Nakano Note (Nakano wa Kangaeru noda) NK 5468 C/2025 D1 (Groeller)
The following improved orbital elements, by S. Nakano, are from 64 observations 2018 June 6 to 2025 May 2. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.49 arc second. See an orbit in CBET 5509 (= NK 5395). Epoch = 2028 May 29.0 TT T = 2028 May 28.16497 +/- 0.11655 (m.e.) TT Peri. = 186.11014 +/- 0.00355 Node = 312.90414 +/- 0.00014 (2000.0) Inc. = 84.45931 +/- 0.00027 q = 14.1130049 +/- 0.0005638 AU e = 1.0034892 +/- 0.0001709 1/a = -0.0002472 +/- 0.0000121 1/AU origin = +0.000011 (Q= 9) future = -0.000018 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2018/ 250221 691 0.2- 0.6- 250318 658 0.2- 0.3+ 180606 V00 0.0 0.0 250221 I52 1.0- 0.8+ 250318 658 0.0 0.4- 180607 V00 0.1- 0.2- 250221 691 0.6+ 0.0 250318 658 0.0 0.3- 180609 V00 0.2- 0.0 250221 I52 0.5- 0.3+ 250318 658 0.2+ 0.3- 180618 V00 0.4+ 0.3- 250221 I52 0.4- 0.4- 250318 B50 0.6+ 1.4- 2019/ 250221 I52 0.4- 0.7+ 250318 B50 (3.8- 1.1-) 190209 V00 0.0 0.1- 250221 K77 0.2- 0.4- 250323 Z10 0.1- 0.4- 190212 V00 0.1+ 0.3+ 250221 K77 0.8- 0.3- 250323 Z10 0.2- 0.5- 2022/ 250221 G00 0.5+ 0.8+ 250327 A77 0.3+ 0.6+ 220202 T14 0.4+ 0.1+ 250221 G00 0.4- 0.0 250327 A77 1.0+ 1.2- 220530 T09 0.3- 0.2- 250221 G00 0.6+ 0.1+ 250327 A77 1.4- 0.1+ 220530 T09 0.3- 0.2+ 250222 W62 0.1+ 0.2+ 250327 B50 (3.9+ 0.8-) 2025/ 250222 W62 0.2+ 0.2- 250327 B50 1.2- 0.1+ 250220 V00 0.7+ 0.0 250222 W62 0.1+ 0.2- 250401 B96 1.6+ 0.3+ 250220 V00 0.4+ 0.1+ 250223 Y71 0.3+ 0.2- 250401 B96 1.1+ 1.3+ 250220 V00 0.2+ 0.2+ 250223 K77 0.9- 0.6- 250419 U94 0.2- 0.1+ 250220 V00 0.3+ 0.1+ 250223 Y71 0.2+ 0.7+ 250419 U94 0.1+ 0.1+ 250220 V06 0.2+ 0.1- 250223 K77 (2.7- 0.3-) 250421 A77 0.8- 0.5- 250220 V06 0.0 0.1+ 250223 Y71 0.6- 0.1+ 250421 A77 (2.1- 1.8-) 250220 V06 0.1+ 0.1- 250226 Q11 0.3- 0.0 250430 215 0.2+ 0.0 250220 V06 1.0+ 0.4- 250226 Q11 0.5- 0.1+ 250430 215 0.1+ 0.1+ 250220 587 0.1+ 0.2- 250312 213 0.9- 0.2+ 250430 215 0.2+ 0.1+ 250220 587 0.3+ 0.0 250312 213 1.1- 0.1- 250502 Q11 0.1+ 0.4+ 250220 587 0.4+ 0.1+ 250318 658 0.6- 0.5+ 250502 Q11 0.0 0.1+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2025 Oct. 11