Nakano Note (Nakano wa Kangaeru noda) NK 4869 C/2021 K2 (MASTER)

The following improved orbital elements, by S. Nakano, are from 81 observations 2021 May 10 to 2022 July 8. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.51 arc second. The comet has passed 3.65 AU from Jupiter on 2021 May 8 UT. There is a possibility all observations on 2022 July 8 are bad. See an orbit in CBET 4975. Epoch = 2021 Sept.23.0 TT T = 2021 Sept. 9.08123 +/- 0.00684 (m.e.) TT Peri. = 343.31436 +/- 0.00072 Node = 282.24492 +/- 0.00005 (2000.0) Inc. = 100.84610 +/- 0.00012 q = 5.4670250 +/- 0.0000142 AU e = 1.0011884 +/- 0.0000217 1/a = -0.0002174 +/- 0.0000040 1/AU origin = +0.000219 (Q= 8) future = +0.000214 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2021/ 210602 194 0.3- 0.2- 210709 Y00 0.8+ 0.4+ 210510 K95 0.4- 0.6+ 210602 194 0.1+ 0.3+ 210709 Y00 0.9+ 0.2- 210510 K95 0.1+ 0.7+ 210602 194 0.5- 0.8- 210709 Y00 0.6+ 0.1+ 210510 K95 1.6- 0.5+ 210603 L81 0.2- 0.1+ 210717 X03 0.1- 0.4- 210510 K95 1.1- 0.5+ 210603 L81 0.1+ 0.1+ 210717 X03 0.0 0.4- 210518 K95 0.4- 0.2+ 210604 G39 0.5+ 0.2- 210717 X03 0.3- 0.2- 210518 K95 0.1+ 0.2+ 210604 G39 0.1- 0.7+ 210717 X03 0.0 0.1- 210518 K95 0.6- 0.1+ 210604 E94 0.0 0.3+ 210717 X03 0.7- 0.1+ 210518 K95 0.1- 0.1+ 210604 E94 0.2+ 0.2+ 210807 T05 0.1+ 0.1- 210518 K95 0.8+ 0.2- 210604 E94 0.2- 0.4- 210807 T05 0.0 0.3+ 210519 K95 0.9+ 1.7+ 210604 E94 0.1- 0.5- 210807 T05 0.4+ 0.1+ 210522 K95 0.1- 1.5- 210604 L81 0.1+ 0.0 210807 T05 0.3- 0.5- 210523 K95 0.6- 1.1+ 210604 L81 0.0 0.2- 210807 T05 0.7+ 0.1- 210523 K95 0.3- 0.6- 210605 Q62 0.3+ 0.1+ 210807 T05 0.5- 0.3- 210601 W94 1.2+ 0.5+ 210605 Q62 0.2- 0.1+ 210819 E94 0.2+ 0.5+ 210601 W94 0.4+ 1.1+ 210606 L81 0.4- 0.4- 210819 E94 0.3- 0.0 210601 W94 0.7- 0.5- 210606 L81 0.5+ 0.5- 210819 E94 0.5+ 0.0 210601 W95 0.2+ 0.1+ 210607 L81 0.6+ 0.2+ 210819 E94 0.0 0.0 210601 W95 0.6- 0.0 210607 L81 0.3+ 0.2+ 210826 E94 0.0 0.2+ 210601 W95 0.8- 0.1+ 210607 L81 0.2+ 0.2+ 210826 E94 0.5- 0.9+ 210601 W95 0.2+ 0.1- 210608 W88 0.5+ 0.8- 210826 E94 0.1- 0.3- 210601 W95 0.6+ 0.5- 210608 W88 0.4+ 0.0 2022/ 210601 W95 0.8+ 0.6- 210608 W88 0.3- 0.1- 220402 568 0.3- 1.2+ 210602 Y00 0.4- 0.4+ 210608 W88 0.1+ 0.0 220402 568 0.2- 1.0+ 210602 Y00 0.0 0.3- 210609 L81 0.1- 0.1- 220708 A77 (9.5- 1.6+) 210602 Y00 0.0 0.2+ 210609 L81 0.1- 0.2- 220708 A77 (8.1- 3.3-) 210602 X02 0.1- 0.1- 210706 Y00 0.4+ 1.3- 220708 A77 0.1+ 1.1- 210602 X02 0.1- 0.1- 210706 Y00 0.1+ 0.9- 210602 X02 0.1- 0.2- 210706 Y00 1.1- 0.4- ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2022 Dec. 11

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