Nakano Note (Nakano wa Kangaeru noda) NK 4685 C/2021 Q4 (Fuls)
The following improved orbital elements, by S. Nakano, are from 109 observations 2020 Apr. 27 to 2022 Apr. 2. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.42 arc second. Accuracy of orbit depends upon one night observations on 2022 April 2. The comet will pass 2.45 AU from Saturn on 2025 Apr. 30 UT. See the previous orbits in NK 4520 (= CBET 5028). Epoch = 2023 June 25.0 TT T = 2023 June 10.68479 +/- 0.00494 (m.e.) TT Peri. = 147.01536 +/- 0.00033 Node = 183.33200 +/- 0.00008 (2000.0) Inc. = 71.47509 +/- 0.00003 q = 7.5644970 +/- 0.0000246 AU e = 1.0031464 +/- 0.0000308 1/a = -0.0004159 +/- 0.0000041 1/AU origin = +0.000121 (Q= 8) future = +0.000275 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2020/ 210827 C82 1.3- 0.6- 210830 C82 0.5- 0.4+ 200427 F52 0.4+ 0.1+ 210827 J57 0.0 0.2+ 210830 C82 0.5- 0.9+ 200519 F51 0.1+ 0.2- 210827 J57 0.8- 0.6+ 210830 L27 0.1- 0.2+ 200520 F52 0.4+ 0.0 210827 L01 0.7- 0.4- 210830 L27 0.1- 0.1+ 200521 F51 0.0 0.0 210827 J57 0.1- 0.1+ 210830 L74 0.3+ 0.7+ 200530 F52 0.3- 0.1- 210827 L01 0.1+ 0.9+ 210830 L74 0.0 0.1- 200614 F51 0.2+ 0.2+ 210827 C10 0.1+ 0.1+ 210830 L27 1.0+ 1.4+ 200614 F51 0.1- 0.1- 210827 L01 0.1- 0.8+ 210831 A77 1.3+ 0.4+ 200629 F51 0.1- 0.1- 210827 C10 0.0 0.4- 210831 A77 0.1+ 0.2+ 200629 F51 0.0 0.1+ 210827 Z41 0.3+ 0.1- 210831 G40 0.3+ 0.3- 200629 F51 0.1+ 0.1- 210827 Z41 0.1- 1.1+ 210831 G40 1.0- 0.4+ 200629 F51 0.3- 0.2- 210827 C10 0.2- 0.0 210901 215 (0.3- 2.9+) 200701 F51 0.1- 0.0 210827 C10 0.0 0.2- 210901 215 (0.1- 3.5+) 200801 F51 0.1+ 0.2- 210828 C10 0.2+ 0.5- 210901 215 (0.2+ 4.7+) 200818 F52 0.1- 0.0 210828 Z41 0.5+ 0.2- 210901 K77 0.6+ 0.1- 200818 F52 0.5- 0.0 210828 C10 1.0+ 0.1- 210901 K77 1.0+ 1.7- 200818 F52 0.0 0.0 210828 C10 0.3+ 0.2+ 210901 K77 0.9+ 1.2- 200818 F52 0.3- 0.1+ 210828 C10 (2.3- 3.2-) 210902 A71 0.4+ 0.1- 200923 F51 0.3+ 0.1- 210828 F65 0.3+ 0.0 210902 A71 0.2+ 0.7- 200923 F51 0.1- 0.0 210828 F65 0.1+ 0.2- 210902 A71 0.7+ 0.2- 200923 F51 0.1+ 0.0 210828 587 0.4- 0.1- 210904 K77 0.1+ 0.1+ 201026 F51 0.3+ 0.2- 210828 587 0.5+ 0.1+ 210904 K77 0.7+ 0.3+ 2021/ 210828 204 0.0 0.0 210908 A77 0.3+ 0.2+ 210617 G96 0.8- 0.0 210828 204 0.5- 0.1- 210908 A77 1.2- 0.0 210617 G96 0.0 0.7- 210829 204 0.3- 0.0 210913 F52 0.2+ 0.1- 210617 G96 0.5+ 0.0 210829 L27 0.0 0.1- 210913 F52 0.2+ 0.4- 210725 F51 0.2+ 0.4- 210829 L27 0.9- 0.1- 210913 F52 0.2+ 0.1- 210725 F51 0.4+ 0.1- 210829 L27 1.3- 0.9+ 210913 F52 0.3+ 0.0 210725 F51 0.5+ 0.3- 210829 H06 0.5- 0.1- 210924 C10 0.2- 0.6+ 210826 G96 0.1- 0.2- 210829 H06 0.1- 0.1- 210924 C10 0.2+ 0.1+ 210826 G96 0.0 0.1+ 210829 H06 0.1- 0.1- 210924 C10 0.7+ 0.4+ 210826 G96 0.4- 0.2- 210829 F52 0.6+ 0.1+ 210925 W62 0.6- 0.8+ 210826 G96 0.2- 0.0 210829 F52 0.5+ 0.2- 210925 W62 0.9- 0.3- 210826 G96 1.2- 0.0 210829 F52 0.2+ 0.1- 210925 W62 0.5- 1.1+ 210826 G96 0.0 0.4- 210829 F52 0.1+ 0.2- 211025 L27 0.3- 0.0 210826 G96 0.2+ 0.3- 210829 157 0.4- 0.2- 211025 L27 0.3- 0.5+ 210827 G96 0.1+ 0.1+ 210829 157 0.2+ 0.2+ 2022/ 210827 G96 0.0 0.3- 210829 Z08 0.3- 0.1+ 220402 568 0.0 0.0 210827 C82 (0.8+ 3.9+) 210829 Z08 0.2+ 0.1- 220402 568 0.0 0.1- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2022 Apr. 22