Nakano Note (Nakano wa Kangaeru noda) NK 4526 104P/Kowal 2
The following improved orbital elements, by S. Nakano, are from 201 observations 2003 to 2021, 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 +/- 0.95 arc seconds. Residuals for re-observations in 2021 were -0.32 deg for Right Ascension and -0.16 deg for Declination from NK 3170 (= HICQ 2020/2021) with the delta-T correction = +0.55 day. The comet has passed 0.30 AU from Jupiter on 2007 July 1 and 0.35 AU from Jupiter on 2019 May 30 UT. Also comet will pass 0.60 AU from Jupiter on 2031 July 24 UT. See the previous orbits in NK 356, NK 394, NK 449, NK 509, NK 621, NK 784, NK 960, NK 1023, NK 1457, NK 3046 and NK 3170. Epoch = 2022 Jan. 21.0 TT T = 2022 Jan. 11.66617 +/- 0.00118 (m.e.) TT Peri. = 227.24839 +/- 0.00080 Node = 207.22492 +/- 0.00075 (2000.0) Inc. = 5.70208 +/- 0.00014 q = 1.0731845 +/- 0.0000034 AU e = 0.6654289 +/- 0.0000015 a = 3.2076427 +/- 0.0000178 AU n' = 0.17156358 +/- 0.00000143 P = 5.745 +/- 0.0000479 years A1 = -0.181 +/- 0.029 A2 = +0.24384 +/- 0.00371 A3 = -0.42296 +/- 0.10052 T = 2004 May 9.07694 TT Epoch = 2004 Apr. 25.0 TT Peri. = 192.04039 e = 0.5854499 Node = 246.07527 (2000.0) a = 3.3669888 AU Inc. = 15.48781 n'= 0.15952971 q = 1.3957856 AU P = 6.178 years [ T = 2010 May 4.68868 TT Epoch = 2010 May 4.0 TT Peri. = 200.54625 e = 0.6383644 Node = 235.49124 (2000.0) a = 3.2613974 AU Inc. = 10.25432 n'= 0.16733951 q = 1.1794375 AU P = 5.890 years ] T = 2016 Mar. 28.14411 TT Epoch = 2016 Apr. 2.0 TT Peri. = 200.66246 e = 0.6385496 Node = 235.43029 (2000.0) a = 3.2623968 AU Inc. = 10.25429 n'= 0.16726262 q = 1.1791947 AU P = 5.893 years The predicted orbit for the 2027 return is as follows: T = 2027 Oct. 13.38624 TT Epoch = 2027 Oct. 2.0 TT Peri. = 227.36793 e = 0.6655804 Node = 207.14616 (2000.0) a = 3.2079166 AU Inc. = 5.70086 n'= 0.17154160 q = 1.0727903 AU P = 5.746 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2003/ 160328 A77 0.4- 0.6- 210818 Z10 0.7+ 0.3+ 030831 291 2.2- 1.2- 160328 A77 0.9- 0.5- 210826 A77 1.2+ 1.5+ 030831 291 1.9- 1.3- 160328 G40 1.5- 1.2- 210826 A77 1.3+ 1.7+ 030831 291 2.0- 2.3- 160328 G40 1.2- 1.1- 210826 A77 (2.3+ 1.2+) 030921 291 0.6+ 0.5+ 160328 G40 1.4- 1.0- 210827 X03 1.3+ 0.4+ 030921 291 0.8+ 0.7+ 160328 G40 1.1- 0.7- 210827 X03 1.1+ 0.6+ 030921 291 1.4+ 0.4+ 160330 I81 0.2+ 0.2- 210827 X03 0.9+ 0.6+ 030928 291 1.7+ 1.5+ 160330 I81 0.3+ 0.0 210828 Q11 0.8+ 0.3+ 030928 291 1.2+ 1.7+ 160330 I81 0.2+ 0.3- 210828 Q11 1.0+ 0.4+ 030928 291 1.5+ 0.9+ 160401 H45 0.9- 0.2- 210828 Q11 0.9+ 0.7+ 031117 360 (6.4- 5.2+) 160401 H45 1.2- 0.9- 210830 Q11 0.9+ 0.5+ 031117 360 (6.0- 6.1+) 160401 H45 0.7- 0.8- 210830 Q11 0.8+ 0.5+ 031117 360 (7.1- 5.6+) 160401 H45 0.8- 0.5- 210830 Q11 0.7+ 0.6+ 031123 360 (9.9- 6.5+) 160401 H45 1.1- 0.8- 210831 D29 1.0+ 0.0 031123 360(10.7- 5.3+) 160401 H45 0.8- 0.8- 210831 D29 1.2+ 0.3+ 031123 360 (8.8- 5.9+) 160403 I81 0.8+ 0.4+ 210831 D29 0.7+ 0.2+ 031208 204(14.7- 6.6+) 160403 I81 0.6+ 0.4+ 210901 215 0.6+ 0.7+ 031208 204(16.2- 5.6+) 160403 I81 1.2+ 0.3- 210901 215 0.2+ 0.4+ 031214 360(17.9- 4.9+) 160405 H45 0.2- 1.0- 210901 215 0.1+ 0.1+ 031214 360(18.2- 5.2+) 160405 H45 0.3- 0.5- 210902 K77 0.9- 0.4- 031214 360(19.7- 5.7+) 160405 H45 0.1+ 0.4- 210902 K77 1.3+ 0.8+ 2004/ 160405 H45 0.3- 0.8- 210903 703 1.8- 0.5+ 040105 204(31.3- 4.2+) 160405 H45 0.2+ 0.7- 210903 703 0.2- 0.3+ 040218 A33(67.0- 3.2-) 160405 H45 0.3+ 0.6- 210903 703 0.5+ 0.3- 040220 A33(67.0- 2.2-) 160405 367 0.5- 0.4- 210905 T05 0.6- 0.3+ 2005/ 160405 367 0.3- 0.5- 210905 T05 0.8+ 0.3- 050211 568(57.2- 4.3-) 160405 367 0.6- 0.3- 210905 T05 1.5+ 1.7+ 050211 568(57.1- 4.1-) 160409 A77 0.1- 0.6+ 210905 T05 0.4+ 0.4+ 050211 568(57.3- 4.4-) 160409 A77 0.1+ 1.3+ 210905 C47 0.6+ 0.1+ 2016/ 160409 A77 0.3+ 0.4+ 210905 C47 0.1- 0.3+ 160103 G40 2.0- 0.1- 160410 W96 0.3+ 1.1- 210907 703 0.3+ 1.2+ 160103 G40 2.0- 0.4+ 160410 W96 1.5+ 0.9- 210907 703 1.5+ 1.5+ 160103 G40 (2.7- 0.4-) 160410 W96 0.6+ 1.0+ 210907 703 0.9- 0.5- 160104 G40 1.6+ 1.5+ 160411 A77 1.1- 1.5+ 210907 703 1.1+ 0.5- 160104 G40 1.9+ 1.4+ 160411 A77 2.3+ 1.7+ 210907 T08 0.1+ 0.2+ 160104 G40 (3.0+ 2.1+) 160411 A77 (2.6+ 1.4+) 210907 T08 0.3+ 0.6+ 160107 G40 1.3+ 1.5+ 160412 A77 1.7+ 1.6+ 210907 T08 0.5+ 0.2- 160107 G40 1.9+ 1.6+ 160412 A77 1.7+ 0.9+ 210907 T08 0.8+ 0.0 160107 G40 (2.7+ 1.1+) 160414 A77 1.1+ 0.3- 210908 I81 0.1+ 0.1- 160110 G40 1.3+ 1.4+ 160414 A77 1.1+ 0.8- 210908 I81 0.3+ 0.4- 160110 G40 2.2+ 1.6+ 160414 A77 1.0+ 0.9- 210908 I81 0.5+ 0.5- 160110 G40 2.1+ 2.0+ 160419 C10 1.7+ 0.1- 210908 F51 0.2+ 0.1+ 160110 G40 1.3+ 1.6+ 160419 C10 1.3+ 1.8- 210908 F51 0.3+ 0.1+ 160110 G40 1.5+ 1.5+ 160421 H06 1.7+ 1.2- 210908 F51 0.2+ 0.0 160116 G40 1.5+ 0.3+ 160421 H06 0.8+ 0.1- 210909 G40 0.3+ 0.0 160116 G40 1.1+ 1.7+ 160422 G40 1.3+ 1.0- 210909 G40 0.4+ 0.2+ 160116 G40 (3.0+ 0.9+) 160422 G40 1.4+ 0.6- 210909 Q11 0.2+ 0.1+ 160116 G40 1.6+ 0.8+ 160422 G40 1.6+ 1.0- 210909 Q11 0.3+ 0.0 160125 215 0.5- 0.1+ 160427 A71 1.9+ 1.6- 210909 Q11 0.1+ 0.1+ 160125 215 0.9- 0.3- 160427 A71 2.2+ 1.4- 210910 G96 0.1- 0.4- 160125 215 1.5- 0.2- 160515 G40 (3.8+ 1.5-) 210910 G96 0.1+ 0.3- 160127 G40 0.4+ 0.0 160515 G40 (3.5+ 1.6-) 210910 G96 0.2- 0.2- 160127 G40 1.1+ 0.8+ 160516 G40 (4.1+ 1.4-) 210910 G96 0.2- 0.4- 160127 G40 0.6+ 0.7+ 160516 G40 (3.6+ 1.1-) 210911 G96 0.3- 0.6- 160127 G40 0.6- 0.6+ 160611 W88 (3.7+ 1.6-) 210911 G96 0.0 0.7- 160128 H06 0.2- 0.8+ 160611 W88 (4.4+ 2.0-) 210911 G96 0.4- 0.2- 160128 H06 0.4+ 0.7+ 160628 W88 (4.3+ 2.4-) 210911 G96 0.0 0.2- 160128 H06 1.0+ 1.0+ 160628 W88 (3.7+ 1.7-) 210911 703 0.1- 0.2- 160206 H06 0.7+ 0.2+ 2017/ 210911 703 1.0- 0.8- 160206 H06 0.2- 0.3+ 170419 G96 (2.8- 9.9+) 210911 703 1.6- 0.9- 160210 G40 0.4+ 0.1+ 170419 G96 (4.0- 10.5+) 210911 703 0.4+ 0.0 160210 G40 0.0 0.5- 170419 G96 (3.0- 9.8+) 210911 D29 0.5+ 0.4- 160210 G40 0.3+ 0.8+ 170419 G96 (4.0- 10.3+) 210911 D29 0.5- 0.5- 160211 A71 1.8- 0.5- 170430 G96 (4.1- 9.7+) 210911 D29 0.8- 0.5- 160211 A71 1.5- 0.5- 170430 G96 (3.1- 9.7+) 210913 F52 0.5- 0.7- 160224 A71 0.7- 1.8- 170430 G96 (4.0- 9.6+) 210913 F52 0.5- 0.7- 160224 A71 1.6- 1.9- 2021/ 210913 F52 0.4- 0.7- 160227 A71 0.9- 0.8- 210811 F51 0.3+ 0.5+ 210913 F52 0.7- 0.6- 160227 A71 1.2- 1.2- 210811 F51 0.0 0.7+ 210913 F52 0.5- 0.7- 160301 900 1.2- 1.0- 210811 F51 0.1+ 0.6+ 210913 F52 0.4- 0.6- 160301 900 0.5- 0.5- 210811 F51 0.1+ 0.6+ 210913 F52 0.4- 0.6- 160302 367 1.8- 0.9- 210811 J04 0.2+ 0.3+ 210913 F52 0.5- 0.8- 160302 367 0.8- 1.8- 210811 J04 0.1+ 0.3+ 210913 T05 0.2- 0.5- 160314 G40 2.2- 1.8- 210811 J04 0.2+ 0.5+ 210913 T05 0.7- 0.8- 160314 G40 1.7- 1.5- 210812 568 0.4+ 0.5+ 210913 T05 0.4- 0.3- 160314 G40 1.9- 1.1- 210812 568 0.4+ 0.5+ 210913 T05 1.0- 0.1- 160319 349 (3.0- 0.2-) 210812 568 0.4+ 0.5+ 210914 703 0.6- 0.6- 160319 349 (2.6- 0.3+) 210812 L81 0.6+ 0.8+ 210914 703 0.3- 1.0- 160321 349 (2.6- 0.1+) 210812 L81 0.1+ 0.6+ 210914 703 0.4- 1.4- 160321 349 (2.8- 0.1-) 210813 970 (2.1+ 1.7+) 210914 703 0.7- 0.7- 160325 H06 1.7- 1.0- 210813 970 0.4- 0.5+ 210915 B96 (2.6+ 2.9-) 160325 H06 1.5- 0.7- 210815 Q62 0.8+ 0.9+ 210915 B96 (4.5+ 1.7-) 160325 H06 2.0- 1.1- 210815 Q62 1.0+ 0.9+ 210915 B96 (0.1+ 6.3-) 160325 H06 2.1- 0.9- 210815 Q62 1.1+ 0.9+ 160328 A77 1.3- 1.1- 210818 Z10 0.2+ 0.5+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2021 Sept. 24