Nakano Note (Nakano wa Kangaeru noda) NK 4201 277P/LINEAR

The following improved orbital elements, by S. Nakano, are from 189 observations 2005 to 2020, 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 +/- 0.70 arc second. Residuals of re-observations on 2020 August were +40" for Right Ascension and +8" for Declination from the prediction by T. Kobayashi in NK 3438 (= HICQ 2020) with the delta-T correction = -0.025 day. See the previous orbits in NK 1404, NK 2394 and NK 3438. Epoch = 2020 Dec. 17.0 TT T = 2020 Dec. 30.16645 +/- 0.00208 (m.e.) TT Peri. = 152.31520 +/- 0.00078 Node = 276.34491 +/- 0.00003 (2000.0) Inc. = 16.77884 +/- 0.00005 q = 1.9044808 +/- 0.0000021 AU e = 0.5055942 +/- 0.0000007 a = 3.8520596 +/- 0.0000069 AU n' = 0.13036607 +/- 0.00000035 P = 7.560 +/- 0.0000204 years A1 = +1.707 +/- 0.168 A2 = -0.03217 +/- 0.00231 T = 2005 Nov. 3.96578 TT Epoch = 2005 Nov. 6.0 TT Peri. = 152.30707 e = 0.5037072 Node = 276.37792 (2000.0) a = 3.8668160 AU Inc. = 16.72471 n'= 0.12962053 q = 1.9190730 AU P = 7.604 years T = 2013 June 5.90315 TT Epoch = 2013 May 28.0 TT Peri. = 152.28959 e = 0.5045627 Node = 276.36170 (2000.0) a = 3.8616262 AU Inc. = 16.74755 n'= 0.12988193 q = 1.9131937 AU P = 7.588 years The predicted orbit for the 2028 return is as follows: T = 2028 July 26.48171 TT Epoch = 2028 July 8.0 TT Peri. = 152.46139 e = 0.5057281 Node = 276.24073 (2000.0) a = 3.8520951 AU Inc. = 16.78611 n'= 0.13036427 q = 1.9039825 AU P = 7.560 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2005/ 060109 A48 0.8+ 0.6+ 060122 A30 0.0 0.0 050915 704 0.4- 1.2+ 060109 A48 0.4+ 0.4+ 060122 A30 0.4- 0.4+ 050915 704 0.9- 0.1+ 060109 A48 0.3+ 0.2+ 060122 A30 0.4- 0.3+ 050915 704 (0.1+ 2.3+) 060109 A57 0.5+ 0.6+ 060123 704 0.9+ 0.9+ 051103 704 0.1- 0.7+ 060109 A57 0.6- 0.6- 060123 704 1.2+ 0.9- 051103 704 (1.0+ 2.6+) 060109 560 0.4- 0.4+ 060123 704 0.3+ 0.3- 051103 704 2.0+ 1.6+ 060109 A57 0.6- 0.5+ 060123 704 1.6+ 1.5- 051205 704 0.6+ 0.3- 060109 A57 0.8+ 0.2+ 060123 349 0.5- 0.4+ 051205 704 0.5+ 0.7- 060109 560 0.3- 0.8+ 060123 349 0.5- 0.8+ 051205 704 0.5+ 0.5- 060109 560 0.4- 0.8+ 060123 349 1.1- 0.7+ 051205 704 0.4+ 0.9- 060109 147 0.1- 0.5+ 060126 H45 0.3- 0.2- 051205 704 0.6+ 0.3- 060109 A57 0.5- 2.0+ 060126 H45 1.4+ 0.2- 051210 691 0.1+ 0.4- 060109 147 0.2- 0.2- 060126 H45 0.4- 0.1+ 051210 691 0.9+ 1.9- 060109 A57 1.3- 0.6- 060128 D88 0.9- 1.3+ 051210 691 0.2+ 0.7- 060109 A57 0.5- 0.1+ 060128 D88 0.0 0.2+ 051228 704 1.7- 1.1+ 060109 A57 0.3+ 0.2- 060128 D88 0.7- 1.0+ 051228 704 0.2- 0.0 060109 203 0.4- 0.2+ 060128 349 2.0+ 0.4+ 051228 704 0.4- 0.8- 060110 203 0.1- 0.0 060128 349 1.9+ 0.3+ 051228 704 0.4- 0.4- 060110 204 0.2+ 0.3+ 060128 349 1.8+ 0.4+ 051228 704 1.0- 1.1+ 060110 204 0.2+ 0.0 060204 704 0.4+ 0.0 051229 704 0.2+ 0.0 060110 204 0.2- 0.0 060204 704 0.2- 0.1+ 051229 704 0.3+ 1.1- 060110 H06 0.3- 0.1- 060204 704 0.3+ 0.5- 051229 704 0.0 1.2- 060110 H06 0.1- 0.1- 060204 704 0.6+ 0.0 051229 704 0.2+ 0.7- 060110 H06 0.2+ 0.7- 060204 704 0.0 0.2- 051229 704 0.6- 2.0- 060110 A48 0.8- 0.4+ 060205 349 1.3+ 1.0- 051230 704 0.2+ 1.4- 060110 A48 1.2- 0.5+ 060205 349 1.3+ 1.3- 051230 704 0.4+ 1.1- 060110 A48 1.1- 0.4+ 060205 349 1.1+ 1.2- 051230 704 1.0+ 1.4- 060110 A48 0.7- 0.4+ 060213 213 0.3- 0.2+ 051230 704 0.7+ 1.8- 060111 673 0.5- 0.3+ 060213 213 0.4- 0.0 051230 704 0.3+ 2.0- 060111 673 1.1- 0.8+ 060213 213 0.0 0.1+ 051231 691 0.5- 0.4+ 060111 673 0.6- 0.2+ 060216 213 0.3- 0.0 051231 691 0.3- 0.3+ 060111 673 0.2- 0.4+ 060216 213 0.3- 0.1+ 051231 691 0.8+ 0.2- 060111 160 0.9- 0.7+ 060216 213 1.7- 0.7- 051231 704 0.5+ 0.5+ 060111 160 0.6- 0.0 060219 118 0.7- 0.6- 051231 704 0.1- 0.7- 060111 160 0.2- 0.1+ 060219 118 0.6- 0.7- 051231 704 0.3+ 0.5- 060111 160 0.9- 0.3+ 060227 850 0.9+ 1.6- 051231 704 0.2- 0.3+ 060111 160 0.2+ 0.2- 060227 850 1.9- 0.9- 051231 704 (1.3- 3.5+) 060111 160 0.6- 0.8+ 060227 850 0.9+ 0.9+ 051231 704 (2.9- 0.3+) 060114 204 0.8- 0.0 060227 850 1.7+ 0.7+ 051231 704 0.1+ 0.9- 060115 204 0.4+ 0.4+ 060227 850 1.3+ 0.7- 051231 704 0.0 1.1- 060116 A80 0.1+ 0.9+ 060227 850 0.1+ 0.1+ 051231 704 0.3- 0.9- 060116 A80 0.4- 0.7+ 060319 215 0.9+ 1.0- 2006/ 060116 A80 0.0 0.5+ 060319 215 0.5+ 0.4- 060102 704 0.1- 0.2+ 060118 349 0.0 1.3+ 2013/ 060102 704 0.5+ 0.2- 060118 349 0.0 1.0+ 130107 291 0.3+ 1.0+ 060102 704 0.9+ 0.3- 060118 349 0.5- 0.8+ 130107 291 0.3- 1.1+ 060102 704 0.1+ 0.3- 060119 104 0.2- 0.6+ 130107 291 0.3- 0.7+ 060102 704 (2.9+ 0.0 ) 060119 473 1.4- 0.2+ 130118 291 0.4- 0.1+ 060104 H45 0.1+ 0.4- 060119 104 0.1- 0.5+ 130118 291 0.9- 0.0 060104 H45 0.9- 0.1+ 060119 104 0.1- 0.6+ 130118 291 0.4- 1.6+ 060104 H45 0.4+ 0.3+ 060119 215 0.9- 1.1- 131007 H06 0.5+ 0.6+ 060104 H45 0.0 0.6+ 060119 215 0.8- 0.9- 131007 H06 0.6+ 0.7+ 060104 H45 0.1+ 0.1- 060119 215 1.0- 0.8- 131007 H06 0.2- 0.9+ 060105 704 0.7+ 0.2+ 060122 D88 0.5- 0.3+ 131031 G96 0.6+ 0.0 060105 704 (5.2+ 0.0 ) 060122 D88 0.3+ 0.3- 131031 G96 0.2+ 0.3+ 060105 704 0.6+ 1.5- 060122 D88 0.5+ 0.2- 131031 G96 0.3+ 1.0- 060105 704 0.3+ 0.5- 060122 349 0.2+ 0.0 131031 G96 0.0 0.1- 060105 704 0.2+ 0.2- 060122 349 0.8+ 0.5- 131214 215 0.9+ 0.8+ 060106 160 0.8- 1.0+ 060122 349 0.8+ 0.1+ 131214 215 0.2+ 1.1+ 060106 A57 0.3- 0.4+ 060122 473 0.3+ 0.8+ 131214 215 0.6- 1.3+ 060106 A57 0.2- 0.5+ 060122 473 0.3- 0.8+ 2020/ 060106 A57 0.8- 1.0+ 060122 473 0.2+ 1.7+ 200820 A77 0.1+ 0.0 060106 A57 0.6- 0.5+ 060122 130 0.1- 0.5+ 200820 A77 0.1+ 0.1+ 060109 A30 0.3+ 0.4- 060122 130 0.3- 0.1+ 200821 A77 (2.9- 8.4+) 060109 A30 0.5+ 0.2- 060122 130 0.0 0.1+ 200821 A77 0.1+ 0.0 060109 A30 0.5+ 0.2+ 060122 130 0.2- 0.2+ 200821 A77 0.2- 0.5- 060109 A48 0.1- 0.3- 060122 A30 0.2+ 0.0 ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2020 Sept. 7

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