Nakano Note (Nakano wa Kangaeru noda) NK 5489 P/Lemmon-PANSTARRS (2015 TO19 = 2025 S4)
The following improved orbital elements, by S. Nakano, are from 93 observations 2006 to 2025. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.43 arc second. Residuals were -260" for Right Ascension and -70" for Declination from the prediction in NK 3319 (= CH 2025) by T. Kobayashi, Oizumi, with the delta-T correction = +0.26 day. The comet has passed 0.63 AU from Jupiter on 1984 Aug. 3 and will pass 0.60 AU from Jupiter on 2028 Aug. 27 UT. See the previous orbits in HICQ 2016 and NK 3319. Epoch = 2025 Nov. 21.0 TT T = 2025 Nov. 23.94467 +/- 0.00154 (m.e.) TT Peri. = 89.43716 +/- 0.00042 Node = 321.60550 +/- 0.00017 (2000.0) Inc. = 6.50493 +/- 0.00001 q = 2.9110709 +/- 0.0000009 AU e = 0.3597898 +/- 0.0000002 a = 4.5470550 +/- 0.0000020 AU n' = 0.10165032 +/- 0.00000007 P = 9.696 +/- 0.0000065 years T = 2006 May 24.89688 TT Epoch = 2006 May 25.0 TT Peri. = 89.16297 e = 0.3571520 Node = 321.83554 (2000.0) a = 4.5822322 AU Inc. = 6.49517 n'= 0.10048204 q = 2.9456789 AU P = 9.809 years T = 2016 Mar. 7.08276 TT Epoch = 2016 Feb. 22.0 TT Peri. = 89.31316 e = 0.3589126 Node = 321.64572 (2000.0) a = 4.5629194 AU Inc. = 6.49966 n'= 0.10112066 q = 2.9252300 AU P = 9.747 years The predicted orbit for the 2035 return is as follows: T = 2035 June 3.97271 TT Epoch = 2035 June 2.0 TT Peri. = 112.81265 e = 0.3690010 Node = 292.08106 (2000.0) a = 4.5802650 AU Inc. = 5.09000 n'= 0.10054678 q = 2.8901426 AU P = 9.802 years The following residuals in seconds of arc are from the above orbital elements: 2006/ 151014 568 0.1+ 0.1- 250919 W62 1.0+ 0.4+ 061121 645 0.3+ 0.4+ 151014 568 0.1+ 0.0 251017 W62 0.7- 0.1- 061121 645 0.3+ 0.4+ 151014 568 0.1+ 0.0 251017 W62 0.2- 0.0 061121 645 0.2+ 0.4+ 151014 291 0.2- 0.1+ 251017 W62 0.3+ 0.0 2015/ 151014 291 0.1+ 0.1+ 251017 W62 1.1+ 0.6+ 150619 W84 0.8+ 0.7+ 151014 Q62 1.2- 0.8- 251018 I47 0.9- 0.6- 150620 W84 0.7+ 0.5+ 151014 Q62 1.0- 0.7- 251018 I47 0.3+ 0.7+ 150912 F51 0.0 0.0 151014 Q62 0.4- 0.3- 251018 215 0.4+ 0.0 150912 F51 0.2- 0.2+ 151014 O75 0.2- 0.7- 251018 215 0.2+ 0.0 150912 F51 0.2+ 0.3+ 151014 O75 0.1- 0.8- 251018 215 0.1+ 0.1- 150912 F51 0.0 0.1+ 151014 O75 0.3- 0.8- 251019 W62 0.3- 0.4- 151003 G96 0.5+ 0.2- 151014 958 0.1+ 0.1+ 251019 W62 0.4- 0.3- 151003 G96 0.2+ 0.4- 151014 958 0.3+ 0.6- 251019 W62 0.4- 0.3- 151003 G96 0.0 0.0 151014 958 0.4- 0.8- 251019 I47 0.7- 0.3- 151003 G96 0.1+ 0.4- 151110 H06 0.7+ 0.9- 251019 I47 0.1- 0.3+ 151004 G96 0.1- 0.3- 151110 H06 0.4+ 1.0- 251021 W62 0.3- 0.2- 151004 G96 0.1- 0.5- 151110 H06 0.6+ 0.9- 251021 W62 0.3- 0.2- 151004 G96 0.4- 0.7- 151111 215 0.6+ 0.2+ 251021 W62 0.4- 0.2- 151004 G96 0.3- 1.0- 151111 215 0.8+ 0.3- 251025 W62 0.3- 0.1- 151008 703 0.2- 0.5- 151111 215 1.1+ 0.7- 251025 W62 0.0 0.3- 151008 703 1.0- 0.1- 151212 J43 0.9+ 0.6- 251025 W62 0.1+ 0.2- 151010 G45 1.6- 0.3- 151212 J43 1.0+ 0.2+ 251026 G96 0.1+ 0.2- 151010 G45 0.0 0.3- 151212 J43 0.1- 0.2+ 251026 G96 0.1+ 0.1+ 151010 G45 0.3- 0.2- 151212 J43 0.5+ 0.0 251026 G96 0.0 0.1- 151010 G45 0.1- 0.1+ 2016/ 251026 G96 0.0 0.1+ 151010 G45 0.0 0.0 160812 U69(32.1- 6.5+) 251027 W62 0.3- 0.3- 151012 F51 0.0 0.1+ 160812 U69(32.7- 6.4+) 251027 W62 0.3- 0.3- 151012 F51 0.1- 0.2+ 160812 U69(32.7- 6.2+) 251027 W62 0.3- 0.2- 151012 F51 0.2- 0.2+ 160812 U69 0.3- 1.1+ 251031 C10 0.2+ 0.5+ 151012 F51 0.0 0.1+ 160812 U69 0.2+ 0.9+ 251031 C10 0.1+ 0.1- 151013 F51 0.1- 0.2+ 161228 W84 0.0 0.3+ 251031 C10 0.3- 0.2+ 151013 F51 0.1- 0.1+ 2025/ 251031 C10 0.4- 0.2+ 151013 F51 0.0 0.2+ 250919 W62 1.0+ 0.7- 151013 F51 0.1- 0.1+ 250919 W62 1.4+ 0.5+ ( ) -------- Rejected Obs.
Associate of the CBAT Late edition Syuichi Nakano 2025 Nov. 6