Nakano Note (Nakano wa Kangaeru noda) NK 3921 C/2019 J1 (Lemmon)
The following improved orbital elements, by S. Nakano, are from 110 observations 2019 May 4 to Oct. 30. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.46 arc second. The comet has passed 2.89 AU from Jupiter on 2019 Feb. 18 UT. Epoch = 2019 Apr. 27.0 TT T = 2019 Apr. 9.36032 +/- 0.00160 (m.e.) TT Peri. = 167.80099 +/- 0.00061 Node = 98.08701 +/- 0.00009 (2000.0) Inc. = 24.54879 +/- 0.00014 q = 2.4786933 +/- 0.0000106 AU e = 0.9655372 +/- 0.0000191 1/a = +0.0139036 +/- 0.0000077 1/AU origin = +0.015416 (Q= 7) future = +0.015283 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2019/ 190508 I52 0.2+ 0.2- 190602 G96 0.3- 0.1- 190504 G96 0.1+ 0.1- 190508 N55 0.6- 0.2- 190602 G96 0.5+ 0.2- 190504 G96 0.1- 0.9+ 190508 N55 0.2- 0.9+ 190602 G96 0.7+ 0.1- 190504 G96 0.4- 0.1- 190508 N55 0.9- 0.8+ 190614 215 0.4- 0.3+ 190504 G96 0.1+ 0.2- 190508 N55 0.2- 0.9+ 190614 215 0.5- 0.6+ 190505 G96 0.1- 0.5- 190509 X74 0.4- 0.2+ 190614 215 0.1- 0.5+ 190505 G96 0.2- 0.1- 190509 X74 0.9+ 0.1+ 190623 703 1.3+ 1.1- 190505 G96 0.1+ 0.5+ 190509 X74 0.7+ 0.3- 190623 703 0.4- 0.2+ 190505 G96 0.2- 0.2- 190509 I52 1.1+ 1.5- 190623 703 1.7- 0.2+ 190505 I52 (1.0+ 2.3-) 190509 I52 0.2- 1.0- 190623 703 (2.5- 0.0 ) 190505 I52 0.1+ 0.1- 190509 I52 0.1+ 0.5- 190701 474 0.2+ 0.0 190505 I52 0.3+ 0.0 190509 I52 (0.3+ 2.0-) 190701 474 0.1+ 0.1- 190505 Q62 0.5+ 0.1+ 190509 C42 0.1- 0.1- 190701 474 0.3- 0.1- 190505 Q62 0.4+ 0.0 190509 C42 0.5+ 0.4- 190725 474 0.0 0.0 190505 Q62 0.1+ 0.1- 190509 C42 0.9+ 0.4- 190725 474 0.1- 0.1- 190505 Q62 0.4+ 0.1- 190509 C42 0.5+ 0.3- 190725 474 0.1- 0.1- 190506 G40 0.3- 0.4+ 190509 C42 0.1- 1.2+ 190725 474 0.1+ 0.2- 190506 G40 0.0 0.3+ 190510 I47 0.1+ 0.0 190727 T08 0.6+ 0.3- 190506 G40 0.0 0.5- 190510 I47 0.4+ 0.0 190727 T08 0.0 0.0 190506 H06 0.1+ 0.1- 190510 I47 0.5- 0.4- 190727 T08 0.1- 0.4+ 190506 H06 0.3- 0.1- 190511 L01 0.4+ 0.3- 190727 T08 0.4+ 0.3+ 190506 I52 1.0- 1.0+ 190511 L01 0.2+ 0.1- 190727 Q62 0.1- 0.2- 190506 I52 0.2- 0.2+ 190511 L01 1.1- 0.1- 190727 Q62 0.1- 0.4- 190506 I52 0.1+ 0.2- 190511 L01 1.3- 0.6- 190730 W89 0.1- 0.1- 190506 Q62 0.0 0.6+ 190511 L01 0.0 1.8+ 190730 W89 0.2- 0.0 190506 Q62 0.3- 0.5+ 190511 W88 0.6- 0.2+ 190730 W89 0.2- 0.2+ 190506 Q62 0.2- 0.2- 190511 W88 0.5- 0.3+ 190822 T05 0.3+ 0.3- 190506 Q62 0.2+ 0.1+ 190511 I52 0.8+ 0.1+ 190822 T05 0.1- 0.8+ 190506 Q62 0.5+ 0.2- 190511 I52 0.8- 0.4- 190822 T05 0.0 0.2+ 190507 I47 0.2+ 0.3+ 190511 I52 0.0 0.7- 190822 T05 0.0 0.1- 190507 I47 0.1+ 0.1+ 190511 I52 0.0 0.0 191002 474 0.1+ 0.1+ 190507 I47 0.2+ 0.1- 190511 N55 0.7+ 0.6+ 191002 474 0.1+ 0.3- 190507 Q11 0.2+ 0.4- 190511 N55 0.1+ 0.4+ 191002 474 0.1- 0.3- 190507 Q11 0.3- 0.4- 190512 C95 0.3- 0.3- 191002 474 0.1- 0.7- 190507 Q11 0.2+ 0.5- 190512 C95 0.4+ 0.3+ 191030 474 0.3+ 0.1+ 190508 I52 0.1- 0.1- 190512 N55 0.2- 0.1+ 191030 474 0.0 0.2+ 190508 I52 0.4+ 0.5+ 190512 N55 0.1+ 0.2+ 191030 474 0.1+ 0.4+ 190508 I52 0.6+ 0.7- 190602 G96 0.5- 0.5- 191030 474 0.0 0.5+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2019 Nov. 7