OAA computing section circular NK 3467 C/2017 F1 (Lemmon)
The following improved orbital elements, by S. Nakano, are from 67 observations 2017 Mar. 20 to Oct. 21. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.48 arc second. The comet has passed 1.43 AU from Jupiter on 2016 Mar. 12 UT. This orbit depends on one night observations for 2017 Oct. 21. Epoch = 2017 Nov. 23.0 TT T = 2017 Nov. 30.96495 +/- 0.01999 (m.e.) TT Peri. = 64.81212 +/- 0.00323 Node = 158.74265 +/- 0.00015 (2000.0) Inc. = 146.48106 +/- 0.00012 q = 4.4998264 +/- 0.0000632 AU e = 1.0043408 +/- 0.0000192 1/a = -0.0009647 +/- 0.0000043 1/AU origin = +0.000024 (Q= 8) future = -0.000276 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2017/ 170323 I52 0.3- 0.0 170329 I52 1.2+ 0.2- 170320 G96 0.7+ 0.5- 170323 I52 0.5- 0.1+ 170329 I52 (2.8+ 0.1-) 170320 G96 0.2- 0.3+ 170323 I52 0.9- 0.7- 170330 I52 0.3+ 0.4- 170320 G96 0.4+ 0.0 170323 926 0.4- 0.1+ 170330 I52 0.0 0.1- 170320 G96 0.8- 0.4- 170323 H06 0.1- 0.2+ 170330 I52 0.1- 0.7+ 170320 G96 0.2- 0.9+ 170323 926 0.2+ 0.2+ 170330 I52 0.6+ 0.3+ 170320 G96 0.2- 0.6+ 170323 H06 0.4+ 0.7+ 170331 I52 1.3- 0.1- 170320 G96 1.1- 0.1+ 170323 926 0.4+ 0.0 170331 I52 0.1+ 0.1+ 170320 G96 (2.0- 0.2-) 170324 I52 0.0 0.3+ 170331 I52 0.9- 0.8+ 170321 926 0.3+ 0.4+ 170324 I52 0.3+ 0.5- 170401 926 0.0 0.2+ 170321 G96 1.5- 1.0- 170324 I52 0.3- 0.2+ 170401 926 0.1- 0.7- 170321 G96 0.1- 0.6- 170325 I52 1.4+ 0.2+ 170517 215 0.4+ 1.0+ 170321 926 0.2- 0.3+ 170325 I52 0.7+ 0.2- 170517 215 0.1- 0.7+ 170321 926 0.0 0.7+ 170325 I52 0.0 0.2+ 170517 215 0.1- 0.5+ 170321 G96 0.9- 0.7- 170326 I52 1.6+ 0.4- 170518 568 0.2- 0.1- 170321 G96 0.5+ 0.0 170326 I52 0.5+ 0.5- 170518 568 0.2- 0.1- 170321 G96 1.0+ 0.0 170327 I52 0.8- 0.2- 170522 U69 1.9+ 0.3+ 170322 I52 0.6+ 0.2+ 170327 I52 0.3- 0.4- 170522 U69 1.6+ 0.3+ 170322 I52 0.6+ 0.3- 170327 I52 0.1- 0.0 171021 568 0.0 0.0 170322 H01 0.3- 0.1- 170327 I52 0.1- 0.2- 171021 568 0.0 0.1- 170322 H01 0.2- 0.0 170327 K51 0.3+ 0.1+ 171021 568 0.0 0.0 170322 H01 0.2- 0.0 170327 K51 0.5+ 0.1+ 171021 568 0.1+ 0.1+ 170322 H01 0.2- 0.1- 170327 K51 0.4+ 0.1+ 170323 I52 0.0 0.0 170329 I52 0.4- 0.9+ ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2017 Nov. 11