Nakano Note (Nakano wa Kangaeru noda) NK 3763 C/2018 EF9 (Lemmon)

The following improved orbital elements, by S. Nakano, are from 176 observations 2018 Mar. 9 to Sept. 11. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.62 arc second. The comet has passed 3.92 AU from Jupiter on 2017 Sept. 21 UT. Epoch = 2018 June 11.0 TT T = 2018 May 23.13000 +/- 0.00017 (m.e.) TT Peri. = 72.61773 +/- 0.00010 Node = 172.57782 +/- 0.00002 (2000.0) Inc. = 84.69424 +/- 0.00003 q = 1.5566286 +/- 0.0000014 AU e = 0.9975669 +/- 0.0000042 1/a = +0.0015630 +/- 0.0000027 1/AU origin = +0.002377 (Q= 8) future = +0.002423 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2018/ 180319 I52 0.3- 0.1- 180511 A71 0.1- 0.7- 180309 G96 0.3+ 0.6- 180319 I52 0.4+ 0.4+ 180511 A71 0.0 0.1- 180309 G96 0.7- 0.7- 180319 I52 0.8- 1.1- 180511 A71 0.4+ 0.6- 180309 G96 0.1- 0.7+ 180319 I52 0.7- 0.5- 180511 A71 0.3- 0.2+ 180309 G96 0.0 0.5- 180319 711 0.3+ 0.3- 180511 A71 0.8+ 0.2+ 180309 G96 1.0+ 1.0+ 180319 711 1.4- 0.7+ 180513 I81 0.1+ 0.1+ 180309 G96 0.2+ 0.5+ 180319 711 0.4- 0.8+ 180513 I81 0.4+ 0.3- 180309 G96 0.4+ 1.0+ 180320 I52 0.9+ 0.5+ 180514 J01 1.3- 0.2+ 180309 G96 0.5+ 0.7- 180320 I52 0.2+ 0.4- 180514 J01 1.5- 0.6+ 180309 G96 0.0 1.0- 180320 I52 0.2+ 0.9+ 180514 J01 1.2+ 1.1- 180309 G96 0.3+ 0.9+ 180320 I52 0.4- 0.2+ 180514 J01 0.3+ 0.4+ 180309 H01 0.1+ 0.5+ 180320 711 0.3+ 0.1+ 180515 I81 0.5+ 0.8+ 180309 H01 0.1+ 0.4+ 180320 711 0.3+ 0.3- 180515 I81 0.5+ 0.9+ 180309 H01 0.0 0.5+ 180321 711 0.5+ 0.5+ 180515 I81 0.2- 0.0 180309 H01 0.0 0.5+ 180321 711 0.7+ 0.4+ 180515 L27 0.6- 0.6- 180310 G96 0.6- 0.5+ 180321 711 0.2+ 0.6+ 180515 L27 1.2- 1.1- 180310 G96 0.3+ 0.7+ 180322 I52 0.6+ 0.7- 180515 L27 0.6- 0.2- 180310 G96 0.1- 0.4+ 180322 I52 0.0 0.3+ 180517 H06 0.5+ 0.7+ 180310 H21 0.4- 0.3+ 180322 I52 0.1+ 0.4- 180517 H06 0.1- 0.2+ 180310 H21 0.4- 0.0 180322 I52 0.3- 0.3- 180518 C10 0.3- 0.6+ 180310 H21 0.3- 0.1+ 180323 595 0.1- 0.9- 180518 C10 0.9+ 0.7+ 180310 F51 0.4+ 0.2+ 180323 595 0.1+ 0.3- 180519 Q11 0.0 0.6+ 180310 F51 0.0 0.2- 180324 I52 0.6+ 1.5- 180519 Q11 0.0 0.6+ 180313 033 0.0 0.6+ 180324 I52 0.1- 1.0- 180519 Q11 0.2+ 0.7+ 180313 033 0.0 0.4+ 180324 I52 0.3- 1.4- 180519 349 0.9- 0.2- 180313 033 0.3- 0.5+ 180327 I52 0.4+ 0.2- 180519 349 0.4- 0.5+ 180313 033 0.1- 0.3+ 180327 I52 0.5- 0.4- 180519 C10 0.0 1.1+ 180313 033 0.0 0.5+ 180327 I52 0.4- 0.3- 180519 C10 0.8- 0.8+ 180313 033 0.4- 0.0 180328 I52 (5.0- 0.1-) 180520 K77 1.2- 0.1- 180313 I52 0.3- 0.2- 180328 I52 1.6- 1.4- 180520 K77 1.7- 1.9- 180313 I52 0.3+ 0.0 180328 I52 1.1- 0.5- 180520 A71 0.2+ 0.1+ 180313 I52 0.5- 1.3- 180407 C51 0.3- 0.2+ 180520 A71 0.1- 0.3+ 180313 I52 0.5+ 0.2+ 180407 C51 1.5- 0.9+ 180520 A71 0.5- 0.0 180313 K88 0.7+ 0.9- 180407 C51 0.7+ 0.2+ 180520 A71 0.1- 0.7- 180313 K88 0.5+ 0.3- 180407 C51 1.5+ 0.4+ 180520 A71 0.0 1.2- 180315 033 0.1- 0.3+ 180407 C51 0.3+ 0.4- 180521 D81 0.5+ 0.7- 180315 033 0.1+ 0.4+ 180407 C51 1.8+ 0.1+ 180521 D81 1.2+ 0.8- 180315 033 0.2- 0.5+ 180408 C51 0.8+ 1.4- 180521 D81 1.7+ 0.4+ 180315 033 0.3- 0.3+ 180408 C51 1.2+ 0.2+ 180521 D81 1.0+ 0.1+ 180315 033 0.2+ 0.1+ 180408 C51 0.1+ 0.9+ 180521 A71 0.1- 0.3- 180315 033 0.2- 0.1+ 180414 G37 0.2- 0.4+ 180521 A71 0.0 0.4- 180315 033 0.3- 0.0 180414 G37 0.3- 0.6+ 180521 A71 0.1- 0.0 180315 H06 0.5+ 0.4+ 180421 A71 (2.3+ 0.7-) 180601 D81 0.1+ 0.7- 180315 H06 0.4+ 0.0 180421 215 0.5- 0.7+ 180601 D81 0.5+ 0.0 180315 H06 0.0 0.2- 180421 215 0.4- 0.2+ 180601 D81 0.6+ 0.9+ 180316 I52 0.5- 0.6- 180421 215 0.7- 0.2- 180601 D81 0.5+ 0.3+ 180316 I52 1.0- 0.4+ 180421 A71 0.2- 0.6- 180601 L27 0.3+ 1.1+ 180316 I52 1.2- 0.7- 180422 Q11 0.1+ 0.1+ 180601 L27 0.1- 0.5+ 180316 I52 0.4- 0.9- 180422 Q11 0.4+ 0.1+ 180601 L27 1.5- 0.9+ 180316 658 0.8+ 0.4+ 180422 Q11 0.3+ 0.1- 180602 H06 0.2- 0.3- 180316 658 0.8+ 0.6+ 180424 H06 0.3- 0.2- 180602 H06 0.2- 0.2- 180316 658 0.8+ 0.7+ 180424 H06 0.7- 0.2+ 180603 A71 0.4- 0.6- 180317 I52 0.1+ 0.7- 180424 H06 0.9- 0.4+ 180603 A71 0.3- 0.4- 180317 I52 0.1+ 0.1- 180507 A71 1.2- 0.8+ 180603 A71 0.0 0.4- 180317 I52 0.2- 0.1- 180507 A71 1.1- 0.2- 180603 A71 0.1- 0.8- 180317 I52 0.8- 0.9- 180507 A71 0.6- 0.3- 180604 A71 0.7- 0.4- 180318 I52 0.7- 1.0- 180507 A71 1.5- 1.2- 180604 A71 0.0 0.3+ 180318 I52 0.8- 1.2- 180509 A71 0.5+ 0.4- 180911 568 0.1- 0.0 180318 I52 0.6- 0.5- 180509 A71 1.3+ 0.0 180911 568 0.1- 0.0 180318 I52 0.5- 0.4- 180509 A71 0.4+ 0.5- ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2018 Dec. 7

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