Nakano Note (Nakano wa Kangaeru noda) NK 3366 P/Wiegert-PANSTARRS (2016 P2 = 1998 U8 = 2007 R11)
The following improved orbital elements, by S. Nakano, are from 52 observations 1998 to 2016. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.55 arc second. Residuals from an orbit in HICQ 2017 were -0.34, -0.18 deg for 2007 observations and -0.47, -0.34 deg for 1998 observations. The comet has passed 0.60 AU from Jupiter on 2001 Nov. 28 UT. Epoch = 2015 Dec. 4.0 TT T = 2015 Nov. 16.62025 +/- 0.00987 (m.e.) TT Peri. = 352.34185 +/- 0.00139 Node = 283.50393 +/- 0.00051 (2000.0) Inc. = 12.78893 +/- 0.00016 q = 3.1215476 +/- 0.0000282 AU e = 0.2954305 +/- 0.0000060 a = 4.4304322 +/- 0.0000124 AU n' = 0.10569025 +/- 0.00000044 P = 9.325 +/- 0.0000392 years T = 1997 Nov. 9.26522 TT Epoch = 1997 Nov. 8.0 TT Peri. = 357.82055 e = 0.3248550 Node = 289.58624 (2000.0) a = 4.3546533 AU Inc. = 12.16064 n'= 0.10846102 q = 2.9400224 AU P = 9.087 years T = 2006 Aug. 2.00894 TT Epoch = 2006 Aug. 13.0 TT Peri. = 352.38656 e = 0.2965659 Node = 283.48917 (2000.0) a = 4.4166358 AU Inc. = 12.80376 n'= 0.10618586 q = 3.1068124 AU P = 9.282 years The predicted orbit for the 2025 return is as follows: T = 2025 Mar. 26.17974 TT Epoch = 2025 Mar. 26.0 TT Peri. = 352.56297 e = 0.2947209 Node = 283.38618 (2000.0) a = 4.4407222 AU Inc. = 12.77906 n'= 0.10532311 q = 3.1319486 AU P = 9.358 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1998/ 160809 568 0.0 0.1+ 160812 658 0.1+ 0.5+ 981018 699 0.5+ 0.9+ 160810 W96 1.6- 0.0 160822 215 1.2+ 0.0 981018 699 1.2- 0.2- 160810 W96 0.8- 0.7- 160822 215 0.2+ 0.3- 981018 699 0.2- 1.3+ 160810 U69 1.4+ 0.4+ 160822 215 0.4- 0.5- 2007/ 160810 U69 1.9+ 0.2+ 160824 A71 0.6+ 0.5- 070914 568 0.1+ 0.8- 160810 U69 1.8+ 0.2+ 160824 A71 1.0- 0.9- 070914 568 0.1+ 0.9- 160810 U69 1.8+ 0.0 160824 K77 0.4+ 0.1- 2016/ 160810 A71 0.2- 1.1- 160824 K77 1.4+ 0.7+ 160709 F51 0.1- 0.2- 160810 A71 0.9+ 0.1- 160824 K77 0.8+ 0.6+ 160709 F51 0.2- 0.1+ 160810 A77 1.6- 1.5- 160826 A71 0.9- 0.3- 160709 F51 0.2- 0.1- 160811 A77 (1.4+ 6.4-) 160826 A71 0.7- 0.7- 160709 F51 0.3- 0.1+ 160811 A77 1.0+ 1.7- 160826 K51 0.1+ 0.2+ 160808 F51 0.0 0.1+ 160811 A77 1.4- 1.9- 160826 K51 0.5+ 0.2- 160808 F51 0.0 0.0 160812 104 (1.8- 2.6-) 160826 K51 0.3- 0.1+ 160808 F51 0.2- 0.0 160812 104 (2.0- 2.4-) 160830 F51 0.2+ 0.2+ 160808 F51 0.1- 0.2+ 160812 H21 0.4+ 0.4- 160830 F51 0.2+ 0.2+ 160809 H21 0.1- 0.5- 160812 H21 0.2+ 0.5- 160830 F51 0.2+ 0.1+ 160809 H21 0.3- 0.5- 160812 H21 0.4- 0.5- 160830 F51 0.0 0.2+ 160809 H21 0.1- 0.5- 160812 658 0.1+ 0.4+ 160809 568 0.0 0.1+ 160812 658 0.0 0.4+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2017 June 7