Nakano Note (Nakano wa Kangaeru noda) NK 4366 P/STEREO (2016 J3 = 2021 Ax)
The following improved orbital elements, by S. Nakano, are from 137 observations 2016 to 2021. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The weighting mean residual is +/- 2.17 arc seconds. Identification with ZTF0Ion (Object in 2020/2021) found by M. Meyer. An orbit computed from 2020/2021 observations shows the 2016 residual for first observation of +6.5 deg for Right Ascension and +2.0 deg for Declination with the delta-T correction = +1.62 days. The comet will pass 0.88 AU from Jupiter on 2031 Dec. 6 UT. See a linked orbit in CBET xxxx (same orbit). Epoch = 2021 Jan. 26.0 TT T = 2021 Jan. 25.38557 +/- 0.00016 (m.e.) TT Peri. = 210.73355 +/- 0.00058 Node = 257.79093 +/- 0.00012 (2000.0) Inc. = 23.38321 +/- 0.00022 q = 0.5263740 +/- 0.0000031 AU e = 0.8116913 +/- 0.0000011 a = 2.7952714 +/- 0.0000233 AU n' = 0.21089589 +/- 0.00000264 P = 4.673 +/- 0.0000584 years T = 2016 May 23.17130 TT Epoch = 2016 May 12.0 TT Peri. = 210.65484 e = 0.8103819 Node = 257.84541 (2000.0) a = 2.7992624 AU Inc. = 23.38940 n'= 0.21044502 q = 0.5307909 AU P = 4.683 years The predicted orbit for the 2025 return is as follows: T = 2025 Sept.26.32601 TT Epoch = 2025 Oct. 12.0 TT Peri. = 210.70772 e = 0.8122957 Node = 257.81704 (2000.0) a = 2.7924792 AU Inc. = 23.40626 n'= 0.21121227 q = 0.5241604 AU P = 4.666 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2016/ 160512 C49 2.4- 0.2+ 160513 C49 3.9+ 6.5+ 160511 C49 (2.9- 8.5-) 160512 C49 3.9- 0.2+ 160513 C49 (6.9+ 16.0+) 160511 C49(11.1+ 3.7-) 160512 C49 2.7- 3.2+ 160513 C49(19.9+ 39.8+) 160511 C49 2.3+ 2.0- 160512 C49 2.5+ 0.1+ 160513 C49 (4.8- 14.0+) 160511 C49 (8.3- 0.3-) 160512 C49 0.9- 2.0+ 160513 C49 (5.6- 10.5+) 160511 C49 (4.0+ 12.7+) 160512 C49 4.5- 2.1- 160513 C49 (0.4- 14.3+) 160511 C49 (8.9+ 0.9+) 160512 C49 4.3- 1.6- 160513 C49(13.9+ 1.9+) 160511 C49 6.1+ 4.5- 160512 C49 4.0- 1.7- 160513 C49(10.8+ 18.8+) 160511 C49 2.6+ 3.0- 160512 C49 1.7+ 4.7+ 160513 C49 (2.9+ 12.0-) 160511 C49 1.4+ 1.5- 160512 C49 3.2+ 6.8+ 160513 C49(11.8- 3.1-) 160511 C49 (9.1- 8.8+) 160512 C49 1.4+ 2.6+ 160513 C49 4.6- 4.3+ 160511 C49 0.9- 0.6+ 160512 C49 3.2- 2.8- 160513 C49 (8.4- 16.2+) 160511 C49 (8.1- 10.7-) 160512 C49 1.3+ 5.8+ 160513 C49 (5.6- 25.2-) 160511 C49 2.6- 3.2+ 160512 C49 2.8- 3.4+ 160513 C49 (3.1- 10.1+) 160511 C49 6.1- 1.7- 160512 C49 5.2+ 3.7+ 160513 C49(17.7- 3.3-) 160511 C49 2.9- 0.0 160512 C49 (4.9- 8.0+) 160513 C49 6.0+ 1.2+ 160511 C49 2.3+ 2.5- 160512 C49 0.4+ 4.8+ 160513 C49 5.9- 2.4+ 160511 C49 2.5+ 4.4- 160512 C49 6.0- 0.5+ 160513 C49(17.9- 12.9+) 160511 C49 5.0+ 2.3- 160512 C49 0.8+ 2.9- 2020/ 160511 C49 5.6+ 0.3+ 160512 C49 6.7- 6.9+ 201219 G96 0.0 1.0+ 160511 C49 (4.0- 8.2-) 160512 C49 0.4- 6.1- 201219 G96 0.0 0.1- 160511 C49 (8.3+ 3.3+) 160512 C49 2.4+ 2.0- 201219 G96 0.2- 0.2+ 160511 C49(14.5+ 0.6-) 160512 C49 5.9- 0.6- 2021/ 160511 C49 3.6+ 4.4- 160512 C49 (1.8- 9.5-) 210104 I41 0.1+ 0.2+ 160511 C49 1.7+ 4.6- 160512 C49 3.4+ 4.6+ 210104 I41 0.4- 0.0 160511 C49 5.3- 5.0- 160512 C49 (9.6- 2.7-) 210104 I41 0.4- 0.2+ 160511 C49 3.4+ 2.7+ 160512 C49 0.3+ 7.0+ 210104 I41 0.1- 0.0 160511 C49 3.0- 1.1- 160512 C49 5.0- 0.8- 210105 I41 0.2+ 0.4- 160511 C49 4.2- 3.5- 160512 C49 4.1- 0.1+ 210105 I41 0.1+ 0.3- 160511 C49 (9.8- 2.7+) 160512 C49 1.4- 2.9- 210105 I41 0.4+ 0.2- 160511 C49 4.1- 1.2+ 160512 C49 2.2+ 5.4+ 210105 I41 0.3- 0.7- 160511 C49 2.0+ 3.2- 160512 C49 3.9- 4.0- 210107 K88 1.3+ 1.1+ 160512 C49 1.4- 1.9- 160512 C49 (5.0- 8.5+) 210107 K88 0.4- 0.2+ 160512 C49 0.3- 2.0+ 160512 C49 1.0+ 3.6+ 210107 K88 0.5+ 0.2- 160512 C49 2.5+ 2.3+ 160512 C49 0.6+ 2.3- 210107 A71 0.6- 0.1+ 160512 C49 2.5+ 2.4+ 160512 C49 4.8+ 2.8+ 210107 A71 0.2- 0.0 160512 C49 3.8+ 5.5- 160512 C49 3.1- 2.0+ 210108 H06 0.2- 0.6- 160512 C49 1.8+ 4.0- 160512 C49 2.8- 1.0- 210108 H06 0.8+ 0.2- 160512 C49 0.6+ 3.6- 160512 C49 2.8- 2.9- 210108 K88 0.1+ 0.2- 160512 C49 3.4+ 3.6- 160512 C49 1.2+ 2.8- 210108 K88 0.0 0.3- 160512 C49 (1.6- 10.8+) 160512 C49 2.2+ 4.3- 210109 H06 0.1- 0.6- 160512 C49 2.0- 0.2- 160512 C49 (9.0- 1.4+) 210109 H06 0.4- 0.2- 160512 C49 1.1+ 0.7- 160512 C49 2.6+ 1.2+ 210109 H06 0.3+ 0.1- 160512 C49 4.5- 3.2+ 160512 C49 0.1+ 4.2- 210109 Q11 0.3+ 0.1+ 160512 C49 1.0+ 2.4+ 160513 C49 6.8+ 6.7+ 210109 349 0.1- 0.1- 160512 C49 1.2+ 2.7+ 160513 C49 (8.2- 5.9+) 210109 Q11 0.2+ 0.1- 160512 C49 1.6+ 2.7- 160513 C49 1.7+ 2.3- 210109 349 0.4- 0.1- 160512 C49 6.4- 3.1+ 160513 C49 1.3+ 0.7+ 210109 Q11 0.3+ 0.2+ 160512 C49 1.7- 2.4+ 160513 C49 1.5+ 4.7- 210109 349 0.1+ 0.1+ 160512 C49 1.5- 0.3+ 160513 C49 4.3+ 1.4- 210109 349 0.2- 0.6+ 160512 C49 1.8- 0.6+ 160513 C49 0.3- 5.6- 210109 349 0.5- 0.1+ 160512 C49 1.8+ 3.4+ 160513 C49 3.3+ 3.7- 210110 349 0.3- 0.5+ 160512 C49 0.2+ 1.6- 160513 C49 7.4+ 5.4+ 210110 349 0.1- 0.2+ 160512 C49 4.0+ 0.5- 160513 C49 1.5+ 0.2- 210110 349 0.0 0.3+ 160512 C49 (9.4+ 0.9+) 160513 C49 (8.1- 4.9-) 210110 349 0.1- 0.0 160512 C49 (9.6+ 5.0-) 160513 C49 0.7- 5.6- 210110 349 0.5- 0.0 160512 C49 0.2- 1.2+ 160513 C49(19.3+ 8.4+) 210110 A71 0.6+ 0.4+ 160512 C49 7.0- 0.8- 160513 C49 (2.5+ 21.5+) 210110 A71 0.6+ 0.0 160512 C49 0.9- 5.7+ 160513 C49 (5.1+ 14.8+) 210110 A71 0.5+ 0.2+ 160512 C49 0.4+ 0.3+ 160513 C49 (6.8- 13.0+) ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2021 Jan. 11