Nakano Note (Nakano wa Kangaeru noda) NK 4178 C/2020 F5 (MASTER)

The following improved orbital elements, by S. Nakano, are from 147 observations 2020 Mar. 16 to July 26. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.49 arc second. The comet will pass 0.48 AU from Jupiter on 2022 Mar. 5 UT. As result, semi-major axis will be changed from 1993 AU (P= 89000 years; orgin value) to 157 AU (P= 1960 years; future value), but values are still uncertainty. See the previous orbits in CBET 4746 and NK 4150. Epoch = 2021 Mar. 7.0 TT T = 2021 Mar. 24.25994 +/- 0.02013 (m.e.) TT Peri. = 311.07113 +/- 0.00547 Node = 350.62832 +/- 0.00070 (2000.0) Inc. = 51.70676 +/- 0.00007 q = 4.3258852 +/- 0.0001864 AU e = 1.0033317 +/- 0.0000703 1/a = -0.0007702 +/- 0.0000163 1/AU origin = +0.000502 (Q= 7) future = +0.006379 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2020/ 200406 I48 0.0 0.5+ 200513 I39 0.9+ 0.7- 200316 K95 0.0 0.5+ 200407 I48 0.0 0.2+ 200513 I39 0.2+ 0.1- 200316 K95 0.5- 0.6+ 200407 I48 0.1- 0.2- 200513 I39 0.1+ 0.1- 200321 K95 (2.3- 1.6+) 200407 I48 0.4- 0.3+ 200518 W88 0.1+ 0.5+ 200321 K95 (2.2- 1.6+) 200407 I48 0.1+ 0.3+ 200518 W88 0.0 0.0 200322 K95 1.8- 1.5+ 200407 X31 0.2+ 0.6- 200521 323 0.0 0.4+ 200323 K95 1.7- 1.0+ 200407 X31 0.2+ 0.4- 200521 323 0.1+ 0.4+ 200328 W92 0.8- 0.8+ 200407 I39 0.0 0.3+ 200522 E89 0.7+ 0.4+ 200328 W92 1.8- 1.2+ 200407 X31 0.2- 0.2- 200522 E89 0.7+ 0.5+ 200328 W92 (2.0- 1.2+) 200407 I39 0.4+ 0.4+ 200522 E89 0.6+ 0.4+ 200405 W92 0.5+ 0.1- 200407 I39 0.3+ 0.3- 200522 E89 0.2+ 0.3+ 200405 W92 1.3- 0.9+ 200407 W88 0.2+ 0.4- 200524 W88 0.1- 0.6+ 200405 W92 0.8- 0.6+ 200407 W88 0.1+ 0.3- 200524 W88 0.1- 0.3+ 200405 Q62 0.3+ 0.5- 200407 W88 0.1+ 0.1- 200524 W88 0.0 0.0 200405 Q62 0.3+ 0.3- 200407 W88 0.3+ 0.5- 200602 X03 0.1- 0.3- 200405 Q62 0.1+ 0.5- 200407 W88 0.3+ 0.4- 200602 X03 0.1- 0.7+ 200405 Q62 0.4+ 0.4- 200407 W88 0.1- 0.3- 200602 X03 0.0 0.5+ 200405 Q62 0.5+ 0.2- 200407 W88 0.2- 0.1- 200602 X03 0.1+ 0.6+ 200405 Q62 0.3+ 0.4- 200407 W88 0.0 0.1- 200602 X03 0.0 0.5+ 200405 Q62 0.3+ 0.3- 200407 W88 0.3+ 0.1- 200606 Q62 0.4- 0.6- 200405 Q62 0.1+ 0.3- 200407 I48 0.1+ 0.3- 200606 Q62 0.5- 0.6- 200405 Q62 0.1+ 0.2- 200407 I48 0.1+ 0.2+ 200606 Q62 0.2- 0.7- 200405 Q62 0.0 0.0 200407 I48 0.8+ 0.1+ 200708 Q62 0.5- 0.7- 200405 Q62 0.0 0.2- 200408 I48 0.0 0.3+ 200708 Q62 0.2- 0.8- 200405 Q62 0.2+ 0.3- 200408 I48 0.9+ 0.9- 200708 Q62 0.6- 0.5- 200405 Q62 0.1+ 0.2- 200408 X31 0.1+ 0.6- 200716 Q68 0.2+ 0.4+ 200405 I47 0.3+ 0.4+ 200408 X31 0.7+ 0.3+ 200716 Q68 0.1+ 0.2+ 200406 I47 0.1+ 0.4+ 200408 X31 0.3+ 0.3+ 200716 Q68 0.3+ 0.3+ 200406 I47 0.2- 0.3+ 200408 X02 0.2+ 0.8- 200716 Q68 0.0 0.2+ 200406 I47 0.2- 0.3+ 200408 X02 0.3+ 0.8- 200716 Q68 0.1+ 0.1+ 200406 X31 0.2+ 0.5- 200408 X02 0.3+ 0.8- 200716 Q68 0.4+ 0.2+ 200406 I39 0.2+ 0.0 200408 W88 0.1+ 0.0 200716 Q68 0.3- 0.2- 200406 X31 0.2+ 0.6- 200408 W88 0.1+ 0.0 200716 Q68 0.3+ 0.1+ 200406 W88 0.1- 0.3- 200415 X03 0.0 0.6+ 200717 Q68 0.1- 0.1- 200406 X31 0.1- 0.7- 200415 X03 0.2+ 0.1+ 200717 Q68 0.1- 0.0 200406 W88 0.1+ 0.2- 200415 X03 0.0 0.1+ 200717 Q68 0.2- 0.1- 200406 I39 0.3- 0.3+ 200415 X03 0.1+ 0.1+ 200717 Q68 0.6+ 0.4+ 200406 W88 0.0 0.5- 200415 X03 0.1+ 0.1+ 200717 Q68 0.0 0.1- 200406 I39 0.1+ 0.5+ 200415 X03 0.0 0.3+ 200717 Q68 0.4+ 0.2+ 200406 I47 0.1+ 0.1- 200415 X03 0.1+ 0.1+ 200717 Q68 0.0 0.2- 200406 I47 0.0 0.1- 200417 I39 0.8- 0.7+ 200717 Q68 0.1- 0.1- 200406 I47 0.1- 0.3- 200417 I39 1.1- 1.1+ 200718 Q68 (4.0- 1.8+) 200406 Q38 0.1+ 0.8+ 200417 I39 0.2+ 0.5- 200718 Q68 1.1- 1.2+ 200406 Q38 0.1+ 1.5- 200424 Q62 0.1+ 0.1- 200718 Q68 0.6- 0.4- 200406 Q38 1.5+ 0.9- 200424 Q62 0.1- 0.2- 200718 Q68 0.6- 0.8- 200406 Q62 0.0 0.0 200510 I39 1.1- 0.4+ 200725 474 0.4- 0.6- 200406 Q62 0.2- 0.1+ 200510 I39 0.4- 1.5+ 200725 474 0.4- 0.6- 200406 Q62 0.0 0.3- 200512 I39 0.7- 0.5+ 200725 474 0.5- 0.8- 200406 Q62 0.2+ 0.5- 200512 I39 (0.1+ 2.8+) 200726 E94 0.6+ 0.6+ 200406 Q62 0.1+ 0.7- 200512 I39 0.4+ 0.2- 200726 E94 0.8+ 0.7+ 200406 Q62 0.1- 0.3+ 200512 I39 0.0 0.2+ 200726 E94 0.6+ 0.5+ ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2020 Aug. 10

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