Nakano Note (Nakano wa Kangaeru noda) NK 3311 P/2015 D6 (Lemmon-PANSTARRS)
The following improved orbital elements, by T. Kobayashi, are from 34 observations 2015 Feb. 27 to 2015 May 19. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.51 arc second. The comet has passed 1.69 AU from Jupiter on 2013 Aug. 11 and will pass 1.16 AU from Saturn on 2028 May 23 UT. The previous orbit in HICQ 2015 (= HICQ 2016). Epoch = 2015 Aug. 6.0 TT T = 2015 July 21.21662 +/- 0.45721 (m.e.) TT Peri. = 126.54280 +/- 0.05577 Node = 46.21265 +/- 0.00345 (2000.0) Inc. = 20.20829 +/- 0.00059 q = 4.5607860 +/- 0.0003634 AU e = 0.3698692 +/- 0.0001665 a = 7.2378397 +/- 0.0020104 AU n' = 0.05061633 +/- 0.00002091 P = 19.472 +/- 0.0081263 years (+/- 2.97 days) The predicted orbit for the 2034 return is as follows: S. Nakano gives the next predicted T = 2034 Aug. 12.0 TT in HICQ 2015. T = 2034 Aug. 9.32843 TT Epoch = 2034 Aug. 26.0 TT Peri. = 125.53203 e = 0.3522540 Node = 44.67029 (2000.0) a = 7.1815749 AU Inc. = 20.52470 n'= 0.05121233 q = 4.6518364 AU P = 19.246 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2015/ 150317 H01 0.2- 0.3+ 150318 K51 0.2+ 0.2+ 150227 G96 0.3+ 0.0 150317 H01 0.2- 0.4+ 150318 K51 0.0 0.3+ 150227 G96 0.1+ 0.0 150317 H01 0.0 0.4+ 150318 106 0.6- 1.0- 150227 G96 0.1+ 0.2+ 150317 H01 0.1- 0.4+ 150319 106 0.6- 0.1- 150227 G96 0.2+ 0.1- 150317 568 0.3+ 0.2+ 150319 H06 0.9+ 1.2+ 150309 G96 0.9- 0.3+ 150317 568 0.3+ 0.2+ 150319 H06 1.0+ 0.7+ 150309 G96 0.2- 0.1+ 150317 568 0.3+ 0.2+ 150323 215 0.3- 0.3- 150309 G96 1.6- 0.9- 150317 F51 0.5+ 0.1- 150323 215 0.9- 0.3- 150309 G96 (2.3- 0.7-) 150317 F51 0.3+ 0.1- 150519 U69 0.1- 0.2+ 150316 F51 0.5+ 0.0 150317 F51 0.6+ 0.1- 150519 U69 0.1+ 0.2- 150316 F51 0.4+ 0.2- 150317 106 1.5- 0.9- 150612 867(19.3+ 6.3+) 150316 F51 0.5+ 0.2- 150317 106 0.1+ 1.0- 150612 867(19.4+ 6.9+) 150316 F51 0.3+ 0.0 150318 K51 0.2+ 0.2+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2017 Feb. 6