Nakano Note (Nakano wa Kangaeru noda) NK 4520 C/2021 Q4 (Fuls)
The following improved orbital elements, by S. Nakano, are from 78 observations 2020 Apr. 27 to 2021 Aug. 30. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.41 arc second. The comet will pass 2.45 AU from Saturn on 2025 Apr. 30 UT. See an orbit in CBET 5028 (same orbit). Epoch = 2023 June 25.0 TT T = 2023 June 10.66635 +/- 0.01147 (m.e.) TT Peri. = 147.01173 +/- 0.00220 Node = 183.33225 +/- 0.00017 (2000.0) Inc. = 71.47505 +/- 0.00002 q = 7.5647821 +/- 0.0001812 AU e = 1.0030503 +/- 0.0000472 1/a = -0.0004032 +/- 0.0000062 1/AU origin = +0.000133 (Q= 8) future = +0.000288 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2020/ 210725 F51 0.4+ 0.2- 210828 C10 (2.4- 3.2-) 200427 F52 0.3+ 0.2+ 210826 G96 0.3- 0.1- 210828 F65 0.1+ 0.0 200519 F51 0.0 0.1- 210826 G96 0.2- 0.2+ 210828 F65 0.0 0.2- 200520 F52 0.4+ 0.0 210826 G96 0.5- 0.2- 210828 587 0.6- 0.1- 200521 F51 0.1- 0.0 210826 G96 0.4- 0.0 210828 587 0.3+ 0.1+ 200530 F52 0.3- 0.2- 210826 G96 1.4- 0.1+ 210829 L27 0.2- 0.1- 200614 F51 0.2+ 0.2+ 210826 G96 0.1- 0.4- 210829 L27 1.1- 0.1- 200614 F51 0.1- 0.2- 210826 G96 0.0 0.2- 210829 L27 1.5- 0.9+ 200629 F51 0.1- 0.2- 210827 G96 0.0 0.1+ 210829 H06 0.7- 0.1- 200629 F51 0.1+ 0.0 210827 G96 0.2- 0.3- 210829 H06 0.3- 0.0 200629 F51 0.1+ 0.1- 210827 C82 (0.6+ 3.9+) 210829 H06 0.3- 0.1- 200629 F51 0.3- 0.3- 210827 C82 1.5- 0.6- 210829 F52 0.5+ 0.2+ 200701 F51 0.1- 0.0 210827 J57 0.2- 0.2+ 210829 F52 0.4+ 0.2- 200801 F51 0.2+ 0.2- 210827 J57 1.0- 0.6+ 210829 F52 0.0 0.1- 200818 F52 0.1- 0.1+ 210827 L01 0.8- 0.3- 210829 F52 0.0 0.1- 200818 F52 0.5- 0.1+ 210827 J57 0.3- 0.1+ 210829 157 0.5- 0.2- 200818 F52 0.0 0.1+ 210827 L01 0.1- 0.9+ 210829 157 0.1+ 0.3+ 200818 F52 0.3- 0.2+ 210827 C10 0.0 0.2+ 210829 Z08 0.5- 0.2+ 200923 F51 0.3+ 0.1+ 210827 L01 0.3- 0.8+ 210829 Z08 0.1+ 0.1- 200923 F51 0.1- 0.1+ 210827 C10 0.2- 0.4- 210830 C82 0.6- 0.4+ 200923 F51 0.0 0.2+ 210827 Z41 0.1+ 0.0 210830 C82 0.6- 0.9+ 201026 F51 0.1+ 0.0 210827 Z41 0.3- 1.1+ 210830 L27 0.3- 0.2+ 2021/ 210827 C10 0.3- 0.0 210830 L27 0.3- 0.1+ 210617 G96 1.0- 0.1+ 210827 C10 0.1- 0.2- 210830 L74 0.2+ 0.7+ 210617 G96 0.2- 0.6- 210828 C10 0.0 0.4- 210830 L74 0.1- 0.0 210617 G96 0.3+ 0.1+ 210828 Z41 0.3+ 0.2- 210830 L27 0.8+ 1.4+ 210725 F51 0.0 0.2- 210828 C10 0.8+ 0.1- 210725 F51 0.2+ 0.0 210828 C10 0.1+ 0.2+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2021 Sept. 1