Nakano Note (Nakano wa Kangaeru noda) NK 3230 302P/Lemmon-PANSTARRS

The following improved orbital elements, by S. Nakano, are from 44 observations 2007 to 2016. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.41 arc second. The residuals of recent observations in 2016 were +38" for Right Ascension and +15" for Declination from a linked orbit in NK 2694 (= HICQ 2015) with the delta-T correction = -0.06 day. Epoch = 2016 May 12.0 TT T = 2016 Apr. 30.55403 +/- 0.01166 (m.e.) TT Peri. = 208.28217 +/- 0.00160 Node = 121.78464 +/- 0.00026 (2000.0) Inc. = 6.03091 +/- 0.00001 q = 3.3022220 +/- 0.0000218 AU e = 0.2284824 +/- 0.0000052 a = 4.2801643 +/- 0.0000095 AU n' = 0.11130468 +/- 0.00000037 P = 8.855 +/- 0.0000294 years T = 2007 July 4.72462 TT Epoch = 2007 June 29.0 TT Peri. = 208.21550 e = 0.2305385 Node = 121.83222 (2000.0) a = 4.2591119 AU Inc. = 6.03791 n'= 0.11213095 q = 3.2772227 AU P = 8.790 years The predicted orbit for the 2025 return is as follows: T = 2025 Mar. 9.44139 TT Epoch = 2025 Mar. 26.0 TT Peri. = 208.63181 e = 0.2294085 Node = 121.71559 (2000.0) a = 4.2676215 AU Inc. = 6.03570 n'= 0.11179573 q = 3.2885929 AU P = 8.816 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2007/ 070918 699 0.7- 0.2- 140522 568 0.1- 0.0 070816 D29 0.1- 1.0- 071002 E12 (2.4+ 0.6+) 140523 Q62 0.4- 0.2- 070816 D29 0.1- 0.8- 071002 E12 1.1+ 0.9+ 140523 Q62 0.1- 0.1+ 070816 D29 0.0 0.9- 071002 E12 0.9+ 1.6+ 140523 Q62 0.0 0.4+ 070816 D29 0.1- 0.6- 071002 E12 1.2+ 0.1+ 140531 F51 0.0 0.0 070913 G96 0.2- 0.3- 2014/ 140531 F51 0.0 0.1+ 070913 G96 0.4- 0.1- 140429 F51 0.1- 0.3+ 140531 F51 0.0 0.2- 070913 G96 0.1- 0.1+ 140429 F51 0.2+ 0.0 2016/ 070913 G96 0.3- 0.1- 140429 F51 0.1- 0.0 160703 Q62 0.6- 0.4- 070915 699 1.7- 0.2+ 140429 F51 0.0 0.0 160703 Q62 0.2- 0.2- 070915 699 0.3- 0.3- 140521 F51 0.0 0.1- 160703 Q62 0.4- 0.2- 070915 699 0.0 0.3+ 140521 F51 0.0 0.2- 160804 A71 0.9+ 0.6- 070915 699 0.3- 0.6+ 140521 F51 0.1+ 0.1- 160805 A71 0.7+ 0.2- 070918 699 1.9+ 1.5+ 140521 F51 0.2+ 0.2- 160813 215 0.0 0.0 070918 699 0.9- 1.0+ 140522 568 0.1- 0.1+ 160813 215 0.0 0.1- 070918 699 0.4- 0.2+ 140522 568 0.1- 0.0 160813 215 0.1+ 0.3- ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2016 Sept. 2

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