Nakano Note (Nakano wa Kangaeru noda) NK 5395 C/2025 D1 (Groeller)

The following improved orbital elements, by S. Nakano, are from 58 observations 2018 June 6 to 2025 Feb. 22. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.47 arc second. See an orbit in CBET 5509 (same orbit). Epoch = 2028 May 29.0 TT T = 2028 May 28.26108 +/- 0.08594 (m.e.) TT Peri. = 186.11262 +/- 0.00279 Node = 312.90416 +/- 0.00009 (2000.0) Inc. = 84.45937 +/- 0.00019 q = 14.1126108 +/- 0.0004440 AU e = 1.0033466 +/- 0.0001052 1/a = -0.0002371 +/- 0.0000075 1/AU origin = +0.000021 (Q= 9) future = -0.000008 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2018/ 241112 G96 0.0 0.4+ 250220 V06 0.1+ 0.1- 180606 V00 0.0 0.0 241112 G96 0.8+ 0.1+ 250220 V06 0.0 0.0 180607 V00 0.0 0.1- 241112 G96 0.5+ 0.4- 250220 V06 0.1+ 0.1- 180609 V00 0.2- 0.0 241112 G96 0.3+ 0.1- 250220 V06 1.0+ 0.5- 180618 V00 0.4+ 0.2- 241210 G96 0.4- 0.6+ 250220 587 0.0 0.2- 2019/ 241210 G96 0.1+ 0.0 250220 587 0.2+ 0.1- 190209 V00 0.3- 0.1- 241210 G96 0.5+ 0.7+ 250220 587 0.3+ 0.1+ 190212 V00 0.2- 0.3+ 241210 G96 0.9+ 0.4+ 250221 691 0.3- 0.7- 2022/ 2025/ 250221 I52 1.0- 0.7+ 220202 T14 0.3+ 0.4+ 250120 G96 0.0 0.5+ 250221 691 0.5+ 0.0 220530 T09 0.2- 0.2+ 250120 G96 0.7- 0.7+ 250221 I52 0.5- 0.2+ 220530 T09 0.1- 0.6+ 250120 G96 1.1- 0.2+ 250221 I52 0.5- 0.4- 2024/ 250120 G96 0.9- 0.6+ 250221 I52 0.5- 0.6+ 240414 G96 1.1- 0.8- 250208 G96 0.7- 0.4+ 250221 K77 0.3- 0.5- 240414 G96 0.3- 0.8- 250208 G96 0.2- 0.4+ 250221 K77 0.8- 0.4- 240414 G96 0.7+ 0.8- 250208 G96 0.6- 0.0 250221 G00 0.4+ 0.7+ 240414 G96 0.6+ 0.3+ 250208 G96 0.4+ 0.6+ 250221 G00 0.5- 0.1- 240619 G96 0.2- 0.4+ 250220 V00 0.6+ 0.0 250221 G00 0.6+ 0.0 240619 G96 0.5+ 1.1- 250220 V00 0.3+ 0.0 250222 W62 0.0 0.1+ 240619 G96 1.1+ 0.2- 250220 V00 0.1+ 0.1+ 250222 W62 0.2+ 0.3- 240619 G96 0.1- 0.5- 250220 V00 0.2+ 0.1+ 250222 W62 0.0 0.3- ( ) -------- Rejected Obs.

Associate of the CBAT Late edition Syuichi Nakano 2025 Feb. 24

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