Nakano Note (Nakano wa Kangaeru noda) NK 5046 287P/Christensen
The following improved orbital elements, by S. Nakano, are from 248 observations 2006 to 2023, including planetary perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas, Vesta, and non-gravitational effect of sublimating molecule = CO (or N2) using Yabushita's theory (MN 283, 347). The mean residual is +/- 0.95 arc second. Residuals for 2023 July observations were -25" for Right Ascension and -5" for Declination from a linked orbit 2006-2022 in NK 4762 (= CH 2023) with the delta-T correction = +0.03 day. The comet will pass 0.91 AU from Jupiter on 2026 Nov. 21 UT. See the previous orbits in YC 2526, NK 1444, NK 2162, NK 2532, NK 2747, NK 4276 and NK 4762. Epoch = 2023 June 25.0 TT T = 2023 July 6.05540 +/- 0.00300 (m.e.) TT Peri. = 189.12251 +/- 0.00066 Node = 139.04079 +/- 0.00011 (2000.0) Inc. = 16.32216 +/- 0.00007 q = 3.0342670 +/- 0.0000015 AU e = 0.2711999 +/- 0.0000046 a = 4.1633734 +/- 0.0000262 AU n' = 0.11602084 +/- 0.00000110 P = 8.495 +/- 0.0000802 years Y1 = +0.777 +/- 0.202 Y2 = +0.21916 +/- 0.00080 Y3 = -1.30095 +/- 0.06852 T = 2006 June 15.04730 TT Epoch = 2006 July 4.0 TT Peri. = 188.83639 e = 0.2706518 Node = 139.15424 (2000.0) a = 4.1666182 AU Inc. = 16.31604 n'= 0.11588534 q = 3.0389156 AU P = 8.505 years T = 2014 Dec. 28.35219 TT Epoch = 2014 Dec. 9.0 TT Peri. = 189.06950 e = 0.2692165 Node = 139.05746 (2000.0) a = 4.1791725 AU Inc. = 16.30101 n'= 0.11536355 q = 3.0540701 AU P = 8.543 years The predicted orbit for the 2032 return is as follows: T = 2032 July 30.26114 TT Epoch = 2032 July 27.0 TT Peri. = 196.09934 e = 0.2180834 Node = 135.87060 (2000.0) a = 4.4071798 AU Inc. = 16.32120 n'= 0.10652779 q = 3.4460471 AU P = 9.252 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2006/ 061001 423 0.1- 0.7+ 151010 F51 0.2- 0.6+ 060830 699 2.2- 1.3+ 061001 423 0.6+ 0.1- 151012 F51 0.1+ 0.8+ 060830 699 (2.3- 0.0 ) 061007 585 0.6- 0.4+ 151012 F51 0.1- 0.7+ 060830 699 1.4- 0.0 061007 204 2.1- 2.0+ 151012 F51 0.1- 0.7+ 060830 699 2.0- 1.7+ 061010 423 1.4+ 0.3+ 151013 F51 0.0 0.8+ 060914 703 0.0 0.0 061010 423 (1.8+ 3.0+) 151013 F51 0.1- 0.8+ 060914 703 0.1- 1.3- 061010 415 1.7+ 0.3+ 151013 F51 0.0 0.8+ 060914 703 1.1- 0.9- 061010 415 0.5+ 0.3+ 151013 F51 0.0 0.8+ 060914 703 0.9+ 1.0- 061011 673 1.3+ 0.7- 151017 G45 0.1+ 1.3+ 060914 703 0.4- 1.1- 061011 673 0.9+ 0.6- 151017 G45 1.7- 2.0+ 060914 703 0.0 0.1- 061011 673 0.9+ 0.5- 151017 G45 1.2- 1.3+ 060914 703 0.7- 0.3- 061011 673 0.5+ 0.8- 151017 G45 (2.8- 1.8+) 060914 703 0.6- 0.3- 061011 423 0.7+ 1.9+ 151017 G45 1.4- 1.8+ 060914 E12 0.0 0.1+ 061011 423 0.0 0.8+ 151017 G45 (2.1- 2.3+) 060915 844 0.7- 0.6- 061012 423 0.1- 1.7+ 151017 G45 0.0 1.2+ 060915 844 1.4- 0.4+ 061012 423 1.4+ 1.5+ 151101 F51 0.2- 1.3+ 060915 844 1.0- 0.1+ 061013 423 1.3+ 1.3+ 151101 F51 0.1- 0.9+ 060915 844 0.6- 0.7- 061013 423 0.8+ 0.6+ 151101 F51 0.1- 1.0+ 060915 I77 (2.5- 0.1-) 061018 423 (0.7+ 2.3+) 151101 F51 0.1- 1.0+ 060915 850 0.3- 1.2+ 061027 703 0.2+ 1.5+ 151110 G45 1.9- 2.1+ 060915 I77 0.5- 0.7+ 061027 703 0.6+ 1.7+ 151110 G45 0.9- 2.2+ 060915 844 1.4- 0.4+ 061027 703 0.1- 1.3+ 151110 G45 (0.7- 2.9+) 060915 I77 0.1- 1.1+ 061029 415 0.6+ 0.2+ 151110 G45 (0.9- 2.7+) 060915 850 0.3+ 0.2+ 061029 415 0.5+ 0.0 151207 F51 0.3+ 1.8+ 060915 850 1.4- 1.1+ 061110 673 0.8+ 0.1- 151207 F51 0.2+ 1.9+ 060915 854 0.7- 0.3+ 061110 673 1.0+ 0.0 151207 F51 0.4+ 1.7+ 060915 854 0.3+ 1.4+ 061110 673 0.9+ 0.4+ 151207 F51 0.2+ 2.0+ 060915 703 0.3- 0.6+ 061110 673 1.4+ 0.6+ 2016/ 060915 703 0.2+ 0.0 061111 G96 0.9+ 0.8- 161222 F51 (5.0+ 8.8+) 060915 703 0.2- 0.7- 061111 G96 1.2+ 0.6- 161222 F51 (4.8+ 8.6+) 060915 854 1.1- 0.6+ 061111 G96 0.8+ 0.7- 161222 F51 (4.8+ 8.7+) 060915 703 0.5- 0.7- 061111 G96 0.1- 0.1- 2022/ 060915 423 0.8- 0.4+ 061112 130 (3.0+ 0.3-) 220513 G96 (0.1- 2.1+) 060915 423 0.0 1.5+ 061115 215 (2.5+ 1.8+) 220513 G96 (0.3+ 3.1+) 060915 E12 0.4- 0.7+ 061216 G96 1.9- 0.8- 220513 G96 (0.1- 2.7+) 060915 E12 1.1- 0.1+ 061216 G96 0.9+ 0.3- 220513 G96 (0.4+ 2.6+) 060915 E12 0.8- 0.6+ 2007/ 220514 G96 (0.1- 2.8+) 060915 E12 1.6- 0.2+ 070108 G96 0.3+ 0.9- 220514 G96 (0.3+ 2.7+) 060915 E12 0.1- 0.8+ 070108 G96 0.7- 0.6- 220514 G96 (0.3- 3.7+) 060915 E12 1.2- 0.6+ 070108 G96 0.4- 0.3+ 220514 G96 (0.3+ 3.8+) 060915 E12 1.0- 0.1- 2013/ 220529 G96 (0.0 2.5+) 060915 E12 0.2+ 0.7+ 130601 291(17.4+ 1.1+) 220529 G96 (0.2+ 2.4+) 060915 E12 0.8- 0.8+ 130601 291(17.1+ 0.4+) 220529 G96 (0.4+ 2.5+) 060915 E12 0.6- 0.4- 130601 291(16.7+ 0.5+) 220529 G96 (0.4+ 2.5+) 060916 415 0.1- 0.5- 130604 291(17.2+ 0.1-) 220529 G96 (0.0 2.4+) 060916 415 0.9- 0.1- 130604 291(17.3+ 0.1-) 220529 G96 (0.0 2.3+) 060917 415 0.0 0.6+ 130604 291(17.6+ 0.2+) 220618 W62 0.6+ 1.1+ 060917 415 0.2- 0.3- 2014/ 220618 W62 0.9+ 2.1+ 060917 213 0.5- 0.3- 140331 Q62 1.1+ 0.7- 220618 W62 0.6+ 2.1+ 060917 213 0.1+ 0.1- 140331 Q62 0.5+ 0.7- 220619 W62 0.8+ 2.0+ 060917 213 0.2+ 0.0 140331 Q62 0.6- 0.9- 220619 W62 0.5+ 2.1+ 060918 349 0.8- 1.2+ 140507 F51 0.8+ 0.8- 220619 W62 0.5+ 0.9+ 060918 349 1.2- 0.9+ 140507 F51 0.8+ 0.8- 220629 D29 0.4+ 2.2+ 060918 349 1.0- 1.3+ 140507 F51 0.8+ 0.8- 220629 D29 0.1+ 1.6+ 060919 213 0.2- 1.2+ 140622 F51 0.2+ 1.3- 220629 D29 1.1- 1.7+ 060919 213 0.1- 1.0+ 140622 F51 0.3+ 1.2- 220704 F52 0.5+ 1.8+ 060919 213 0.1- 1.1+ 140622 F51 0.2+ 1.3- 220704 F52 0.5+ 1.8+ 060920 673 0.1- 0.0 140718 215 1.4- 0.1+ 220704 F52 0.6+ 1.8+ 060920 673 0.4+ 0.0 140718 215 0.9- 0.0 220704 F52 0.5+ 1.6+ 060920 673 0.9+ 0.3+ 140718 215 0.5- 0.5- 220707 X03 0.3+ 1.5+ 060920 703 0.3+ 0.2+ 140731 D95 0.1- 1.1- 220707 X03 0.7+ 1.6+ 060920 703 0.8+ 0.7+ 140731 D95 0.7+ 0.3- 220707 X03 1.3+ 1.5+ 060920 703 0.5- 0.3- 140731 D95 0.2- 1.1- 220720 F52 0.5+ 1.7+ 060920 703 0.2- 1.0+ 140914 D95 0.5- 0.3- 220720 F52 0.4+ 1.4+ 060921 215 0.4- 0.7- 140914 D95 0.2- 0.2- 220720 F52 0.5+ 1.6+ 060921 585 1.4+ 0.9+ 140914 D95 0.1+ 0.1+ 220720 F52 0.4+ 1.4+ 060921 585 1.2+ 0.4- 140917 F51 0.3- 0.7- 220726 F52 0.5+ 1.7+ 060921 585 (3.2- 0.6+) 140917 F51 0.4- 0.6- 220726 F52 0.3+ 1.5+ 060921 585 0.9- 1.5- 140917 F51 0.3- 0.7- 220726 F52 0.4+ 1.7+ 060921 585 (2.7- 0.8+) 141018 215 1.3- 0.1+ 220726 F52 0.3+ 1.4+ 060921 246 0.9+ 0.5+ 141018 215 1.2- 0.2- 220803 215 0.7+ 1.9+ 060921 246 0.0 1.2+ 141018 215 0.8- 0.4- 220803 215 1.4+ 1.2+ 060921 246 0.1- 1.3+ 141109 F51 1.3- 0.7- 220803 215 0.5+ 1.8+ 060921 246 0.0 1.6+ 141109 F51 1.2- 0.7- 220819 F51 0.1+ 1.2+ 060921 246 0.1+ 0.4+ 141109 F51 1.2- 0.6- 220819 F51 0.0 1.1+ 060921 246 0.4+ 0.3+ 141109 F51 1.2- 0.7- 220819 F51 0.0 1.2+ 060923 349 0.4+ 0.9+ 2015/ 220819 F51 0.2+ 1.2+ 060923 349 0.4+ 0.7+ 150620 Q62 (2.8- 0.7-) 220820 F51 0.2+ 1.2+ 060923 349 0.7+ 1.0+ 150620 Q62 (2.9- 0.7-) 220820 F51 0.3+ 1.2+ 060923 585 (2.8+ 1.5+) 150620 Q62 (2.3- 0.7-) 220820 F51 0.1+ 1.2+ 060923 585 0.6- 0.7- 150813 215 1.1- 0.2- 220820 F51 0.1+ 1.3+ 060923 585 0.3- 0.8+ 150813 215 1.2- 0.3+ 2023/ 060923 585 0.7+ 1.6- 150813 215 1.7- 0.4+ 230511 Q62 1.3- 1.5- 060923 585 0.3- 0.0 150908 F51 0.6- 0.2+ 230511 Q62 0.7- 1.4- 060924 608 0.1- 0.0 150908 F51 0.4- 0.2+ 230511 Q62 1.1- 1.6- 060924 608 0.3+ 0.0 150908 F51 0.3- 0.3+ 230523 Q11 0.5- 0.3- 060924 608 0.6+ 1.1+ 150908 F51 0.5- 0.4+ 230523 Q11 0.2- 0.6- 060924 423 0.1+ 0.4+ 150915 G45 (2.3- 1.1+) 230525 Q62 (0.3- 4.3-) 060924 423 0.6+ 0.7+ 150915 G45 (2.9- 0.7+) 230525 Q62 (1.7- 2.4-) 060925 415 0.5+ 0.7+ 150915 G45 1.7- 1.2+ 230616 Q62 0.7+ 1.8- 060925 415 0.6+ 0.4+ 150915 G45 (2.3- 0.0 ) 230616 Q62 0.3+ 2.0- 060926 703 0.3- 1.1+ 150915 G45 1.3- 0.5- 230616 Q62 0.1+ 1.7- 060926 703 0.6- 2.1+ 150915 G45 1.9- 0.9+ 230629 215 0.6+ 1.9- 060926 703 0.1+ 1.1+ 150915 G45 1.4- 0.6+ 230629 215 (0.7+ 2.6-) 060926 703 0.8- 2.2+ 151003 G96 0.2- 1.3+ 230629 215 (0.5+ 2.3-) 060927 423 0.4+ 1.0+ 151003 G96 1.1- 1.1+ 230704 X03 (1.0- 2.7-) 060927 423 0.3+ 0.5+ 151003 G96 1.6- 1.7+ 230704 X03 0.3+ 1.0- 060927 204 0.3+ 0.6+ 151003 G96 1.1- 1.4+ 230704 X03 0.1+ 2.2- 060928 204 0.5+ 0.5+ 151010 F51 0.2- 0.8+ 230712 Q62 0.9+ 2.2- 060928 423 0.6+ 0.1- 151010 F51 0.2- 0.8+ 230712 Q62 1.0+ 2.2- 060928 423 1.2+ 0.6+ 151010 F51 0.1- 0.7+ 230712 Q62 1.3+ 1.9- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2023 Aug. 2