Nakano Note (Nakano wa Kangaeru noda) NK 5250 P/PANSTARRS (2024 N2 = 2010 T8 = 2017 R2)
The following improved orbital elements, by S. Nakano, are from 35 observations 2009 to 2024. 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. The comet has passed 0.23 AU from Jupiter on 1989 Nov. 4 and will pass 0.85 AU from Jupiter on 2049 Jan. 20 UT. The comet had an orbit of T= 1913 05 14, q= 4.290 AU, e= 0.062, Peri.= 24.1, Node= 282.5, i= 13.1, a= 4.576 AU, P= 9.79 years around early 1900. See an orbit in CBET 5411 (same orbit). Epoch = 2024 June 19.0 TT T = 2024 May 31.05837 +/- 0.00016 (m.e.) TT Peri. = 48.88492 +/- 0.00010 Node = 245.04642 +/- 0.00009 (2000.0) Inc. = 7.78981 +/- 0.00001 q = 2.4403745 +/- 0.0000003 AU e = 0.3571240 +/- 0.0000001 a = 3.7960268 +/- 0.0000007 AU n' = 0.13326318 +/- 0.00000004 P = 7.396 +/- 0.0000022 years T = 2009 July 23.18056 TT Epoch = 2009 July 28.0 TT Peri. = 48.23299 e = 0.3489598 Node = 245.83919 (2000.0) a = 3.8390853 AU Inc. = 7.77159 n'= 0.13102749 q = 2.4993989 AU P = 7.522 years T = 2017 Jan. 1.52308 TT Epoch = 2017 Jan. 7.0 TT Peri. = 48.58539 e = 0.3574490 Node = 245.15055 (2000.0) a = 3.7949767 AU Inc. = 7.79164 n'= 0.13331850 q = 2.4384660 AU P = 7.393 years The predicted orbit for the 2031 return is as follows: T = 2031 Oct. 18.60421 TT Epoch = 2031 Oct. 21.0 TT Peri. = 48.42223 e = 0.3558314 Node = 245.00450 (2000.0) a = 3.8027449 AU Inc. = 7.78362 n'= 0.13291019 q = 2.4496088 AU P = 7.416 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2009/ 170719 W84 0.6+ 0.3+ 240615 F52 0.1- 0.1- 090627 F51 1.6- 0.8- 170723 W84 0.6+ 0.1+ 240615 F52 0.0 0.0 090627 F51 1.4- 0.6- 170902 F51 0.4+ 0.4+ 240615 F52 0.1+ 0.1- 2010/ 170902 F51 0.1- 0.0 240703 F51 0.1+ 0.1+ 101008 F51 0.3- 0.3+ 170902 F51 0.5+ 0.2+ 240703 F51 0.1- 0.1- 101008 F51 0.6- 0.3- 2023/ 240703 F51 0.0 0.1- 101008 F51 0.1+ 0.0 230326 F52 0.0 0.5+ 240703 F51 0.1- 0.1- 101008 F51 0.2- 0.2+ 230327 F51 0.5- 0.1+ 240704 T14 0.0 0.0 2016/ 2024/ 240704 T14 0.0 0.0 160629 F51 0.2+ 0.1- 240409 F52 0.3- 0.1+ 240704 T14 0.1+ 0.0 160629 F51 0.3+ 0.1- 240409 F52 0.1- 0.1+ 240708 L06 0.4- 0.1+ 160629 F51 0.0 0.1+ 240607 F52 0.1- 0.0 240709 L06 0.2- 0.1+ 160629 F51 0.3+ 0.1+ 240607 F52 0.0 0.1- 240709 L06 0.1+ 0.1+ 2017/ 240607 F52 0.1+ 0.0 ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2024 July 10