Nakano Note (Nakano wa Kangaeru noda) NK 4461 C/2021 A6 (PANSTARRS)

The following improved orbital elements, by S. Nakano, are from 91 observations 2020 Nov. 26 to 2021 Apr. 17. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.39 arc second. See the previous orbits in CBET 4916 and NK 4444. Epoch = 2021 Apr. 16.0 TT T = 2021 May 5.12493 +/- 0.14004 (m.e.) TT Peri. = 351.75480 +/- 0.00879 Node = 164.07938 +/- 0.00033 (2000.0) Inc. = 75.60757 +/- 0.00153 q = 7.9289230 +/- 0.0000940 AU e = 0.9993467 +/- 0.0000747 1/a = +0.0000824 +/- 0.0000094 1/AU origin = +0.000008 (Q= 7) future = +0.000081 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2020/ 210110 568 0.1+ 0.2+ 210218 474 0.1- 0.2- 201126 G96 0.3- 0.4- 210110 568 0.1+ 0.2+ 210218 474 0.1+ 0.4- 201126 G96 0.5- 0.8- 210110 568 0.0 0.2+ 210307 G96 1.4+ 0.3+ 201126 G96 0.5- 0.0 210110 568 0.1+ 0.2+ 210307 G96 0.2- 0.2- 201126 G96 0.5- 0.7- 210110 568 0.1+ 0.3+ 210307 G96 0.0 0.2- 201222 G96 0.0 0.0 210110 Q62 0.3- 0.6+ 210312 474 0.1+ 0.2- 201222 G96 0.1+ 0.3- 210110 Q62 0.0 0.2+ 210312 474 0.1- 0.1- 201222 G96 0.2+ 0.3- 210110 N51 0.2- 0.8- 210312 474 0.0 0.1- 201222 G96 0.4- 0.5- 210110 N51 0.7- 0.2- 210315 X03 0.7+ 1.0- 2021/ 210110 N51 0.8- 0.0 210315 X03 0.1- 0.2- 210108 F51 0.2+ 0.2+ 210112 F65 0.1+ 0.0 210315 X03 0.1- 1.7- 210108 F51 0.0 0.4+ 210112 F65 0.7+ 0.5+ 210315 X03 (2.2+ 3.4-) 210108 F51 0.5+ 0.3+ 210112 F65 1.3+ 0.4+ 210315 F51 0.3- 0.2+ 210108 F51 0.1- 0.7+ 210113 G96 0.3+ 0.1+ 210315 F51 0.1- 0.3+ 210109 L01 1.4+ 0.4- 210113 G96 0.9- 0.4- 210315 F51 0.2- 0.0 210109 L01 1.2+ 0.1- 210113 G96 1.0- 0.6- 210315 F51 0.2- 0.2+ 210109 L01 1.0+ 0.5- 210113 G96 0.7- 0.4- 210403 G96 0.1- 0.3- 210109 807 0.2+ 0.0 210208 G96 0.1- 0.1- 210403 G96 0.1- 0.9- 210109 807 0.0 0.1+ 210208 G96 0.0 0.2+ 210403 G96 0.3- 0.7- 210109 807 0.1- 0.0 210208 G96 0.4- 0.3+ 210403 G96 0.5- 0.5- 210109 711 0.5- 0.1+ 210208 G96 0.2- 0.2+ 210403 F51 0.0 0.1+ 210109 711 0.4- 0.0 210212 F52 0.3- 0.2+ 210403 F51 0.1- 0.0 210109 I52 0.0 0.2+ 210212 F52 0.4- 0.1+ 210403 F51 0.2+ 0.0 210109 711 0.1+ 0.3+ 210212 F52 0.1+ 0.2+ 210403 F51 0.2- 0.2- 210109 711 0.3- 0.0 210212 F52 0.3- 0.3+ 210414 F51 0.1- 0.1+ 210109 I52 0.4+ 0.5+ 210214 215 0.5- 0.5- 210414 F51 0.0 0.1+ 210109 I52 0.6+ 0.7+ 210214 215 0.0 0.6- 210414 F51 0.0 0.2+ 210109 I52 0.5+ 1.0+ 210214 215 1.0+ 0.4- 210417 F51 0.1+ 0.0 210110 691 0.0 0.2+ 210216 F52 0.1- 0.7+ 210417 F51 0.0 0.1- 210110 691 0.4+ 0.3+ 210216 F52 0.0 0.5+ 210417 F51 0.0 0.0 210110 691 0.3- 0.1- 210216 F52 0.2- 0.4+ 210110 568 0.0 0.3+ 210218 474 0.0 0.1- ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2021 May 14

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