.1+ 121009 F51 0.2- 0.0 121020 130 0.3- 0.1+ 131228 926 0.4- 0.7- 121009 F51 0.1- 0.0 121020 C32 0.5+ 0.3+ 131230 926 0.4- 0.0 121015 G96 0.6- 0.6- 121020 C32 0.5+ 0.1+ 131230 926 0.5- 0.2- 121015 G96 0.0 0.3- 121020 130 0.1- 0.1- 131230 926 0.2- 0.6+ 121015 G96 0.5- 0.5- 121021 372 0.2+ 0.1+ 2014/ 121015 G96 0.5- 0.6- 121021 372 0.1+ 0.0 140402 926 1.2+ 0.2+ 121017 568 0.0 0.0 121021 372 0.4- 0.2- 140402 926 0.7+ 0.1- 121017 568 0.0 0.0 121022 C10 0.4+ 0.1- 2021/ 121017 568 0.0 0.0 121022 C10 0.6- 1.2- 210930 Z84 0.3- 0.4- 121019 H06 0.4+ 0.4- 121104 F51 0.1+ 0.2+ 210930 Z84 0.1- 0.0 121019 H06 0.2+ 0.0 121104 F51 0.2+ 0.2+ 210930 Z84 0.4+ 0.2+ 121019 H06 0.2- 0.4+ 121104 F51 0.1+ 0.1+ 211001 Z84 0.2- 0.2- 121020 H06 0.1- 0.1- 121107 215 1.0+ 0.3- 211001 Z84 0.2+ 0.2- 121020 H06 0.1- 0.4- 121107 215 1.4+ 0.3- 211001 Z84 0.0 0.2+ 121020 H06 0.2+ 0.3- 121107 215 1.8+ 0.2- ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2021 Oct. 1

Back to Nakano Note Page