Nakano Note (Nakano wa Kangaeru noda) NK 4468 P/2021 K1 (ATLAS)
The following improved orbital elements, by S. Nakano, are from 75 observations 2020 Apr. 20 to 2021 May 27. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.24 arc second. The comet has passed 2.04 AU from Uranus on 1965 March and 2.55 AU from Jupiter on 2021 Mar. 22 UT. See an orbit in CBET 4968. Epoch = 2021 Apr. 16.0 TT T = 2021 May 4.66512 +/- 0.00100 (m.e.) TT Peri. = 184.33247 +/- 0.00031 Node = 140.90560 +/- 0.00007 (2000.0) Inc. = 16.27563 +/- 0.00002 q = 2.4979658 +/- 0.0000049 AU e = 0.8043528 +/- 0.0000067 a = 12.7677086 +/- 0.0004381 AU n' = 0.02160402 +/- 0.00000112 P = 45.621 +/- 0.0023467 years (+/- 0.86 day) The predicted orbit for the 2065 return is as follows: T = 2065 Aug. 18.56502 TT Epoch = 2065 Aug. 23.0 TT Peri. = 184.07241 e = 0.8021747 Node = 140.73612 (2000.0) a = 12.5771652 AU Inc. = 16.27506 n'= 0.02209683 q = 2.4880809 AU P = 44.604 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2020/ 200710 F51 0.1+ 0.0 210522 F51 0.1+ 0.0 200420 F51 0.3- 0.4+ 200710 F51 0.0 0.1- 210522 F51 0.1+ 0.0 200420 F51 0.3- 0.1+ 200713 F51 0.1+ 0.0 210524 T05 0.6- 0.0 200420 F51 0.0 0.1+ 200713 F51 0.2+ 0.0 210524 T05 0.9- 0.1+ 200420 F51 0.1+ 0.1- 200713 F51 0.3+ 0.0 210524 T05 0.7- 0.0 200423 F51 0.1- 0.3+ 200713 F51 0.1+ 0.0 210526 Y00 0.5- 0.1- 200502 F52 0.1+ 0.1+ 200717 F51 0.2- 0.1+ 210526 Y00 0.0 0.0 200517 F51 0.3+ 0.1- 200717 F51 0.0 0.2+ 210526 Y00 0.0 0.0 200517 F51 0.4- 0.1+ 200720 F51 0.2- 0.0 210526 Y00 0.1- 0.1- 200525 F52 0.0 0.1+ 200720 F51 0.2- 0.0 210526 W88 0.4+ 0.2- 200525 F52 0.2+ 0.1+ 200720 F51 0.2- 0.1+ 210526 Y00 0.1- 0.4+ 200525 F52 0.2+ 0.3+ 200812 F52 0.4- 0.3- 210526 W88 0.7- 0.0 200615 F52 0.0 0.3- 200812 F52 0.1- 0.4+ 210526 W88 0.1+ 0.1+ 200615 F52 0.1- 0.0 200812 F52 0.0 0.3- 210526 W79 0.3+ 0.1+ 200615 F52 0.1- 0.1- 200812 F52 0.0 0.6- 210526 W88 0.3+ 0.0 200615 F52 0.5- 0.0 2021/ 210526 W79 0.2+ 0.1+ 200617 F51 0.0 0.0 210514 T08 0.8- 0.1+ 210526 W79 0.3+ 0.0 200617 F51 0.2+ 0.2- 210514 T08 1.0- 0.2+ 210527 X02 0.2- 0.0 200617 F51 0.2+ 0.0 210514 T08 0.6- 0.2+ 210527 X02 0.1- 0.0 200617 F51 0.1+ 0.1+ 210514 T08 0.5- 0.1- 210527 W88 0.1+ 0.1- 200622 F52 0.2+ 0.3+ 210522 F51 0.1- 0.0 210527 X02 0.1- 0.1- 200622 F52 0.1+ 0.3- 210522 F51 0.1+ 0.1+ 210527 W88 0.1+ 0.2+ 200622 F52 0.3+ 0.3- 210522 F51 0.1+ 0.1+ 210527 W88 0.0 0.1+ 200622 F52 0.1+ 0.1- 210522 F51 0.0 0.1+ 210527 W88 0.5- 0.5+ 200710 F51 0.0 0.0 210522 F51 0.0 0.1- 210527 W88 0.2+ 0.2- 200710 F51 0.1+ 0.0 210522 F51 0.1+ 0.0 ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2021 May 27