Nakano Note (Nakano wa Kangaeru noda) NK 4444 C/2021 A6 (PANSTARRS)

The following improved orbital elements, by S. Nakano, are from 77 observations 2020 Nov. 26 to 2021 Mar. 15. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.45 arc second. See an orbit in CBET 4916. Epoch = 2021 Apr. 16.0 TT T = 2021 May 4.11912 +/- 0.39588 (m.e.) TT Peri. = 351.69164 +/- 0.02489 Node = 164.08048 +/- 0.00068 (2000.0) Inc. = 75.60239 +/- 0.00309 q = 7.9289914 +/- 0.0001221 AU e = 0.9990637 +/- 0.0001502 1/a = +0.0001181 +/- 0.0000189 1/AU origin = +0.000044 (Q= 7) future = +0.000117 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2020/ 210109 I52 0.5+ 1.0+ 210212 F52 0.2- 0.1- 201126 G96 0.1- 0.3- 210110 691 0.1- 0.2+ 210212 F52 0.3+ 0.1- 201126 G96 0.3- 0.8- 210110 691 0.4+ 0.3+ 210212 F52 0.2- 0.0 201126 G96 0.3- 0.1+ 210110 691 0.4- 0.1- 210214 215 0.4- 0.7- 201126 G96 0.4- 0.6- 210110 568 0.0 0.3+ 210214 215 0.1+ 0.8- 201222 G96 0.1- 0.1+ 210110 568 0.0 0.2+ 210214 215 1.1+ 0.6- 201222 G96 0.0 0.2- 210110 568 0.1+ 0.2+ 210216 F52 0.1+ 0.4+ 201222 G96 0.1+ 0.3- 210110 568 0.0 0.2+ 210216 F52 0.2+ 0.2+ 201222 G96 0.5- 0.4- 210110 568 0.0 0.2+ 210216 F52 0.0 0.1+ 2021/ 210110 568 0.1+ 0.2+ 210218 474 0.1+ 0.3- 210108 F51 0.1+ 0.2+ 210110 Q62 0.3- 0.5+ 210218 474 0.0 0.4- 210108 F51 0.0 0.4+ 210110 Q62 0.1- 0.2+ 210218 474 0.2+ 0.6- 210108 F51 0.4+ 0.2+ 210110 N51 0.3- 0.8- 210307 G96 1.5+ 0.2+ 210108 F51 0.2- 0.6+ 210110 N51 0.8- 0.2- 210307 G96 0.1- 0.4- 210109 L01 1.3+ 0.5- 210110 N51 0.8- 0.0 210307 G96 0.1+ 0.3- 210109 L01 1.2+ 0.1- 210112 F65 0.0 0.0 210312 474 0.1+ 0.3- 210109 L01 0.9+ 0.5- 210112 F65 0.7+ 0.4+ 210312 474 0.1- 0.2- 210109 807 0.1+ 0.0 210112 F65 1.3+ 0.4+ 210312 474 0.0 0.3- 210109 807 0.0 0.0 210113 G96 0.2+ 0.0 210315 X03 0.7+ 1.1- 210109 807 0.2- 0.1- 210113 G96 0.9- 0.5- 210315 X03 0.1- 0.3- 210109 711 0.6- 0.0 210113 G96 1.1- 0.6- 210315 X03 0.1- 1.8- 210109 711 0.5- 0.0 210113 G96 0.8- 0.4- 210315 X03 (2.2+ 3.5-) 210109 I52 0.1- 0.2+ 210208 G96 0.0 0.3- 210315 F51 0.2- 0.1+ 210109 711 0.1+ 0.3+ 210208 G96 0.1+ 0.0 210315 F51 0.0 0.2+ 210109 711 0.4- 0.0 210208 G96 0.3- 0.1+ 210315 F51 0.0 0.1- 210109 I52 0.4+ 0.5+ 210208 G96 0.1- 0.0 210315 F51 0.2- 0.1+ 210109 I52 0.6+ 0.6+ 210212 F52 0.0 0.1- ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2021 Apr. 4

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