Nakano Note (Nakano wa Kangaeru noda) NK 3899 289P/Blanpain
The following improved orbital elements, by S. Nakano, are from 108 observations 2003 observations after close approach to Earth 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 +/- 0.63 arc second. Residuals on re-observations in 2019 were -72" for Right Ascension and -14" for Decliantion from the prediction in NK 2539 (=HICQ 2018/2019) with the delta-T correction = +0.016 day. The comet will pass 0.091 AU and 0.084 AU from Earth on 2020 Jan. 11 and 2035 Nov. 6 UT, respectively. See the previous orbits in NK 1168, NK 2535 and NK 2539 (= HICQ 2018/2019). Epoch = 2019 Dec. 23.0 TT T = 2019 Dec. 20.99123 +/- 0.00020 (m.e.) TT Peri. = 9.84795 +/- 0.00010 Node = 68.92326 +/- 0.00017 (2000.0) Inc. = 5.89756 +/- 0.00001 q = 0.9588852 +/- 0.0000003 AU e = 0.6852956 +/- 0.0000003 a = 3.0469394 +/- 0.0000027 AU n' = 0.18531405 +/- 0.00000024 P = 5.319 +/- 0.0000070 years A1 = -0.159 +/- 0.008 A2 = -0.00963 +/- 0.00031 T = 2003 Dec. 11.57743 TT Epoch = 2003 Dec. 27.0 TT Peri. = 9.06998 e = 0.6755861 Node = 69.38209 (2000.0) a = 3.0826950 AU Inc. = 5.92918 n'= 0.18209929 q = 1.0000691 AU P = 5.412 years T = 2009 Apr. 30.60013 TT Epoch = 2009 May 9.0 TT Peri. = 9.80921 e = 0.6836469 Node = 68.96363 (2000.0) a = 3.0507826 AU Inc. = 5.89551 n'= 0.18496399 q = 0.9651246 AU P = 5.329 years T = 2014 Aug. 28.22726 TT Epoch = 2014 Aug. 11.0 TT Peri. = 9.85388 e = 0.6846763 Node = 68.93758 (2000.0) a = 3.0472050 AU Inc. = 5.90001 n'= 0.18528982 q = 0.9608560 AU P = 5.319 years The predicted orbit for the 2025 return is as follows: T = 2025 Apr. 14.29921 TT Epoch = 2025 Mar. 26.0 TT Peri. = 9.88110 e = 0.6864773 Node = 68.89175 (2000.0) a = 3.0439264 AU Inc. = 5.90051 n'= 0.18558927 q = 0.9543400 AU P = 5.311 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2003/ 040130 703 0.8- 0.6- 130707 Q62 (1.4- 2.1-) 031220 H41 0.3- 0.4- 040130 703 0.5- 0.9+ 130707 Q62 (0.5- 2.6-) 031220 H41 0.0 0.4+ 040130 703 0.7- 0.6- 130707 Q62 1.2+ 0.8- 031220 H41 0.3- 0.5+ 040130 703 0.6- 0.3+ 130707 Q62 (2.2+ 1.3-) 031220 H41 0.2- 0.1- 040131 704 0.5- 0.3+ 130707 367 1.8+ 1.0- 031220 H41 0.1- 0.4+ 040131 704 0.6- 0.1+ 130707 367 (4.2+ 0.9-) 031220 H41 0.2- 0.5+ 040131 704 1.4- 0.0 130707 Q68 0.0 0.5+ 031220 H41 0.0 0.0 040131 704 0.5- 0.8+ 130707 300 0.2+ 0.1- 031220 H41 0.4- 0.7+ 040131 704 0.1- 0.4+ 130707 300 0.6+ 0.9- 031220 379 (0.6- 2.0-) 040131 645 0.2- 0.1- 130707 300 0.8- 1.1- 031220 379 0.9- 0.1+ 040131 645 0.1+ 0.3- 130707 Q68 1.9+ 0.2- 031220 379 0.5+ 1.2- 040131 645 0.2+ 0.0 130708 Q62 0.7+ 0.3+ 031220 379 0.5- 0.2- 040131 645 0.0 0.1+ 130708 Q62 0.4- 0.3+ 031224 H41 0.4+ 0.5- 040202 704 0.4+ 1.1+ 130708 372 0.0 0.4+ 031224 H41 1.0+ 0.3- 040202 704 1.0+ 1.1+ 130708 372 1.6+ 0.7- 031224 H41 1.1- 0.2+ 040202 704 0.3+ 0.1- 130708 349 0.8+ 0.6+ 031224 H41 1.8+ 1.3- 040202 704 0.5+ 0.1+ 130708 372 0.0 1.1- 031224 H41 1.8- 1.2+ 040210 644 0.2+ 0.1- 130708 349 1.5+ 0.3- 031224 H41 (1.8+ 2.6-) 040210 644 0.3+ 0.4+ 130708 349 0.3+ 0.7+ 031224 H41 1.1+ 0.3- 040210 644 0.2+ 0.2- 130708 349 0.2+ 0.5+ 031224 H41 0.8+ 0.5+ 040214 704 0.1- 0.6- 130708 372 1.3+ 0.9- 031226 H41 0.6+ 0.5- 040214 704 0.9- 0.9+ 130708 372 1.0+ 0.3- 031226 H41 0.1+ 0.5- 040214 704 0.4+ 0.7+ 130709 367 0.5- 0.5- 031226 H41 0.1- 0.0 040214 704 0.5- 0.3- 130709 367 1.6+ 0.8+ 031226 H41 0.1+ 0.5- 040214 704 0.5- 0.1- 130717 W96 (3.0+ 1.1-) 031231 H41 0.9- 0.3+ 040320 291 0.1- 0.1+ 130717 W96 (1.4- 2.3-) 031231 H41 0.0 0.5- 040320 291 0.2+ 0.2- 2014/ 031231 H41 (0.8- 2.1-) 040320 291 0.6+ 0.0 140615 D95(13.3+ 12.0+) 031231 H41 0.6+ 0.3- 2013/ 140615 D95(11.7+ 12.3+) 2004/ 130704 F51 0.1- 0.1- 2015/ 040104 704 0.7+ 0.1+ 130704 F51 0.1- 0.1+ 150412 Z27 (7.5+ 0.7+) 040104 704 0.1+ 0.5+ 130705 568 0.2- 0.1+ 150412 Z27(11.0+ 0.2-) 040104 704 0.5- 0.4+ 130705 568 0.3- 0.1+ 150518 G30(18.5+ 10.3-) 040104 704 0.7+ 0.2- 130705 568 0.3- 0.0 150518 G30(14.4+ 6.1-) 040110 130 0.2+ 0.2+ 130705 568 0.4- 0.1+ 150518 G30(17.4+ 8.6-) 040110 130 0.1- 0.7- 130705 568 0.1- 0.1+ 150518 G30(18.2+ 4.5-) 040111 644 0.4+ 0.2- 130705 Q62 0.1- 1.3- 2019/ 040111 644 0.4+ 0.6- 130705 Q62 0.4+ 1.3- 190922 Q62 0.1- 0.2- 040111 644 0.4+ 0.2- 130705 Q62 1.1+ 1.2- 190922 Q62 0.1+ 0.0 040119 704 0.6+ 0.2+ 130706 Q62 0.0 1.0- 190922 Q62 0.2+ 0.2+ 040119 704 0.6- 0.2- 130706 Q62 0.1+ 1.2- 190925 Q11 0.4- 0.2- 040119 704 0.2+ 0.2+ 130706 Q62 0.1+ 1.5- 190925 Q11 0.4+ 0.3+ 040119 704 0.1- 0.2- 130707 E07 0.3+ 0.3- 190925 Q11 0.3- 0.0 040119 704 0.6+ 0.8+ 130707 E07 0.1+ 0.0 ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2019 Sept. 30