Nakano Note (Nakano wa Kangaeru noda) NK 5025 323P/SOHO
The following improved orbital elements, by S. Nakano, are from 133 observations 2012 to 2021, including planetary perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas, Vesta, and non-gravitational effect of style II. The weighting mean residual is +/- 0.42 arc second. The comet has passed 0.27 AU from Jupiter on 2015 Feb. 13 and will pass 0.28 AU from Jupiter on 2026 Dec. 8 UT. Also the comet has made close approaches 0.061 AU to Earth on 2000 Jan. 12 and 0.034 AU to Mars on 2004 May 19 UT. See the previous orbits in NK 1774, NK 3011 and NK 3657. Epoch = 2021 Jan. 26.0 TT T = 2021 Jan. 17.63125 +/- 0.00001 (m.e.) TT Peri. = 353.17349 +/- 0.00019 Node = 324.22973 +/- 0.00018 (2000.0) Inc. = 5.36988 +/- 0.00003 q = 0.0392063 +/- 0.0000002 AU e = 0.9848136 +/- 0.0000000 a = 2.5816711 +/- 0.0000141 AU n' = 0.23760342 +/- 0.00000194 P = 4.148 +/- 0.0000340 years A1 = 0.0 assumed A2 = -0.00222 +/- 0.00001 T = 2012 Aug. 20.16464 TT Epoch = 2012 Aug. 21.0 TT Peri. = 353.40978 e = 0.9814063 Node = 323.88878 (2000.0) a = 2.6120777 AU Inc. = 6.22283 n'= 0.23346669 q = 0.0485682 AU P = 4.222 years T = 2016 Nov. 23.63477 TT Epoch = 2016 Nov. 28.0 TT Peri. = 353.12062 e = 0.9846275 Node = 324.27664 (2000.0) a = 2.5838377 AU Inc. = 5.33064 n'= 0.23730464 q = 0.0397200 AU P = 4.153 years The predicted orbit for the 2025 return is as follows: T = 2025 Mar. 14.07614 TT Epoch = 2025 Mar. 26.0 TT Peri. = 353.12655 e = 0.9846136 Node = 324.27996 (2000.0) a = 2.5836690 AU Inc. = 5.32679 n'= 0.23732788 q = 0.0397534 AU P = 4.153 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2012/ 161123 249 7.1+ 5.1+ Y 210213 568 0.0 0.1- 120819 249 0.1+ 2.7- Y 161123 249 3.7- 10.8+ Y 210213 568 0.0 0.0 120819 249 11.2- 18.2+ Y 161123 249 2.3+ 2.1+ Y 210213 568 0.0 0.1- 120820 249 0.8+ 0.4+ Y 161123 249 0.6+ 0.1- Y 210213 568 0.0 0.0 120820 249 3.0- 3.6- Y 161123 249 4.4+ 15.4+ Y 210213 568 0.0 0.0 120820 249 0.5+ 4.9+ Y 161123 249 6.4+ 7.4+ Y 210213 568 0.2+ 0.0 120820 249 2.0+ 9.1- Y 161123 249(25.8+ 85.4+)Y 210216 G37 0.4+ 0.3+ 120820 249 11.7+ 0.5- Y 161123 249(30.1+ 40.9+)Y 210216 G37 0.3+ 0.2+ 120820 249 11.3+ 10.4- Y 161123 249 (0.6- 34.0+)Y 210216 G37 0.1+ 0.0 120820 249 9.9+ 7.2- Y 161123 249 1.5+ 23.5- Y 210216 G37 0.4+ 0.1+ 120820 249 17.2+ 11.3- Y 161123 249(35.5- 39.5+)Y 210216 G37 0.2+ 0.1+ 120820 249 6.7+ 9.8- Y 161123 249(13.2- 36.0+)Y 210217 T14 0.1- 0.0 120820 249 2.9+ 5.7- Y 161123 249 20.9- 1.4- Y 210217 T14 0.1- 0.1- 120820 249(25.0+ 20.1-)Y 161123 249(28.9+ 18.1-)Y 210217 T14 0.0 0.0 120820 249 21.0+ 9.5- Y 161123 249 3.9- 15.9+ Y 210303 G37 0.2+ 0.0 120820 249 0.0 10.2- Y 161123 249 (9.5- 33.5+)Y 210303 G37 0.1+ 0.0 120820 249 9.5+ 4.4+ Y 161123 249(18.6- 68.2+)Y 210303 G37 0.0 0.1+ 120820 249(55.3- 6.5-)Y 161123 249 (2.6+ 28.7+)Y 210303 G37 0.1+ 0.1- 120820 249 12.9- 17.5- Y 161123 249(20.0+ 34.7+)Y 210303 G37 0.0 0.1+ 120820 249(27.8- 15.4-)Y 161123 249(18.8- 59.2+)Y 210303 G37 0.2+ 0.1+ 120820 249 9.8- 19.3+ Y 2020/ 210303 G37 0.0 0.1+ 120820 249(0.03+ 0.07-)Y 201221 568 0.7- 0.4+ 210303 G37 0.0 0.0 120820 249(29.6- 12.6-)Y 201221 568 0.9- 0.2+ 210303 G37 0.0 0.1+ 120820 249(45.4- 28.1-)Y 201221 568 0.9- 0.4+ 210303 G37 0.0 0.1- 120820 249 20.9- 8.8+ Y 201221 568 1.0- 0.4+ 210303 G37 0.1+ 0.1- 120820 249 4.3- 9.0+ Y 2021/ 210303 G37 0.2- 0.3+ 120820 249(0.04+ 0.02-)Y 210206 T14 0.0 0.0 210303 G37 0.3+ 0.2+ 120820 249(48.9+ 10.4-)Y 210207 T14 0.1+ 0.0 210303 568 0.1- 0.1- 120820 249 (1.0+ 40.3-)Y 210207 T14 0.1- 0.0 210303 568 0.0 0.1- 120820 249 14.4- 2.5+ Y 210207 T14 0.0 0.0 210303 568 0.1- 0.0 120820 249(16.8+ 46.6-)Y 210208 T14 0.1+ 0.0 210303 568 0.1- 0.1- 120820 249 15.9- 8.2- Y 210208 T14 0.0 0.1- 210303 568 0.0 0.0 120820 249(41.5+ 28.4-)Y 210208 T14 0.1+ 0.1+ 210303 568 0.1+ 0.0 2016/ 210210 T14 0.1- 0.0 210303 568 0.1- 0.0 161123 249 0.3- 4.0+ Y 210210 T14 0.0 0.1- 210303 568 0.1- 0.0 161123 249 1.8+ 8.9+ Y 210210 T14 0.1- 0.0 210303 568 0.0 0.0 161123 249 12.2+ 7.4- Y 210211 T14 0.1- 0.0 210303 568 0.1- 0.0 161123 249 11.9+ 1.0- Y 210211 T14 0.0 0.0 210303 568 0.1- 0.0 161123 249 2.4+ 8.1+ Y 210211 T14 0.1+ 0.0 210303 568 0.2- 0.1+ 161123 249 2.6+ 3.0- Y 210211 T14 0.1+ 0.0 210303 568 0.0 0.1+ 161123 249 4.3+ 4.6+ Y 210212 T14 0.1- 0.1- 210303 568 0.0 0.0 161123 249 5.8+ 2.0- Y 210212 T14 0.1- 0.0 210303 568 0.1+ 0.0 161123 249 2.9- 1.1+ Y 210212 T14 0.1- 0.1- 210303 568 0.0 0.1+ 161123 249 9.0+ 0.8+ Y 210213 T14 0.0 0.0 210303 568 0.2- 0.0 161123 249 2.9+ 0.3+ Y 210213 T14 0.1+ 0.0 210303 568 0.1+ 0.0 161123 249 7.2+ 5.5+ Y 210213 T14 0.0 0.0 210303 568 0.1+ 0.0 161123 249 0.5- 0.4+ Y 210213 568 0.0 0.1- 210303 568 0.0 0.1- 161123 249 5.0+ 1.1- Y 210213 568 0.1+ 0.1+ 210303 568 0.1- 0.0 161123 249 2.6+ 4.2+ Y 210213 568 0.1+ 0.1- 210303 568 0.1- 0.0 161123 249 3.6+ 1.9- Y 210213 568 0.1- 0.2- 210303 568 0.0 0.0 161123 249 2.9+ 0.6+ Y 210213 568 0.1- 0.0 210303 568 0.1+ 0.0 161123 249 4.2+ 2.7+ Y 210213 568 0.1- 0.1- 210303 568 0.1- 0.0 161123 249 0.3+ 4.1+ Y 210213 568 0.1- 0.1- 210303 568 0.0 0.0 ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2023 June 3