Nakano Note (Nakano wa Kangaeru noda) NK 4820 441P/PANSTARRS
The following improved orbital elements, by S. Nakano, are from 98 observations 2009 to 2022. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.36 arc second. The comet has passed 0.048 AU from Jupiter on 1979 June 22 UT. Before this close approach, comet had an orbit of T= 1978 Oct. 22.0 TT, q= 5.354 AU, e= 0.263, ƒÖ= 91ß.5, ƒ¶= 22ß.4, ‚‰=2ß.1, a= 7.264 AU, P= 19.6 years See the previous orbits in NK 3541, NK 4192 and NK 4645. Epoch = 2025 Sept. 2.0 TT T = 2025 Sept. 9.33062 +/- 0.00086 (m.e.) TT Peri. = 178.85879 +/- 0.00056 Node = 143.59105 +/- 0.00055 (2000.0) Inc. = 2.57484 +/- 0.00005 q = 3.3278744 +/- 0.0000041 AU e = 0.1945565 +/- 0.0000009 a = 4.1317290 +/- 0.0000069 AU n' = 0.11735628 +/- 0.00000030 P = 8.398 +/- 0.0000211 years T = 2008 Nov. 27.48551 TT Epoch = 2008 Nov. 30.0 TT Peri. = 179.15651 e = 0.1966665 Node = 143.64262 (2000.0) a = 4.1358516 AU Inc. = 2.57246 n'= 0.11718085 q = 3.3224680 AU P = 8.411 years T = 2017 Apr. 8.17927 TT Epoch = 2017 Mar. 28.0 TT Peri. = 178.37443 e = 0.1945464 Node = 143.65303 (2000.0) a = 4.1309982 AU Inc. = 2.57339 n'= 0.11738742 q = 3.3273273 AU P = 8.396 years The predicted orbit for the 2034 return is as follows: T = 2034 Jan. 17.35159 TT Epoch = 2033 Dec. 29.0 TT Peri. = 178.01178 e = 0.1969794 Node = 143.59011 (2000.0) a = 4.1329582 AU Inc. = 2.57664 n'= 0.11730393 q = 3.3188508 AU P = 8.402 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2009/ 170915 I52 0.6- 0.0 170928 F51 0.2+ 0.2+ 090925 691 0.1- 0.4- 170915 W85 0.2+ 0.3- 171014 215 0.1- 0.8+ 090925 691 0.2+ 0.1- 170915 W85 0.2+ 0.4- 171014 215 0.2+ 0.1+ 090925 691 0.2+ 0.3- 170915 W85 0.3+ 0.4- 171014 215 0.4+ 0.4- 2017/ 170915 W85 0.1+ 0.3- 2018/ 170718 W84 0.0 0.3- 170915 W85 0.6+ 0.3- 180106 F51 0.2+ 0.0 170721 W84 0.1+ 0.1- 170915 568 0.4+ 0.0 180106 F51 0.5+ 0.3+ 170724 W84 0.2+ 0.0 170915 568 0.4+ 0.1+ 2020/ 170730 W84 0.1+ 0.2- 170915 568 0.3+ 0.0 200130 W84 0.8- 0.1+ 170730 F51 0.4- 0.0 170915 Q62 0.5- 0.1+ 200130 W84 0.8- 0.5+ 170730 F51 0.4- 0.0 170915 Q62 0.3- 0.2+ 2022/ 170730 F51 0.5- 0.0 170915 Q62 0.0 0.3+ 220125 G96 0.7+ 0.0 170730 F51 0.3- 0.0 170917 W84 0.3+ 0.0 220125 G96 0.0 0.2+ 170801 F51 0.2+ 0.3- 170917 W84 0.4+ 0.1+ 220125 G96 0.1+ 0.1+ 170801 F51 0.1+ 0.1+ 170917 F51 0.1+ 0.0 220125 G96 0.5- 0.8+ 170801 F51 0.2- 0.0 170917 F51 0.3+ 0.0 220210 F52 0.2+ 0.3- 170801 F51 0.1+ 0.1- 170917 F51 0.1+ 0.2- 220210 F52 0.2+ 0.1- 170803 F51 0.4- 0.1- 170917 F51 0.1+ 0.1- 220210 F52 0.1+ 0.1- 170803 F51 0.5- 0.2- 170918 691 0.9- 0.4- 220210 F52 0.1+ 0.3- 170803 F51 0.3- 0.1- 170918 691 1.1- 0.0 220224 F52 0.1- 0.2- 170803 F51 0.4- 0.1+ 170918 691 1.1- 0.3+ 220224 F52 0.2+ 0.2- 170817 F51 0.1+ 0.1- 170918 I52 0.3+ 0.3+ 220224 F52 0.0 0.2- 170817 F51 0.0 0.2+ 170918 I52 0.4- 0.3+ 220224 F52 0.1+ 0.2- 170817 F51 0.0 0.1- 170918 I52 0.4- 0.4- 220224 F52 0.1+ 0.1- 170817 F51 0.0 0.1- 170918 I52 1.1- 0.5+ 220224 F52 0.2+ 0.1- 170902 G96 0.3- 0.2+ 170919 691 1.5- 0.4- 220302 G96 0.2- 0.1- 170902 G96 0.5- 0.1- 170919 691 0.1+ 0.4+ 220302 G96 0.5- 0.1- 170902 G96 0.6- 0.6- 170919 691 0.1- 0.3- 220302 G96 0.1- 0.4- 170902 G96 0.7- 0.2- 170919 I52 0.3+ 0.3- 220302 G96 0.4- 0.1- 170914 F51 0.1+ 0.2+ 170919 I52 0.2+ 0.0 220309 215 0.5- 0.7- 170914 F51 0.1- 0.1+ 170919 I52 0.2- 0.3- 220309 215 0.0 0.9+ 170914 F51 0.2+ 0.0 170919 I52 0.2- 0.2- 220311 Q62 0.2+ 0.5- 170914 F51 0.2+ 0.0 170920 W84 0.3+ 0.0 220311 Q62 0.3+ 0.0 170915 I52 0.3- 0.9+ 170928 F51 0.4+ 0.1+ 170915 I52 0.4+ 0.7+ 170928 F51 0.2+ 0.2+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2022 Oct. 30