Nakano Note (Nakano wa Kangaeru noda) NK 4409 P/2015 T3 (PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 54 observations 2015 Sept. 17 to Nov. 7. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.57 arc second. See the previous orbit in NK 3985 (= HICQ 2021). Epoch = 2015 Feb. 27.0 TT T = 2015 Mar. 10.13774 +/- 0.03376 (m.e.) TT Peri. = 196.60811 +/- 0.00768 Node = 119.89584 +/- 0.00347 (2000.0) Inc. = 12.22045 +/- 0.00040 q = 2.1695992 +/- 0.0001754 AU e = 0.4649104 +/- 0.0001317 a = 4.0546467 +/- 0.0010507 AU n' = 0.12071870 +/- 0.00004693 P = 8.164 +/- 0.0031737 years (+/- 1.16 days) The predicted orbit for the 2023 return is as follows: [Caution] A prediction in HICQ 2021 gives T = 2023 Apr. 16 which was computed from short arc of three days, only. T = 2023 May 3.05291 TT Epoch = 2023 May 16.0 TT Peri. = 196.69619 e = 0.4666322 Node = 119.86871 (2000.0) a = 4.0400538 AU Inc. = 12.23687 n'= 0.12137335 q = 2.1548345 AU P = 8.120 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2015/ 151014 568 0.0 0.2- 151015 W96 0.7+ 0.9+ 150917 568 0.1+ 0.1+ 151014 568 0.1- 0.2- 151015 291 0.3- 0.5+ 150917 568 0.0 0.1- 151014 568 0.1- 0.2- 151015 291 0.7- 0.3- 150922 W84 0.2- 0.5+ 151014 Q62 1.4+ 1.6+ 151015 291 0.4- 0.2+ 150922 W84 0.1- 0.2- 151014 Q62 1.5+ 1.3+ 151015 F51 0.1+ 0.1- 150922 W84 0.5+ 0.1+ 151014 Q62 1.4+ 1.1+ 151015 F51 0.1- 0.2- 150922 W84 0.1+ 0.0 151014 474 0.3+ 0.3- 151015 F51 0.2+ 0.2- 151004 W84 0.0 0.1- 151014 474 0.3+ 0.1- 151015 474 0.9+ 0.5+ 151004 W84 0.1+ 0.1- 151014 474 0.6+ 0.0 151015 474 0.3+ 0.2+ 151004 W84 0.2- 0.3- 151014 474 0.5+ 0.1+ 151015 F51 0.1+ 0.2- 151004 W84 0.2- 0.3- 151014 Q62 0.5+ 1.4+ 151015 474 0.4+ 0.3+ 151004 W84 0.2+ 0.1- 151014 Q62 0.2+ 1.1+ 151015 474 1.5+ 0.3+ 151004 W84 0.5- 0.4+ 151014 Q62 0.3+ 0.9+ 151016 W96 0.1- 0.0 151013 F51 0.1- 0.1+ 151014 958 0.5- 0.5+ 151016 W96 1.8+ 0.0 151013 F51 0.1- 0.0 151014 958 0.7+ 0.9+ 151017 W84 0.4- 0.1- 151013 F51 0.4- 0.1+ 151014 958 0.0 0.1- 151017 W84 0.3- 0.3- 151013 F51 0.3- 0.1- 151015 W96 1.0- 1.0+ 151107 W84 0.3- 0.2+ 151014 291 0.0 0.2+ 151015 W96 0.8+ 0.6+ 151107 W84 0.3- 0.1+ 151014 291 1.6- 0.2+ 151015 W96 (1.3- 3.1-) ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2021 Mar. 19