Nakano Note (Nakano wa Kangaeru noda) NK 4112 C/2017 C2 (PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 96 observations 2016 June 6 to 2017 Nov. 23. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.57 arc second. The comet has passed 3.15 AU from Saturn on 2014 Apr. 28 UT. See the previous orbit in NK 3452. Epoch = 2017 Jan. 7.0 TT T = 2017 Jan. 21.61316 +/- 0.00028 (m.e.) TT Peri. = 138.77435 +/- 0.00010 Node = 249.81963 +/- 0.00002 (2000.0) Inc. = 118.58313 +/- 0.00004 q = 2.4309958 +/- 0.0000027 AU e = 0.9752706 +/- 0.0000049 1/a = +0.0101725 +/- 0.0000020 1/AU a = 98.30 AU P = 974.7 years origin = +0.010176 (Q= 8) future = +0.010552 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2016/ 170215 246 0.4+ 0.1+ 170217 K38 0.2+ 0.1- 160606 695 0.7+ 0.0 170215 246 0.2+ 0.1- 170217 C77 0.9+ 0.2- 160606 695 0.6+ 0.1+ 170215 246 0.3+ 0.6+ 170217 Z84 0.3- 0.1- 2017/ 170215 246 0.0 1.2- 170217 Z84 0.2- 0.0 170204 F51 0.4- 0.0 170215 246 0.6+ 0.1- 170217 K38 0.1+ 0.1- 170204 F51 0.2- 0.2+ 170215 246 0.8- 0.0 170218 Z80 0.6+ 1.0- 170204 F51 0.2- 0.1+ 170215 106 0.1+ 0.3- 170218 Z80 0.2+ 0.0 170206 H06 1.8- 1.7+ 170215 246 0.2+ 0.4- 170218 Z80 0.1+ 0.5- 170206 H06 1.7- 1.6+ 170215 106 0.2+ 0.7- 170221 H06 0.4+ 0.6- 170214 T05 0.0 1.0- 170215 B15 0.8+ 0.1- 170221 H06 0.4+ 0.6- 170214 T05 0.4+ 0.4- 170215 B15 0.7+ 0.0 170221 H06 0.3+ 0.7- 170214 T05 1.2- 1.6- 170215 B15 0.8+ 0.2- 170221 372 0.1- 0.3- 170214 T05 0.2+ 1.2- 170215 B15 0.8+ 0.4- 170221 372 0.0 0.3- 170214 246 1.7+ 0.6- 170215 Z21 0.7+ 0.1+ 170315 U69 0.7+ 1.2+ 170214 246 0.4+ 0.5- 170215 Z21 0.3+ 0.2+ 170315 U69 1.0+ 0.9+ 170214 246 0.9+ 0.1- 170215 C10 (3.4+ 0.3-) 170315 U69 1.2+ 0.7+ 170214 246 1.2+ 0.6+ 170215 Z21 0.6+ 0.1+ 170326 H06 0.6+ 0.0 170214 246 0.4- 0.3+ 170215 C10 0.2+ 0.2+ 170326 H06 0.5+ 0.3+ 170214 246 0.9+ 0.1- 170215 C10 0.3+ 0.6- 170326 H06 0.4+ 0.5+ 170214 246 0.0 0.7- 170216 K88 0.4+ 0.3+ 170328 568 0.3- 0.1+ 170214 246 (2.0+ 0.5-) 170216 K88 0.2- 0.1- 170328 568 0.3- 0.1+ 170214 246 1.2+ 0.6- 170216 215 0.1+ 0.9- 170328 568 0.3- 0.2+ 170214 Z21 0.3- 0.1+ 170216 215 0.8- 0.2+ 170328 568 0.3- 0.1+ 170214 Z21 0.4- 0.3+ 170216 215 1.1- 0.8- 170821 568 0.1- 0.0 170214 Z21 0.0 0.2+ 170216 A71 1.7+ 0.2- 170821 568 0.1- 0.0 170214 Z21 0.1+ 0.3+ 170216 A71 0.4+ 0.6- 170917 568 0.0 0.1+ 170214 Z21 0.1+ 0.1- 170216 595 0.6+ 0.3+ 170917 568 0.0 0.0 170214 Z21 0.3+ 0.1+ 170216 595 1.1+ 0.2+ 171116 568 0.0 0.1- 170215 300 1.0+ 1.5+ 170216 G40 0.5- 0.3- 171116 568 0.0 0.1- 170215 300 1.0+ 0.6+ 170216 595 0.7+ 0.3+ 171123 W84 0.0 0.3- 170215 300 1.3+ 0.5+ 170216 G40 0.3- 0.1- 171123 W84 0.0 0.2+ 170215 106 1.1- 0.1+ 170217 K38 0.2- 0.3- 171123 W84 0.0 0.0 170215 246 0.1- 0.5- 170217 C77 0.7+ 0.0 170215 106 0.6+ 0.5- 170217 C77 0.3+ 0.2+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2020 June 1