Nakano Note (Nakano wa Kangaeru noda) NK 4181 A/2019 NJ3
The following improved orbital elements, by S. Nakano, are from 33 observations 2019 June 5 to 2020 Aug. 7. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.44 arc second. Some observers detected the comet nature. Residuals on 2020 July 30 and August 7 were about -3.3 deg for Right Ascension and about -10.9 deg for Declination from an ellipse on MPO 477929 (one day span; q= 3.31 AU, e= 0.40) with the delta-T correction = about +22 days. The comet has passed 3.96 AU from Jupiter on 2020 Mar. 23 UT. Epoch = 2020 Nov. 7.0 TT T = 2020 Oct. 22.28928 +/- 0.01128 (m.e.) TT Peri. = 246.84233 +/- 0.00172 Node = 142.45530 +/- 0.00004 (2000.0) Inc. = 99.43870 +/- 0.00007 q = 4.3616216 +/- 0.0000652 AU e = 1.0007678 +/- 0.0000400 1/a = -0.0001760 +/- 0.0000092 1/AU origin = +0.000028 (Q= 8) future = +0.000000 (Not mistaken) The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2019/ 190706 F51 0.0 0.1- 2020/ 190605 W84 0.0 0.3- 190706 F51 0.1+ 0.2+ 200725 L09 0.0 0.2- 190627 W84 0.4+ 0.1+ 190706 F51 0.0 0.1- 200725 L09 0.2- 0.5+ 190705 G96 0.3+ 0.1+ 190706 F51 0.0 0.2- 200725 L09 0.4+ 0.3- 190705 G96 0.5- 0.1- 190706 474 0.2- 0.1+ 200730 X02 0.2+ 0.1+ 190705 G96 0.1- 0.9+ 190706 474 0.4- 0.1+ 200730 X02 0.2+ 0.0 190705 H01 0.0 0.0 190706 474 0.3- 0.4+ 200801 Q62 0.1- 0.0 190705 H01 0.1+ 0.3- 190706 474 0.1- 0.1+ 200801 Q62 0.1- 0.3+ 190705 I52 0.6- 0.3- 190727 F52 0.2- 0.2- 200807 W95 0.1+ 0.0 190705 H01 0.1+ 0.1- 190727 F52 0.1+ 0.1- 200807 W95 0.0 0.3- 190705 I52 0.0 1.5+ 190727 F52 0.2+ 0.3+ 200807 W95 0.3- 0.1- 190705 H01 0.2- 0.1+ 190808 W84 0.0 0.1-
Associate of the CBAT Syuichi Nakano 2020 Aug. 11