Nakano Note (Nakano wa Kangaeru noda) NK 4110 P/2017 B4 (PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 87 observations 2016 Dec. 22 to 2017 Mar. 28. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.45 arc second. The comet will pass 0.64 AU from Jupiter on 2020 Aug. 7 UT. Epoch = 2017 Feb. 16.0 TT T = 2017 Jan. 27.09278 +/- 0.00981 (m.e.) TT Peri. = 16.18506 +/- 0.00247 Node = 121.54691 +/- 0.00022 (2000.0) Inc. = 20.18253 +/- 0.00029 q = 2.8169933 +/- 0.0000231 AU e = 0.3577326 +/- 0.0000035 a = 4.3860133 +/- 0.0000430 AU n' = 0.10729986 +/- 0.00000158 P = 9.186 +/- 0.0001351 years (+/- 0.05 day) The predicted orbit for the 2025 return is as follows: T = 2025 Dec. 2.33542 TT Epoch = 2025 Nov. 21.0 TT Peri. = 11.45785 e = 0.3551513 Node = 119.47177 (2000.0) a = 4.3680573 AU Inc. = 21.05747 n'= 0.10796216 q = 2.8167360 AU P = 9.129 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2016/ 170129 568 0.2+ 0.1- 170201 291 1.3- 0.1- 161222 F51 0.1- 0.1+ 170129 568 0.2+ 0.1- 170201 291 0.7- 0.1+ 161222 F51 0.1+ 0.1- 170130 H06 0.4- 0.4+ 170202 291 1.4- 0.5+ 161228 W84 0.3- 0.2+ 170130 H06 0.4+ 0.3+ 170202 291 1.0- 0.3- 2017/ 170130 H06 0.2- 0.1- 170202 291 0.7- 0.2- 170121 F51 0.3+ 0.3- 170130 I52 0.9- 0.5- 170203 G40 1.7- 0.3+ 170121 F51 0.1+ 0.0 170130 I52 (2.1- 0.0 ) 170203 G40 0.6- 0.3- 170121 F51 0.2+ 0.2+ 170130 I52 0.7- 0.4- 170203 291 0.7- 0.1+ 170121 F51 0.0 0.1+ 170130 I52 0.8- 0.1- 170203 291 1.0- 0.1- 170121 F51 0.1- 0.0 170131 658 0.3+ 0.6+ 170203 291 1.4- 0.3+ 170121 F51 0.2- 0.1+ 170131 658 0.3- 0.9+ 170204 F51 0.2+ 0.1+ 170121 F51 0.2- 0.2+ 170131 658 0.0 1.1+ 170204 F51 0.4+ 0.1+ 170123 F51 0.1+ 0.0 170131 G96 0.7- 0.2+ 170204 F51 0.3+ 0.1+ 170123 F51 0.0 0.2- 170131 G96 0.1- 0.1- 170205 215 0.2- 0.2+ 170123 F51 0.1+ 0.0 170131 G96 0.2+ 0.1+ 170205 215 0.4- 0.2- 170123 F51 0.1- 0.1+ 170131 G96 0.2+ 0.4+ 170205 215 0.2+ 0.2- 170123 F51 0.2- 0.0 170201 658 0.1+ 0.0 170205 F51 0.1+ 0.1- 170124 F51 0.1- 0.1+ 170201 658 0.5- 0.1+ 170205 F51 0.0 0.0 170124 F51 0.3+ 0.1+ 170201 658 0.1- 0.2+ 170205 F51 0.1+ 0.1- 170124 F51 0.0 0.1- 170201 G96 0.2- 0.2+ 170205 F51 0.1+ 0.1- 170124 F51 0.2+ 0.0 170201 G96 1.1- 0.4+ 170205 F51 0.0 0.3- 170124 F51 0.2+ 0.0 170201 G96 1.3- 0.2- 170214 F51 0.2+ 0.1- 170124 F51 0.2- 0.0 170201 G96 1.4- 0.5- 170305 W84 0.0 0.0 170125 F51 0.2+ 0.1- 170201 691 1.4- 0.5+ 170313 F51 0.1- 0.0 170125 F51 0.3- 0.1- 170201 691 1.3- 0.4+ 170313 F51 0.4- 0.2- 170125 F51 0.2+ 0.1+ 170201 691 0.8- 0.5+ 170317 W84 0.1- 0.1+ 170128 F51 0.0 0.1+ 170201 691 0.1- 0.4+ 170328 F51 0.0 0.1+ 170128 F51 0.1+ 0.2- 170201 691 0.7- 0.6+ 170328 F51 0.2+ 0.1+ 170128 F51 0.2+ 0.1+ 170201 691 0.0 0.2+ 170328 F51 0.2+ 0.1- 170129 568 0.2+ 0.1- 170201 291 1.2- 0.2+ 170328 F51 0.1- 0.1+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2020 June 1