Nakano Note (Nakano wa Kangaeru noda) NK 4375 C/2020 H6 (ATLAS)

The following improved orbital elements, by S. Nakano, are from 120 observations 2020 Apr. 22 to 2021 Jan. 20. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.37 arc second. See an orbit in CBET 4768. Epoch = 2021 Sept.23.0 TT T = 2021 Oct. 1.07687 +/- 0.00455 (m.e.) TT Peri. = 20.34860 +/- 0.00091 Node = 213.70642 +/- 0.00007 (2000.0) Inc. = 79.96733 +/- 0.00010 q = 4.7028559 +/- 0.0000415 AU e = 1.0007475 +/- 0.0000164 1/a = -0.0001589 +/- 0.0000035 1/AU origin = +0.000002 (Q= 8) future = +0.000466 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2020/ 200430 X74 0.4+ 0.8+ 200611 T08 0.5- 0.1- 200422 T05 0.1+ 0.2+ 200430 X74 0.3+ 0.0 200611 Q62 0.1- 0.3- 200422 T05 0.6- 0.2+ 200430 X74 0.1- 0.1- 200611 Q62 0.4- 0.3- 200422 T05 0.7- 0.1- 200430 X74 0.6- 0.0 200614 X74 0.5- 0.0 200422 T05 0.2- 0.0 200430 E23 0.3+ 0.5+ 200614 X74 0.2+ 0.2+ 200424 E94 0.5+ 0.2+ 200430 E23 0.7- 0.6- 200614 X74 0.3- 0.4- 200424 E94 0.2+ 0.2+ 200430 E23 0.3+ 0.9+ 200615 T08 0.4+ 0.7+ 200424 E94 0.0 0.1+ 200502 E23 0.7- 0.3+ 200615 T08 0.1+ 0.1+ 200424 E94 0.2- 0.1+ 200502 E23 0.3- 0.4+ 200615 T08 0.1- 0.0 200424 Q62 0.2+ 0.0 200502 E23 0.0 0.1- 200615 T08 0.0 0.2- 200424 Q62 0.4- 0.5- 200502 X31 0.5+ 0.3+ 200615 Q68 0.1+ 0.1+ 200425 X31 0.3+ 0.1- 200502 X31 0.4+ 0.2+ 200615 Q68 0.0 0.0 200425 X31 0.7+ 0.7+ 200502 X31 0.3+ 0.1+ 200615 Q68 0.1+ 0.6+ 200425 X31 0.0 0.4- 200511 Q62 0.2- 0.3- 200615 Q68 0.3- 0.9- 200425 R57 0.3+ 0.2- 200511 Q62 0.2- 0.2- 200616 Q68 0.4- 0.1+ 200425 R57 0.4+ 0.1+ 200512 T05 0.3+ 0.3+ 200616 Q68 0.7+ 0.4+ 200425 R57 0.1- 0.0 200512 T05 0.3- 0.3+ 200624 Q68 0.0 0.2- 200425 R57 0.4- 0.1- 200512 T05 0.6- 0.6- 200624 Q68 0.2+ 0.3- 200426 323 0.1- 0.6+ 200512 T05 0.1- 1.2- 200627 T08 0.3+ 0.8+ 200426 323 0.6- 0.1+ 200512 T05 0.1- 0.3+ 200627 T08 0.7+ 0.3- 200427 323 0.7- 1.0- 200512 T05 0.7- 0.0 200627 T08 0.1- 0.0 200427 323 0.5- 0.1- 200512 T05 0.7+ 0.7- 200627 T08 0.1- 0.5- 200428 474 0.2+ 0.2- 200519 474 0.1+ 0.1+ 201228 T08 0.0 0.1- 200428 474 0.1+ 0.0 200519 474 0.0 0.0 201228 T08 0.1- 0.3+ 200428 474 0.3+ 0.0 200519 474 0.2+ 0.0 201228 T08 0.6- 0.3- 200428 Q62 0.5+ 0.1+ 200519 474 0.2+ 0.0 201228 T08 0.1- 0.1+ 200428 Q62 0.4- 0.1- 200520 323 0.2+ 0.0 2021/ 200428 323 0.3- 0.0 200520 323 0.2+ 0.2+ 210103 T05 0.4- 0.4- 200428 323 0.9+ 1.0- 200530 T08 0.0 0.3- 210103 T05 0.1+ 0.1+ 200429 X31 0.2+ 0.2- 200530 T08 0.2- 0.0 210103 T05 0.4- 0.0 200429 X31 0.1+ 0.4+ 200530 T08 0.3- 0.0 210103 T05 0.1+ 1.0+ 200429 W88 0.5+ 0.1- 200530 T08 0.3+ 0.3- 210105 T08 0.4+ 0.4+ 200429 X31 0.3+ 0.3- 200530 T08 0.1+ 0.1- 210105 T08 0.2+ 0.1- 200429 W88 0.7- 0.1+ 200530 T08 0.5+ 0.1+ 210105 T08 0.0 0.3- 200429 W88 0.3- 0.5+ 200530 T08 0.3+ 0.3- 210105 T08 0.1- 0.1+ 200429 323 0.0 0.2+ 200603 T08 0.2- 0.1+ 210108 A77 0.4+ 0.1+ 200429 323 0.1- 0.2- 200603 T08 0.3- 0.7+ 210108 A77 0.6+ 0.0 200430 W88 0.4+ 0.2+ 200603 T08 0.2- 0.1+ 210108 A77 0.4+ 0.2+ 200430 W88 0.1+ 0.3- 200603 T08 0.3+ 0.4- 210120 Q62 0.3- 0.5- 200430 X74 0.3+ 0.1- 200611 T08 0.0 0.2+ 210120 Q62 0.3- 0.4- 200430 X74 0.1+ 0.0 200611 T08 0.5- 0.9+ ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2021 Jan. 28

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