Nakano Note (Nakano wa Kangaeru noda) NK 3773 P/2018 P4 (PANSTARRS)

The following improved orbital elements, by S. Nakano, are from 102 observations 2018 July 10 to Dec. 4. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.34 arc second. See an orbit in HICQ 2019. Epoch = 2018 Nov. 18.0 TT T = 2018 Nov. 7.37161 +/- 0.01860 (m.e.) TT Peri. = 8.12019 +/- 0.00315 Node = 353.11022 +/- 0.00002 (2000.0) Inc. = 23.11196 +/- 0.00021 q = 3.6661165 +/- 0.0000179 AU e = 0.4493840 +/- 0.0000050 a = 6.6582091 +/- 0.0000688 AU n' = 0.05736776 +/- 0.00000089 P = 17.181 +/- 0.0002663 years (+/- 0.10 day) The predicted orbit for the 2036 return is as follows: T = 2036 Feb. 16.57350 TT Epoch = 2036 Jan. 28.0 TT Peri. = 8.22355 e = 0.4506595 Node = 353.09825 (2000.0) a = 6.7064072 AU Inc. = 23.04245 n'= 0.05675044 q = 3.6841011 AU P = 17.367 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2018/ 180819 K87 0.7- 0.3+ 180929 703 0.7- 0.9- 180710 F51 0.0 0.0 180819 K87 0.6- 0.4+ 180929 703 0.0 1.3+ 180710 F51 0.1- 0.1- 180820 Q62 0.5- 0.4- 180930 G96 0.0 0.1- 180710 F51 0.0 0.0 180820 Q62 0.7- 0.3- 180930 G96 0.1+ 0.1- 180808 F51 0.1+ 0.0 180821 215 0.1- 0.5- 180930 G96 0.1- 0.0 180808 F51 0.0 0.1+ 180821 215 0.4- 0.3- 180930 G96 0.1- 0.2- 180808 F51 0.1+ 0.1+ 180821 215 0.3+ 0.3- 181003 T05 0.6+ 0.2- 180808 F51 0.0 0.0 180822 G40 0.0 0.5+ 181003 T05 0.7+ 0.3+ 180810 L01 0.4- 0.5- 180822 G40 0.4- 0.4- 181003 T05 0.3+ 0.2- 180810 L01 0.4- 0.5- 180904 K77 1.0- 0.3+ 181003 T05 0.6+ 0.5- 180810 L01 0.3- 0.3- 180904 K77 1.1- 0.3+ 181003 T05 1.5+ 1.0- 180810 568 0.2+ 0.1+ 180907 J04 0.3+ 0.3+ 181006 G96 0.0 0.0 180810 568 0.1+ 0.1+ 180907 J04 0.0 0.6+ 181006 G96 0.0 0.0 180810 568 0.2+ 0.1+ 180907 J04 0.2+ 0.4+ 181006 G96 0.1- 0.0 180812 Q62 0.7+ 0.8+ 180907 J04 0.9- 0.1+ 181006 703 0.0 0.5- 180812 Q62 0.6+ 0.5+ 180907 703 0.3+ 0.9- 181006 G96 0.1+ 0.0 180812 Q62 0.5+ 0.4+ 180907 703 0.2- 0.9- 181006 703 0.0 0.1- 180814 691 0.5- 0.3+ 180907 G96 0.0 0.2- 181006 703 0.4+ 0.4- 180814 691 0.4+ 0.1- 180907 G96 0.2+ 0.1- 181006 703 0.4- 0.5- 180814 691 1.3- 1.1- 180907 G96 0.0 0.2- 181009 461 0.2- 0.6+ 180817 K88 0.1- 0.4+ 180907 G96 0.1+ 0.0 181009 461 0.2- 0.6+ 180817 K88 0.3- 0.5+ 180908 D29 0.5- 0.1- 181009 461 0.3- 0.6+ 180817 K88 0.3- 0.5+ 180908 D29 0.7- 0.1- 181010 703 0.3+ 0.2- 180817 104 0.3- 0.7- 180908 D29 0.0 0.1+ 181010 703 0.2+ 0.2- 180817 104 0.3- 0.7- 180910 703 0.0 0.0 181010 703 1.1- 0.7+ 180817 F51 0.1+ 0.0 180910 703 0.0 0.5- 181010 703 0.4- 0.8+ 180817 F51 0.0 0.0 180910 703 0.1+ 0.3- 181015 T05 0.4+ 0.1+ 180817 F51 0.2+ 0.0 180910 703 0.1- 0.3- 181015 T05 0.1+ 0.5- 180817 F51 0.1+ 0.1+ 180911 A71 0.2+ 0.4- 181015 T05 0.3+ 0.2- 180817 K88 0.2- 0.4+ 180911 A71 0.1- 0.2- 181015 T05 0.4+ 0.5+ 180818 K88 0.1- 0.2+ 180913 G96 0.1- 0.1- 181204 H06 0.4- 0.0 180818 K88 0.1- 0.4+ 180913 G96 0.3- 0.1- 181204 H06 0.2- 0.5+ 180818 106 0.0 0.4- 180913 G96 0.1- 0.2- 181204 H06 0.0 0.4+ 180818 106 0.4- 0.7- 180913 G96 0.2- 0.2- 180819 K87 0.7- 0.1- 180929 703 0.2+ 0.1+ ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2019 Jan. 5

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