Nakano Note (Nakano wa Kangaeru noda) NK 5320 P/Spacewatch-PANSTARRS (2011 UA134 = 2024 T4)
The following improved orbital elements, by S. Nakano, are from 136 observations 2011 to 2024. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.60 arc second. Residuals for recovery observations were +0.60 deg for Right Ascension and +0.34 deg for Declination from the prediction in NK 2207 (= CH 2024) with the delta-T correction = -1.29 days. The comet has passed 0.90 AU from Jupiter on 1997 May 20 UT. Also comet has passed 0.81 AU from Jupiter on 1922 September and 1.76 AU from Saturn 1928 February. See the previous orbits in NK 2207 and CBET 5464 (same orbit). Epoch = 2025 Feb. 14.0 TT T = 2025 Feb. 15.36967 +/- 0.00272 (m.e.) TT Peri. = 32.41550 +/- 0.00078 Node = 40.38396 +/- 0.00006 (2000.0) Inc. = 10.43802 +/- 0.00003 q = 2.0752175 +/- 0.0000030 AU e = 0.6305637 +/- 0.0000005 a = 5.6172545 +/- 0.0000109 AU n' = 0.07403173 +/- 0.00000022 P = 13.313 +/- 0.0000388 years T = 2011 Dec. 7.20483 TT Epoch = 2011 Dec. 25.0 TT Peri. = 32.32930 e = 0.6325168 Node = 40.63547 (2000.0) a = 5.5821671 AU Inc. = 10.53802 n'= 0.07473083 q = 2.0513528 AU P = 13.189 years The predicted orbit for the 2038 return is as follows: T = 2038 Apr. 22.55155 TT Epoch = 2038 Apr. 7.0 TT Peri. = 32.16259 e = 0.6309925 Node = 40.33656 (2000.0) a = 5.5768715 AU Inc. = 10.43314 n'= 0.07483730 q = 2.0579072 AU P = 13.170 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2011/ 111124 568 0.1- 0.1+ 111205 C32 0.6- 0.7- 111024 691 0.9- 0.2- 111124 568 0.0 0.1+ 111216 C32 0.0 0.8+ 111024 691 0.3- 0.5+ 111125 300 0.3+ 0.1- 111216 C32 0.5+ 0.1- 111024 691 1.2- 0.1- 111125 300 0.3+ 0.2- 111217 J24 1.5- 1.4- 111025 F51 0.1+ 0.1- 111125 300 0.2- 0.1- 111217 J24 0.6- 1.4- 111025 F51 0.2+ 0.1- 111125 300 0.1+ 0.0 111217 J24 0.4+ 0.9- 111025 F51 0.1+ 0.1- 111125 D29 0.3- 0.4- 111220 118 0.2+ 0.2- 111025 F51 0.3+ 0.1- 111125 D29 1.1- 1.2- 111220 118 1.1- 0.1- 111026 926 0.5+ 0.3+ 111125 D29 0.3- 0.2- 111220 561 0.1+ 0.3- 111026 926 0.1- 1.5+ 111127 703 1.8- 1.6- 111220 561 0.6+ 0.2- 111026 926 0.4+ 0.7+ 111127 703 (2.3- 0.8-) 111220 561 0.4+ 0.2+ 111026 926 0.5- 0.5+ 111127 703 1.3- 0.4+ 111220 561 0.4+ 0.2+ 111026 926 0.5+ 0.4+ 111127 703 1.4- 1.4- 111220 561 1.4+ 0.3+ 111026 926 0.3+ 0.3- 111127 215 0.9- 0.7- 111224 D88 1.3+ 1.2- 111026 926 0.2+ 0.0 111127 215 0.8- 0.9- 111224 D88 0.4+ 1.1+ 111026 568 0.0 0.1+ 111127 215 0.7- 1.0- 111224 349 1.3+ 0.2+ 111026 568 0.0 0.1+ 111127 A71 0.6- 0.8+ 111224 372 0.7+ 0.1+ 111026 568 0.0 0.1+ 111127 A71 0.5- 0.2- 111224 349 1.3+ 0.7+ 111026 568 0.1+ 0.1+ 111129 046 0.2- 0.1+ 111224 372 0.6+ 0.3- 111026 568 0.0 0.1+ 111129 046 0.2+ 0.3+ 111224 372 0.6- 0.5+ 111026 568 0.0 0.1+ 111129 046 0.1+ 0.4+ 111226 D95 0.9+ 0.7+ 111029 204 0.4- 0.1- 111129 046 0.5- 0.5- 111226 D95 0.4- 0.0 111029 204 0.3- 0.1- 111129 046 0.3- 0.0 111227 130 0.0 0.7+ 111029 B18 0.1+ 0.3- 111129 046 0.1+ 0.2- 111227 130 0.6+ 0.3+ 111029 B18 0.1- 0.5+ 111129 046 0.8- 0.8- 111227 130 0.5+ 0.1+ 111029 B18 0.5- 0.8+ 111129 G96 0.3- 0.3- 2012/ 111030 H21 0.1- 0.1- 111129 G96 0.1- 0.3- 120101 349 1.4+ 0.2- 111030 H21 0.7- 0.1+ 111129 G96 0.0 0.2- 120101 349 1.6+ 0.4- 111030 H21 0.3- 0.2- 111130 H45 (0.5+ 3.3-) 120111 G96 0.1+ 1.6+ 111030 H21 0.1- 0.2- 111130 H45 1.2+ 0.7- 120111 G96 0.8- 1.0+ 111030 H06 0.3- 0.8- 111130 H45 0.8+ 0.4+ 120111 G96 0.3+ 0.6+ 111030 H06 0.8- 0.4- 111130 H45 0.5+ 1.1+ 120126 215 0.4+ 0.7- 111031 C32 0.3- 0.3+ 111130 H45 0.5+ 0.2+ 120126 215 0.6+ 0.3- 111031 C32 0.4- 0.2+ 111130 H45 0.4+ 0.9+ 120127 561 1.2- 0.3+ 111031 C32 0.3- 0.3+ 111202 I89 0.9+ 0.1+ 120127 561 (2.2- 1.1+) 111103 C32 0.6- 0.3- 111202 I89 0.8+ 0.7+ 120127 561 (2.5+ 1.8+) 111103 C32 0.5+ 0.8+ 111203 J47 0.5- 0.2- 2024/ 111103 C32 0.2- 0.3+ 111203 J47 0.7- 0.1+ 241005 G96 0.0 0.5+ 111103 C32 0.7- 0.0 111203 J47 0.5- 0.1+ 241005 G96 0.1- 0.3+ 111123 H06 0.1+ 0.0 111203 J47 0.1+ 1.1+ 241005 G96 0.1- 0.1+ 111123 H06 0.2+ 0.3- 111203 D29 1.5- 1.0+ 241005 G96 0.2+ 0.4+ 111123 H06 0.2+ 0.3- 111203 D29 0.3+ 1.0- 241009 F52 0.0 0.1- 111123 703 0.0 1.0+ 111203 D29 0.1- 0.9- 241009 F52 0.1+ 0.3- 111123 703 (2.4- 0.1-) 111204 J01 0.1- 0.0 241009 F52 0.0 0.2- 111123 349 0.3- 0.3+ 111204 J01 0.2+ 0.1- 241010 F52 0.0 0.0 111123 349 0.1+ 0.3+ 111204 J01 0.5+ 0.6- 241010 F52 0.0 0.3- 111123 349 0.1+ 0.1- 111205 C32 0.6- 0.9- 241010 F52 0.1- 0.1+ 111124 568 0.0 0.1+ 111205 C32 0.1- 1.5- 241010 F52 0.1+ 0.7- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2024 Oct. 23