Nakano Note (Nakano wa Kangaeru noda) NK 4903 P/PANSTARRS (2019 S9 = 2011 Q5 = 2022 R7)

The following improved orbital elements, by S. Nakano, are from 70 observations 2011 to 2022. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.35 arc second. Residuals for the recovery observations on 2022 Aug. 6 were +0.29 deg for Right Ascension and +0.03 deg for Declination from the prediction in NK 4285 with the delta-T correction = -0.69 day. See an orbit in CBET 5200 (same orbit). Epoch = 2023 Feb. 25.0 TT T = 2023 Feb. 25.46800 +/- 0.00094 (m.e.) TT Peri. = 237.56524 +/- 0.00027 Node = 146.20510 +/- 0.00003 (2000.0) Inc. = 14.13775 +/- 0.00001 q = 2.1916918 +/- 0.0000003 AU e = 0.3053851 +/- 0.0000001 a = 3.1552618 +/- 0.0000006 AU n' = 0.17585348 +/- 0.00000005 P = 5.605 +/- 0.0000017 years T = 2011 Dec. 19.54334 TT Epoch = 2011 Dec. 25.0 TT Peri. = 238.27081 e = 0.3049760 Node = 146.26882 (2000.0) a = 3.1558869 AU Inc. = 14.13518 n'= 0.17580123 q = 2.1934173 AU P = 5.606 years T = 2017 July 23.63636 TT Epoch = 2017 July 26.0 TT Peri. = 237.93077 e = 0.3042585 Node = 146.20988 (2000.0) a = 3.1551991 AU Inc. = 14.13755 n'= 0.17585872 q = 2.1952030 AU P = 5.605 years The predicted orbit for the 2028 return is as follows: T = 2028 Oct. 1.39273 TT Epoch = 2028 Sept.26.0 TT Peri. = 237.41041 e = 0.3038013 Node = 146.16561 (2000.0) a = 3.1564017 AU Inc. = 14.13224 n'= 0.17575823 q = 2.1974829 AU P = 5.608 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2011/ 170930 F51 0.1- 0.0 171021 291 (2.3- 0.1+) 110821 F51 0.2- 0.3- 171001 U69 0.1+ 0.3+ 171021 291 0.1- 0.6+ 110821 F51 0.1+ 0.2+ 171001 U69 0.1- 0.1+ 171022 568 0.2+ 0.1- 110823 F51 0.1- 0.2- 171013 291 0.2- 0.1- 171022 568 0.1+ 0.1- 110823 F51 0.1+ 0.1+ 171013 291 0.4- 0.3- 171022 568 0.2+ 0.1- 110827 F51 0.3+ 0.4+ 171013 291 0.5- 0.4- 171030 F51 0.1+ 0.1- 110827 F51 0.1+ 0.1- 171014 691 0.5- 0.1- 171030 F51 0.1+ 0.0 110827 F51 0.1- 0.2- 171014 691 0.4- 0.7+ 171030 F51 0.1+ 0.0 110827 F51 0.3- 0.1+ 171015 K88 0.2- 0.2+ 171108 F51 0.2- 0.2+ 110828 F51 0.2- 0.5+ 171015 K88 0.3- 0.3+ 171108 F51 0.0 0.0 110828 F51 0.1- 0.0 171015 691 0.9- 1.0+ 171108 F51 0.1- 0.1+ 110907 F51 0.1+ 0.1- 171015 691 1.2- 0.1- 171108 F51 0.0 0.3- 110907 F51 0.1+ 0.1+ 171015 691 1.5- 0.8+ 171214 F51 0.1- 0.0 2017/ 171016 K88 0.1- 0.4+ 171214 F51 0.5+ 0.1+ 170919 F51 0.2+ 0.0 171016 K88 0.5- 0.4+ 171214 F51 0.0 0.4+ 170919 F51 0.1- 0.0 171017 K88 0.4- 0.2+ 2022/ 170919 F51 0.0 0.2- 171017 K88 0.2- 0.1- 220806 F52 0.1+ 0.1- 170919 F51 0.2+ 0.2+ 171017 691 1.7- 0.0 220806 F52 0.1+ 0.0 170930 F51 0.1- 0.2- 171017 691 0.7- 0.3- 220806 F52 0.1- 0.3+ 170930 F51 0.1- 0.0 171017 691 0.4- 0.3+ 220806 F52 0.1- 0.0 170930 F51 0.1- 0.1+ 171018 K88 0.3- 0.2+ 220902 F51 0.1- 0.2- 170930 F51 0.1+ 0.1- 171018 K88 0.1- 0.2+ 220902 F51 0.0 0.0 170930 F51 0.1+ 0.1- 171020 F51 0.1- 0.5- 220902 F51 0.2+ 0.1- 170930 F51 0.2+ 0.1- 171020 F51 0.2- 0.2+ 220902 F51 0.0 0.2- 170930 F51 0.2+ 0.1+ 171021 291 0.8- 0.6+ ( ) -------- Rejected Obs.

Associate of the CBAT Late edition Syuichi Nakano 2022 Dec. 14

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