Nakano Note (Nakano wa Kangaeru noda) NK 5319 P/Christensen (2016 A2 = 2024 RU145)
The following improved orbital elements, by S. Nakano, are from 65 observations 2014 to 2024. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.55 arc second. Kobayashi has identified the following object with this comet. P10hax1* 2014 12 27.23394 00 52 55.830+36 55 32.60 20.6 i F51 P10hax1 2014 12 27.24622 00 52 56.235+36 55 28.33 20.6 i F51 P10hax1 2014 12 27.25852 00 52 56.657+36 55 23.61 20.7 i F51 Residuals were +1.30 deg for Right Ascension and +0.58 deg for Declination from the prediction (arc 15 days only) in NK 5033 (= CH 2024) with the delta-T correction = -2.67 days. See the previous orbits in HICQ 2016/2017, NK 5033 and CBET 5463 (same orbit). Epoch = 2025 Oct. 12.0 TT T = 2025 Oct. 22.38369 +/- 0.01095 (m.e.) TT Peri. = 141.34425 +/- 0.00151 Node = 291.61391 +/- 0.00004 (2000.0) Inc. = 26.35620 +/- 0.00004 q = 3.4597688 +/- 0.0000013 AU e = 0.2731075 +/- 0.0000002 a = 4.7596708 +/- 0.0000022 AU n' = 0.09491584 +/- 0.00000006 P = 10.384 +/- 0.0000071 years T = 2015 June 26.00242 TT Epoch = 2015 June 27.0 TT Peri. = 141.06082 e = 0.2748442 Node = 291.81136 (2000.0) a = 4.7332882 AU Inc. = 26.37371 n'= 0.09571052 q = 3.4323713 AU P = 10.298 years The predicted orbit for the 2036 return is as follows: T = 2036 Jan. 25.00736 TT Epoch = 2036 Jan. 28.0 TT Peri. = 135.76617 e = 0.2676024 Node = 289.89300 (2000.0) a = 4.8713220 AU Inc. = 26.35324 n'= 0.09167139 q = 3.5677445 AU P = 10.752 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2014/ 160103 G96 0.7+ 0.1- 160115 G96 0.2- 0.6+ 141227 F51 0.1- 0.5- 160104 711 0.2+ 0.4+ 160115 G96 0.6+ 0.1+ 141227 F51 0.1- 0.1+ 160104 711 0.2+ 0.2+ 160115 G96 0.1+ 0.1+ 141227 F51 0.2+ 0.3+ 160104 711 0.9- 0.1+ 160115 H06 (1.5+ 2.3+) 2016/ 160106 O75 0.3- 1.1- 160115 H06 1.6- 0.8+ 160102 G96 0.2+ 0.2+ 160106 O75 1.1- 1.4- 160117 C10 0.8+ 0.1+ 160102 G96 0.9- 0.7+ 160106 O75 1.1- 1.7- 160117 C10 (3.9+ 1.1-) 160102 G96 0.1- 0.3+ 160107 595 0.2- 0.6+ 2024/ 160102 G96 0.5- 0.4+ 160107 595 0.2- 1.1+ 240908 G96 0.3+ 0.2- 160102 F51 0.2- 0.0 160107 595 0.2- 1.2+ 240908 G96 0.4- 0.1+ 160102 G96 0.1- 0.1+ 160107 F51 0.3+ 0.1- 240908 G96 0.2- 0.2+ 160102 G96 0.6- 0.2+ 160107 F51 0.2+ 0.1- 240908 G96 0.0 0.1+ 160102 F51 0.2- 0.0 160107 F51 0.1+ 0.1- 240928 L59 0.5+ 0.2- 160102 G96 0.7- 0.1+ 160110 E07 0.1+ 0.2+ 240928 L59 0.0 0.5- 160102 G96 0.8- 0.1- 160110 E07 0.5+ 0.2+ 240928 L59 0.1+ 0.3+ 160103 691 0.8+ 0.1- 160111 G40 0.0 0.4- 240930 G96 0.0 0.1+ 160103 691 0.2- 0.2- 160111 G40 0.0 0.1+ 240930 G96 0.3+ 0.2+ 160103 691 0.3+ 0.6- 160112 U69 1.3+ 0.8- 240930 G96 0.0 0.1- 160103 448 1.9- 0.2- 160112 U69 1.0+ 1.3- 240930 G96 0.1- 0.4- 160103 448 0.2+ 0.4+ 160114 G96 0.2- 0.2+ 241003 L59 0.0 0.0 160103 448 0.9+ 1.0+ 160114 G96 0.3- 0.6+ 241003 L59 0.3- 0.2+ 160103 G96 0.5+ 0.3- 160114 G96 0.0 0.2+ 241003 L59 0.4- 0.4+ 160103 G96 0.5+ 0.2+ 160114 G96 0.3- 0.3+ 160103 G96 0.5+ 0.5- 160115 G96 0.4+ 1.2+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2024 Oct. 23