Nakano Note (Nakano wa Kangaeru noda) NK 3582 P/2016 A3 (PANSTARRS)

The following improved orbital elements, by S. Nakano, are from 126 observations 2016 Jan. 4 to 2018 May 9. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.51 arc second. The comet will pass 0.80 AU from Jupiter on 2038 Mar. 27 UT. See the previous orbits in NK 3330, NK 3350 and NK 3505 (= HICQ 2018). Epoch = 2017 Mar. 28.0 TT T = 2017 Apr. 13.59609 +/- 0.00095 (m.e.) TT Peri. = 338.47202 +/- 0.00012 Node = 187.79440 +/- 0.00007 (2000.0) Inc. = 8.59398 +/- 0.00001 q = 4.7894935 +/- 0.0000043 AU e = 0.3797962 +/- 0.0000049 a = 7.7224507 +/- 0.0000631 AU n' = 0.04592735 +/- 0.00000055 P = 21.460 +/- 0.0002645 years (+/- 0.10 day) The predicted orbit for the 2039 return is as follows: T = 2039 June 19.94834 TT Epoch = 2039 June 21.0 TT Peri. = 351.11933 e = 0.3687113 Node = 179.43760 (2000.0) a = 7.5537823 AU Inc. = 9.11226 n'= 0.04747417 q = 4.7686174 AU P = 20.761 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2016/ 161213 F51 0.1+ 0.1+ 170326 A71 0.2- 0.7+ 160104 F51 0.0 0.1+ 161213 F51 0.1+ 0.1- 170326 A71 0.9+ 0.1- 160104 F51 0.0 0.0 161213 F51 0.0 0.2- 170326 215 (2.0- 0.2-) 160104 F51 0.0 0.1+ 2017/ 170326 215 1.7- 0.8+ 160104 F51 0.1- 0.0 170126 F51 0.2+ 0.2- 170326 215 1.6- 1.6+ 160105 568 0.1+ 0.1- 170126 F51 0.1+ 0.1- 170329 J43 0.1- 0.4+ 160105 568 0.1+ 0.1- 170126 F51 0.3+ 0.2- 170329 J43 0.2- 0.3+ 160105 568 0.1+ 0.1- 170126 F51 0.1+ 0.1- 170329 J43 0.3- 0.2+ 160106 H21 0.2- 0.1- 170221 J22 0.3+ 0.4+ 170329 J43 0.1+ 0.0 160106 H21 0.2- 0.2- 170221 J22 0.3+ 0.9+ 170330 F51 0.5+ 0.1- 160106 H21 0.2- 0.2- 170221 J22 1.3- 0.2+ 170330 F51 0.0 0.1+ 160106 O75 0.7- 0.9+ 170222 G45 0.7- 0.2+ 170330 F51 0.5+ 0.4- 160106 O75 0.5- 1.1+ 170222 G45 0.8- 0.4+ 170330 F51 0.3- 0.4+ 160106 O75 1.0- 0.1- 170222 G45 0.4- 0.4+ 170331 A71 0.3- 0.5+ 160107 F51 0.0 0.2- 170222 G45 0.2- 0.1+ 170331 A71 0.2- 0.6+ 160107 F51 0.0 0.2- 170222 H15 (2.0- 0.6+) 170401 J43 0.4+ 0.1- 160107 F51 0.0 0.1+ 170222 H15 0.9- 0.1+ 170401 J43 0.0 0.0 160107 F51 0.1- 0.1- 170222 H15 (2.1- 1.0+) 170401 J43 0.4+ 0.0 160107 Q62 0.2- 0.1- 170224 703 1.4- 0.9+ 170401 J43 0.0 0.2+ 160107 Q62 0.2- 0.1+ 170224 703 0.9- 0.3+ 170401 J43 0.0 0.0 160107 Q62 0.2+ 0.2- 170224 703 1.3- 0.5+ 170401 J43 0.1- 0.1- 160110 E07 0.1- 0.1- 170224 703 0.4- 0.6+ 170401 J43 0.0 0.1+ 160110 E07 0.4- 0.1- 170224 G45 0.6- 0.3+ 170401 J43 0.3+ 0.1- 160112 F51 0.0 0.2- 170224 G45 0.6- 0.3+ 170519 T05 0.4+ 0.1+ 160112 F51 0.1+ 0.0 170224 G45 0.3- 0.3+ 170519 T05 0.4+ 0.0 160112 F51 0.1+ 0.1- 170224 G45 0.1- 0.3+ 170519 T05 0.8- 0.6- 160113 G45 0.5- 0.2+ 170224 G45 0.5- 0.1+ 170519 T05 (0.9+ 2.1-) 160113 G45 0.5- 0.2+ 170224 T05 0.7- 1.3+ 170528 703 0.3- 0.3+ 160113 G45 0.0 0.7+ 170224 T05 1.1- 0.4+ 170528 703 0.7- 0.5+ 160113 G45 0.2+ 0.1+ 170224 T05 (2.6- 0.5+) 170528 703 0.0 0.3+ 160129 703 (2.4+ 0.1+) 170224 T05 (2.2- 0.6-) 2018/ 160129 703 1.2+ 0.4- 170301 J22 0.4+ 0.2+ 180407 215 (2.3- 1.0-) 160129 703 (4.0- 0.6+) 170301 J22 0.1+ 1.1+ 180407 215 (2.0- 0.3-) 160204 J22 0.7- 0.2+ 170301 J22 0.4+ 1.2+ 180407 215 0.7- 0.2+ 160204 J22 1.3- 0.5+ 170320 J22 0.0 0.3+ 180412 F52 0.0 0.4- 160204 J22 1.4- 0.0 170320 J22 0.7+ 0.3+ 180412 F52 0.2+ 0.1- 160212 F51 0.0 0.1- 170320 J22 0.2- 0.2- 180412 F52 0.0 0.3- 160212 F51 0.0 0.1- 170320 691 (3.0- 1.1+) 180418 703 0.1+ 0.8- 160212 F51 0.0 0.1- 170320 691 (2.6- 0.9+) 180418 703 (2.2- 0.6+) 160212 F51 0.0 0.1- 170320 691 1.6- 0.8+ 180418 703 (3.3- 0.2+) 160228 W55 0.4+ 0.1- 170322 F51 0.4+ 0.3+ 180418 703 (5.3- 0.5+) 160228 W55 0.0 0.6- 170322 F51 0.1+ 0.0 180423 G96 0.2+ 0.4- 160310 215 0.1+ 0.3+ 170322 F51 0.1+ 0.1- 180423 G96 0.5- 0.1- 160310 215 0.1+ 0.2+ 170322 F51 0.1+ 0.0 180423 G96 1.1- 0.3+ 160310 215 0.3+ 0.4+ 170325 D29 0.2+ 0.6- 180423 G96 0.9- 0.2- 161204 G96 1.5- 0.3+ 170325 D29 0.5+ 0.5+ 180509 Q62 0.7- 0.3- 161204 G96 1.7- 0.9+ 170325 D29 0.4- 0.1+ 180509 Q62 0.5- 0.2- 161204 G96 1.5- 0.6+ 170326 A71 0.2- 0.1- 180509 Q62 0.3- 0.1- ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2018 May 17

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