Nakano Note (Nakano wa Kangaeru noda) NK 4200 184P/Lovas 2

The following improved orbital elements, by S. Nakano, are from 280 observations 1986 to 2020. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.72 arc second. Residuals of re-observations on 2020 June 29 were +12" for Right Ascension and +5" for Declination from the prediction by T. Kobayashi in NK 3428 (= HICQ 2020) with the delta-T correction = -0.005 day. The comet has passed 0.27 AU from Jupiter on 2015 Nov. 5 UT. See the previous orbits in NK 650, NK 946, NK 1412 (= YC 2542), NK 1912, NK 2538 and NK 3428. Epoch = 2020 Nov. 7.0 TT T = 2020 Oct. 26.18662 +/- 0.00005 (m.e.) TT Peri. = 186.43691 +/- 0.00008 Node = 173.25455 +/- 0.00007 (2000.0) Inc. = 4.57335 +/- 0.00002 q = 1.7032616 +/- 0.0000005 AU e = 0.5509342 +/- 0.0000001 a = 3.7928998 +/- 0.0000014 AU n' = 0.13342801 +/- 0.00000007 P = 7.387 +/- 0.0000041 years T = 1986 Sept. 2.25343 TT Epoch = 1986 Sept. 7.0 TT Peri. = 71.39129 e = 0.5927640 Node = 283.76180 (2000.0) a = 3.5821427 AU Inc. = 1.52950 n'= 0.14537501 q = 1.4587777 AU P = 6.780 years [ T = 1993 June 12.98802 TT Epoch = 1993 June 22.0 TT Peri. = 71.44511 e = 0.5919307 Node = 283.69270 (2000.0) a = 3.5861556 AU Inc. = 1.52803 n'= 0.14513106 q = 1.4633999 AU P = 6.791 years ] [ T = 2000 Mar. 24.89660 TT Epoch = 2000 Apr. 6.0 TT Peri. = 71.61242 e = 0.5933513 Node = 283.56666 (2000.0) a = 3.5772984 AU Inc. = 1.52986 n'= 0.14567040 q = 1.4547037 AU P = 6.766 years ] T = 2006 Dec. 12.44914 TT Epoch = 2006 Dec. 11.0 TT Peri. = 77.38873 e = 0.6041164 Node = 278.31520 (2000.0) a = 3.5245367 AU Inc. = 1.55309 n'= 0.14895361 q = 1.3953064 AU P = 6.617 years T = 2013 July 28.46835 TT Epoch = 2013 Aug. 16.0 TT Peri. = 78.06381 e = 0.6042389 Node = 277.74307 (2000.0) a = 3.5223552 AU Inc. = 1.55146 n'= 0.14909200 q = 1.3940111 AU P = 6.611 years The predicted orbit for the 2028 return is as follows: T = 2028 Mar. 23.94984 TT Epoch = 2028 Mar. 10.0 TT Peri. = 186.52795 e = 0.5494463 Node = 173.20638 (2000.0) a = 3.8048473 AU Inc. = 4.56770 n'= 0.13280004 q = 1.7142880 AU P = 7.422 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1986/ 130819 H45 2.2+ 0.3+ 131127 130 0.8+ 0.1- 861130 561(12.8- 5.0+) 130819 H45 1.3+ 0.3+ 131127 130 0.2+ 0.3- 861130 561 (5.5- 1.6+) 130819 H45 (2.7+ 0.3+) 131127 130 0.1+ 0.7+ 861202 801 (3.2- 8.5+) 130819 H45 1.7+ 0.7+ 131127 130 0.2- 0.5+ 861202 691 0.1- 1.2- 130824 J87 0.5+ 0.1- 131128 G96 0.5- 0.2+ 861202 691 0.2+ 0.9- 130824 J87 0.8+ 0.2- 131128 G96 0.1- 0.1- 861202 691 0.0 1.9- 130824 J87 1.0+ 0.1- 131128 G96 0.2+ 0.2+ 861202 892(11.4- 6.6-)Y 130831 461 0.8+ 0.2+ 131128 G96 0.4+ 0.2+ 861202 892(11.4- 8.6-)Y 130831 461 0.7+ 0.3+ 131129 A77 1.5+ 0.6- 861203 372 (1.3+ 3.5-) 130831 461 0.6+ 0.4+ 131129 A77 (0.5+ 3.2+) 861203 323 0.2+ 1.9- 130901 H06 0.2+ 0.5+ 131129 160 0.4- 0.3- 861203 372 0.1+ 2.1- 130901 H06 0.7+ 0.2+ 131129 160 0.9- 0.3- 861203 561 (8.0- 6.2+) 130901 H06 1.5+ 0.1+ 131129 160 1.2- 0.1+ 861204 688 (0.3+ 3.8-) 130903 B83 (5.3- 5.1+) 131203 691 1.1- 0.7+ 861204 688 (4.4+ 7.6-) 130903 B83 (5.0- 6.6-) 131203 691 1.1- 0.1- 861204 688 (5.8+ 1.7+) 130904 215 1.2+ 0.1+ 131203 691 0.1- 0.4+ 861204 688 1.7+ 1.8- 130904 215 0.2+ 0.4- 131203 213 0.2+ 0.0 861204 691 0.2- 0.4- 130904 215 0.0 0.6- 131203 213 1.0+ 2.0+ 861204 691 1.1- 0.7- 130904 160 0.2+ 0.2- 131203 213 0.7+ 0.4+ 861204 691 0.5+ 1.2- 130904 160 1.1+ 0.4- 131203 J01 0.0 0.5+ 861204 892 (1.1+ 4.6-) 130904 160 1.9+ 0.7- 131203 J01 0.1- 0.3+ 861204 892 2.7+ 1.3- 130912 J01 0.0 0.0 131203 J01 0.1+ 0.3- 861204 372(11.9+ 0.2-)Y 130912 J01 0.3- 0.2- 131203 K25 0.1+ 0.2+ 861205 801 (0.8+ 4.0-) 130912 H45 0.5+ 0.2+ 131203 K25 0.1- 1.3+ 861205 373 1.8- 0.8+ 130912 H45 0.4+ 1.2+ 131204 C23 0.5+ 0.3- 861205 373 (3.0- 4.2-) 130912 H45 1.0+ 1.0+ 131204 C23 0.3- 0.4+ 861205 399 (1.6- 3.8-) 130912 H45 0.5+ 0.8+ 131204 C23 0.3- 0.6- 861206 399 1.9+ 1.1- 130912 H45 0.8+ 0.4+ 131204 A32 0.0 0.0 861207 372 0.9- 0.5+ Y 130914 H45 0.5- 0.0 131204 A32 0.9+ 0.7+ 1987/ 130914 H45 0.0 0.2- 131205 K25 0.9+ 0.1- 870103 691 (4.1+ 3.2-) 130914 H45 0.1+ 0.2+ 131205 K25 0.0 0.2+ 870103 691 0.8+ 1.1- 130914 H45 0.6- 0.4- 131206 585 0.4- 0.4+ 870103 691 (1.0+ 2.8-) 130914 H45 0.2+ 0.7- 131206 585 0.3- 0.4+ 870125 691 0.9+ 2.1- 130914 H45 0.1+ 0.6- 131206 585 0.4- 0.8+ 870125 691 0.9+ 0.0 130915 H45 0.6+ 0.2+ 131206 585 0.2- 0.5+ 870125 691 0.8+ 1.7- 130915 H45 0.6+ 0.4- 131206 585 0.3+ 0.8+ 870130 691 1.1+ 1.4- 130915 H45 0.4+ 0.4- 131206 585 0.5+ 0.1+ 870130 691 0.6+ 1.7- 130915 H45 0.2+ 0.2- 131206 585 0.2+ 0.1+ 870130 691 0.1+ 1.9- 130915 H45 0.2+ 0.4- 131206 585 0.4+ 0.0 870301 691 1.2+ 1.2- 130915 H45 0.2- 0.4- 131206 585 0.7+ 0.1+ 870301 691 1.3+ 0.6+ 130921 160 1.2- 0.3+ 131206 Z81 1.1- 0.5+ 870303 691 1.8+ 1.9- 130921 160 1.0- 0.0 131207 I72 0.3+ 1.1+ 870303 691 1.8+ 0.4- 130924 160 0.8- 0.2- 131207 I72 (4.5- 0.0 ) 2007/ 130924 160 0.4+ 0.1- 131207 I72 0.0 0.0 070109 703 1.3+ 1.0+ 130924 160 0.0 0.3+ 131207 Z81 0.2+ 0.4+ 070109 703 (2.4+ 0.6+) 131003 H06 0.1+ 0.9+ 131207 Z81 0.1+ 0.5+ 070109 703 (2.3+ 0.1+) 131003 H06 0.1+ 0.5+ 131207 104 0.2+ 0.1+ 070109 703 0.4+ 0.7- 131003 H06 0.2- 0.2+ 131207 104 0.4+ 0.4+ 070109 G96 0.0 0.3- 131007 I81 0.5- 0.3+ 131207 104 0.5+ 0.3- 070109 G96 0.4- 0.3- 131007 I81 1.9- 0.6+ 131210 G96 0.5+ 0.7+ 070109 G96 0.3- 0.5- 131011 N27 0.7- 0.5+ 131210 G96 0.2+ 1.2+ 070109 G96 0.7- 0.1- 131011 N27 0.2- 0.2+ 131210 703 0.1+ 0.8+ 070110 G96 0.9- 0.1+ 131011 N27 0.9- 0.1+ 131210 G96 0.5+ 0.6+ 070110 G96 0.3- 0.2- 131011 N27 0.5- 0.5+ 131210 G96 0.5+ 0.6+ 070110 G96 0.2+ 0.3+ 131011 N27 0.4+ 0.4+ 131210 703 0.9+ 0.0 070110 734 0.1- 0.0 131011 N27 0.1- 0.5+ 131210 703 0.6- 0.7- 070110 734 0.7- 0.6- 131012 C32 0.2- 0.2+ 131210 703 0.4- 0.9+ 070110 734 0.8- 1.6- 131012 C32 0.2- 0.2+ 131210 104 0.5+ 0.0 070110 854 1.2- 0.3+ 131012 C32 0.0 0.3+ 131210 104 2.0+ 0.4+ 070110 854 0.8- 0.7+ 131013 349 1.4- 0.2+ 131210 104 1.5+ 0.4- 070110 854 0.3+ 0.3+ 131013 349 0.9- 0.1- 131211 104 0.2+ 0.0 070111 372 0.1+ 0.6- 131014 C32 0.4- 0.0 131212 104 0.5+ 0.3- 070113 215 1.0+ 1.4+ 131014 C32 0.9- 0.0 131212 104 0.9+ 0.3+ 070113 232 (3.1+ 2.2-) 131014 C32 0.5- 0.0 131216 160 1.7+ 1.1- 070113 232 2.1+ 1.0- 131016 G40 (2.4- 0.7-) 131216 160 1.9+ 0.3- 070113 232 (2.7+ 1.3-) 131016 G40 1.7- 0.4- 131224 585 1.6+ 0.3- 070114 349 0.6+ 1.3- 131019 585 0.6- 0.0 131224 585 1.9+ 0.4- 070114 349 0.4- 0.5- 131019 585 0.5- 0.1- 131224 585 0.2+ 1.4+ 070115 703 0.3+ 0.5+ 131019 585 0.4- 0.0 2014/ 070115 703 0.0 1.0+ 131019 585 0.1- 0.3- 140103 691 0.2- 0.7+ 070115 703 0.1- 0.1+ 131019 585 0.2- 0.1- 140103 691 0.3- 0.6+ 070115 703 0.3- 0.5+ 131019 585 0.3- 0.1- 140103 691 0.4- 0.7+ 070115 703 0.5- 0.7- 131019 585 0.3- 0.1+ 2020/ 070115 703 0.0 0.5- 131019 585 0.4- 0.1+ 200629 F51 0.7+ 0.4+ 070115 703 0.9+ 0.8+ 131019 585 0.4- 0.2+ 200629 F51 0.8+ 0.1+ 070115 703 1.1- 0.0 131019 585 0.9- 0.1+ 200629 F51 0.9+ 0.3+ 070115 703 1.9- 0.4- 131019 585 0.5- 0.0 200629 F51 0.9+ 0.4+ 070115 703 0.6- 1.2- 131019 585 0.5- 0.0 200718 Q68(20.3- 12.7-) 070115 703 0.5+ 0.7- 131025 H47 1.4- 0.4- 200718 Q68(27.4- 10.1-) 070115 703 0.9- 0.4- 131025 H47 0.5- 0.7- 200808 F51 0.0 0.1- 070120 J76 0.1- 1.3- 131025 C35 2.1- 0.0 200808 F51 0.0 0.0 070120 J76 (3.0+ 0.8+) 131025 C35 1.8- 0.1- 200808 F51 0.0 0.1+ 070120 J76 0.3- 0.0 131026 C35 0.9- 0.5- 200810 F52 0.0 0.1- 2013/ 131026 J01 0.6- 0.4+ 200810 F52 0.0 0.0 130604 W86 (5.3+ 1.6+) 131026 J01 0.9- 0.0 200810 F52 0.2- 0.2- 130604 W86 (4.9+ 2.1+) 131026 J01 1.1- 0.1- 200810 F52 0.1- 0.1+ 130604 W86 (4.6+ 2.0+) 131027 C23 1.0+ 0.1+ 200812 F51 0.1- 0.0 130703 Q62 (3.4+ 1.4+) 131027 C23 0.0 0.8+ 200812 F51 0.1- 0.0 130703 Q62 (3.5+ 1.1+) 131027 J24 0.7- 0.1- 200812 F51 0.1- 0.0 130703 Q62 (3.8+ 1.1+) 131027 J24 0.3- 0.4+ 200812 F51 0.1- 0.0 130712 Q62 (3.0+ 1.1+) 131027 J24 1.2- 0.7+ 200812 T05 0.1- 0.2- 130712 Q62 (2.8+ 1.0+) 131027 J24 (2.4- 0.5-) 200812 T05 0.1+ 0.8+ 130712 Q62 (2.6+ 0.9+) 131028 C47 0.7- 0.2+ 200812 T05 0.0 0.1- 130801 D90 0.5- 0.2+ 131029 C47 0.0 0.1+ 200812 T05 0.1+ 0.5- 130801 D90 1.6- 0.3- 131110 J01 0.5+ 0.9+ 200814 Q11 0.7- 0.3- 130801 D90 (4.2+ 1.3+) 131110 J01 0.5- 0.0 200814 Q11 0.7- 0.5- 130802 461 1.7+ 0.6+ 131110 J01 0.4- 0.4+ 200815 215 0.5- 0.1+ 130802 461 (2.3+ 2.0+) 131123 213 0.0 0.3+ 200815 215 0.4- 0.1- 130803 H06 0.1+ 0.2- 131123 213 0.6- 0.9+ 200815 215 0.2- 0.4- 130803 H06 0.5+ 0.4+ 131123 213 0.0 0.1+ 200816 J01 0.0 0.1- 130803 H06 0.6- 0.8+ 131123 C23 1.8- 0.9+ 200816 J01 0.2- 0.2- 130805 Y00 1.2- 0.4- 131123 C23 0.3+ 1.4+ 200816 J01 0.2- 0.3- 130805 Y00 0.7- 0.6- 131123 C23 0.2- 0.1+ 200820 G96 0.4- 0.2- 130805 Y00 0.4+ 0.6- 131125 C91 0.4- 0.7+ 200820 G96 0.3- 0.1- 130811 235 0.7+ 1.2+ 131125 C91 0.3- 0.5+ 200820 G96 0.3- 0.1- 130811 235 0.6+ 0.8+ 131125 C91 0.9+ 0.1+ 200820 G96 0.2- 0.2+ 130817 A71 0.1- 0.5- 131126 703 0.7- 0.0 200822 F51 0.3- 0.0 130817 A71 0.8+ 0.4+ 131126 703 1.0- 0.6+ 200822 F51 0.2- 0.0 130819 H45 (3.3+ 0.3+) 131126 703 0.1- 0.3- 200822 F51 0.3- 0.0 130819 H45 (2.3+ 0.4+) 131126 703 1.3- 0.6+ 200822 F51 0.2- 0.0 ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2020 Sept. 7

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