Nakano Note (Nakano wa Kangaeru noda) NK 3951 266P/Christensen
The following improved orbital elements, by S. Nakano, are from 245 observations 2008 to 2019, including planetary perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas, Vesta, and non-gravitational effect of style II. The mean residual is +/- 0.79 arc second. Residuals for 2019 October observations were around -90" for Right Ascension and -30" for Declination from the prediction by T. Kobayashi in NK 3404 (= HICQ 2018/2019) with the delta-T correction = +0.07 day. See the previous orbits in NK 1469, NK 1643, NK 2330, NK 2619 and NK 3404. Epoch = 2020 Apr. 21.0 TT T = 2020 Apr. 19.52591 +/- 0.00390 (m.e.) TT Peri. = 97.85158 +/- 0.00105 Node = 5.00393 +/- 0.00024 (2000.0) Inc. = 3.42574 +/- 0.00003 q = 2.3352334 +/- 0.0000023 AU e = 0.3394999 +/- 0.0000005 a = 3.5355535 +/- 0.0000043 AU n' = 0.14825794 +/- 0.00000027 P = 6.648 +/- 0.0000122 years A1 = +0.121 +/- 0.528 A2 = +0.52943 +/- 0.01557 T = 2013 Aug. 31.62563 TT Epoch = 2013 Aug. 16.0 TT Peri. = 98.00962 e = 0.3410814 Node = 5.05148 (2000.0) a = 3.5330784 AU Inc. = 3.42714 n'= 0.14841376 q = 2.3280112 AU P = 6.641 years The predicted orbit for the 2026 return is as follows: T = 2026 Dec. 7.42153 TT Epoch = 2026 Dec. 26.0 TT Peri. = 97.84941 e = 0.3413253 Node = 4.94299 (2000.0) a = 3.5285387 AU Inc. = 3.42808 n'= 0.14870027 q = 2.3241590 AU P = 6.628 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2008/ 130210 349 0.2+ 1.8+ 140226 F51 0.4+ 0.1+ 080414 G96 0.4- 0.1- 130210 349 0.6+ 1.2+ 140226 F51 0.4+ 0.0 080414 G96 0.1- 0.1- 131002 H06 0.1- 0.0 140226 F51 0.5+ 0.0 080414 G96 0.1- 0.6- 131002 H06 0.4- 0.5- 140226 F51 0.4+ 0.1+ 080414 G96 0.3+ 0.2+ 131008 703 (2.8- 2.2+) 140226 C23 0.4+ 0.3- 080430 G96 0.7+ 0.1- 131008 703 (5.1- 0.8+) 140226 C23 0.3+ 0.2- 080430 G96 0.4- 0.3- 131008 703 1.6- 0.2- 140226 C23 0.5- 1.6+ 080430 G96 0.4- 0.5- 131008 703 0.7+ 0.9- 140227 H15 0.7+ 0.1- 080430 G96 0.5- 0.7- 131111 H06 0.0 0.6- 140227 H15 0.3+ 0.3+ 2012/ 131111 H06 0.1- 0.7- 140227 H15 0.3- 0.2+ 120815 188 0.6- 0.8+ 131111 H06 0.1+ 0.2- 140227 H15 0.4+ 0.0 120815 188 0.5- 1.1+ 131211 C10 1.8- 0.2+ 140227 D90 0.8+ 0.3- 120815 188 0.3- 0.8+ 131211 C10 0.2- 0.2+ 140227 D90 0.0 0.7+ 120815 188 0.3- 0.9+ 131211 C10 0.7+ 0.0 140227 D90 0.1- 0.5- 120828 188 0.7- 0.2+ 131214 215 1.0- 0.4+ 140301 G45 0.1- 1.1+ 120828 188 0.9- 0.2+ 131214 215 1.1- 0.1+ 140301 G45 0.3+ 0.0 120828 188 0.8- 0.2+ 131214 215 1.1- 0.2- 140301 G45 0.0 0.1+ 120828 188 0.8- 0.3+ 131226 D29 0.0 0.4+ 140301 G45 0.4- 0.1- 120828 188 0.7- 0.3+ 131226 D29 0.4- 0.2+ 140301 G45 0.2+ 0.2- 120915 J04 0.5- 1.2+ 131226 D29 1.1- 1.1- 140301 G45 0.3- 0.0 120915 J04 0.2+ 0.1- 131229 349 0.5- 0.7+ 140301 G45 0.4+ 0.0 120915 J04 0.9- 0.3+ 131229 349 0.7- 0.5+ 140301 G45 0.2- 0.1- 120915 J04 0.9- 1.0+ 2014/ 140305 703 0.2+ 1.1+ 120917 188 1.7- 0.4+ 140106 D95 0.7- 0.0 140305 703 1.6- 1.9+ 120917 188 1.8- 0.3+ 140106 D95 2.1- 0.5- 140305 703 1.3- 0.4- 120917 188 1.7- 0.5+ 140107 D90 0.4- 0.4- 140306 C23 1.1+ 1.3+ 120917 188 1.6- 0.4+ 140107 D90 0.4- 0.4- 140306 C23 0.4- 1.2+ 121009 F51 0.0 0.9+ 140107 D90 0.6+ 0.2- 140306 C23 0.1- 0.6- 121009 F51 0.1- 0.6+ 140110 C23 0.4- 0.3- 140306 691 0.3+ 0.2+ 121009 F51 0.1- 0.7+ 140110 C23 0.8- 0.5+ 140306 691 0.1- 0.0 121009 F51 0.2- 0.6+ 140110 D95 1.4- 1.8+ 140306 691 0.0 0.0 121010 703 1.0- 1.2+ 140110 D95 (2.5- 2.0-) 140308 585 0.6+ 1.1+ 121010 703 1.2- 0.9+ 140112 349 0.9- 0.3+ 140308 585 0.5+ 0.7+ 121010 703 (2.4- 0.9+) 140112 349 1.7- 1.3+ 140308 585 0.7+ 1.0+ 121010 703 (3.3- 1.5+) 140125 D90 0.1+ 0.6- 140308 585 0.3+ 0.6+ 121014 691 0.8- 0.6+ 140125 D90 0.5+ 0.0 140308 585 0.4+ 0.8+ 121014 691 0.9- 0.8+ 140125 D90 0.1- 0.1- 140308 585 0.5+ 0.8+ 121014 691 1.0- 0.9+ 140128 J43 0.2+ 1.1+ 140308 585 0.1+ 0.8+ 121015 F51 0.2- 0.4+ 140128 J43 0.4- 0.0 140308 585 0.2+ 0.6+ 121015 F51 0.1- 0.3+ 140128 J43 0.6- 0.2- 140308 585 0.1- 0.6+ 121015 F51 0.2- 0.5+ 140128 J43 0.2- 0.1- 140308 585 0.0 0.9+ 121015 F51 0.2- 0.3+ 140128 G96 1.4- 0.2+ 140308 585 0.0 1.1+ 121021 703 2.0- 0.7- 140128 G96 1.3- 0.3+ 140308 585 0.0 1.2+ 121021 703 1.2- 0.1+ 140128 G96 0.8- 0.5+ 140311 B96 1.4+ 0.7+ 121021 703 0.9- 2.0+ 140128 G96 0.9- 0.1- 140311 B96 1.6+ 0.7+ 121021 703 1.8- 1.8+ 140129 J43 0.3- 0.1+ 140320 703 1.8+ 1.2+ 121023 G96 0.7- 1.1+ 140129 J43 0.1- 0.2+ 140320 703 1.9+ 1.1+ 121023 G96 0.1+ 0.5+ 140129 J43 0.2+ 0.0 140320 703 0.6+ 0.9- 121023 G96 1.0- 1.0+ 140129 J43 0.3- 0.2+ 140320 703 0.5+ 0.9- 121023 G96 0.1- 0.4+ 140204 C23 (2.2- 1.2-) 140322 C23 1.0+ 0.5- 121023 G96 0.6- 1.0+ 140204 C23 0.3+ 0.4+ 140322 C23 0.4- 0.7+ 121023 G96 0.4- 0.4+ 140204 D90 0.4+ 0.1- 140322 C23 1.1+ 0.2- 121023 G96 0.4- 1.0+ 140204 D90 0.2- 0.6+ 140328 215 0.5+ 0.5+ 121023 G96 0.4+ 1.2+ 140204 D90 1.1- 0.1+ 140328 215 0.3+ 0.8+ 121104 F51 0.2- 0.6+ 140208 Q62 0.0 0.5+ 140328 215 0.3+ 1.1+ 121104 F51 0.2- 0.5+ 140208 Q62 0.1- 0.5+ 140502 G96 0.5+ 0.3- 121104 F51 0.2- 0.5+ 140209 G96 0.1+ 0.5+ 140502 G96 0.9+ 0.8+ 121105 H06 0.4- 0.6+ 140209 G96 0.5- 0.5+ 140502 G96 1.6+ 0.9+ 121105 H06 0.4- 0.7+ 140209 G96 0.3- 0.2+ 140502 G96 1.4+ 0.6+ 121105 H06 0.8- 0.5+ 140209 G96 0.2- 0.3+ 2019/ 121109 H36 0.9+ 0.8+ 140219 691 1.1- 0.9+ 190811 F51 0.4+ 1.7- 121109 H36 0.2- 0.7+ 140219 691 0.2- 0.5+ 190811 F51 0.3+ 1.7- 121109 H36 0.7+ 0.2+ 140219 691 0.5- 0.3+ 190811 F51 0.3+ 1.8- 121109 H36 1.8+ 0.0 140220 I41 0.3+ 0.1+ 190907 G96 0.6+ 1.8- 121207 A32 0.5+ 1.4+ 140220 I41 0.1- 0.4+ 190907 G96 0.2+ 2.0- 121207 A32 0.5+ 0.7+ 140220 I41 0.5+ 0.0 190907 G96 0.8- 1.9- 121207 A32 0.5+ 0.2+ 140220 I41 0.1+ 0.3+ 190907 G96 0.1+ 2.1- 121210 C32 1.9- 1.1+ 140220 D90 0.5+ 0.1- 190930 A77 0.3+ 2.1- 121210 C32 1.9- 0.5+ 140220 D90 0.5+ 0.5- 190930 A77 1.1+ 1.8- 121212 130 0.5- 0.8- 140220 D90 (3.1- 1.5-) 190930 A77 0.3+ 1.4- 121212 130 1.0+ 0.1+ 140221 I41 0.3+ 0.4+ 191010 A77 0.3+ 1.9- 2013/ 140221 I41 0.4+ 0.0 191010 A77 0.4+ 1.9- 130122 703 0.0 0.6+ 140222 I41 0.8- 0.6+ 191010 A77 0.1- 2.1- 130122 703 0.6- 0.4+ 140222 I41 0.3+ 0.1+ 191023 A77 0.3+ 1.7- 130122 703 0.1+ 0.2- 140222 I41 0.2- 0.2+ 191023 A77 0.2+ 1.9- 130122 703 0.6- 0.3- 140222 I41 0.4+ 0.1+ 191023 A77 0.6+ 2.0- 130205 H06 0.4+ 0.7+ 140222 I41 0.3+ 0.7+ 191026 215 (0.0 2.2-) 130205 H06 0.1+ 0.3+ 140222 I41 0.2+ 0.1+ 191026 215 (1.0+ 2.9-) 130205 H06 0.2+ 0.3+ 140222 I41 0.5+ 0.1- 191026 215 0.8+ 1.8- 130206 703 0.4+ 0.5+ 140222 I41 0.7+ 0.5+ 191027 H06 (0.5+ 2.9-) 130206 703 0.3+ 1.4+ 140223 I41 0.0 0.5+ 191027 H06 (0.4+ 3.4-) 130206 703 0.7+ 0.5+ 140223 I41 0.2+ 0.2+ 191028 J22 1.3+ 1.6- 130206 703 0.5+ 1.5+ 140223 I41 0.1+ 0.3+ 191028 J22 1.1+ 2.1- 130210 F51 0.0 0.0 140223 I41 0.0 0.4+ 191028 J22 1.8+ 2.1- 130210 F51 0.0 0.1- 140223 I41 0.2+ 0.0 191203 A77 1.1+ 0.8- 130210 F51 0.1- 0.1- 140223 I41 0.2+ 0.2+ 191203 A77 1.2+ 1.5- 130210 F51 0.1+ 0.0 140223 I41 0.3+ 0.2- 191203 A77 1.4+ 1.1- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2019 Dec. 7