Nakano Note (Nakano wa Kangaeru noda) NK 5576 P/2021 N1 (ZTF)
The following improved orbital elements, by S. Nakano, are from 92 observations 2021 June 17 to July 12. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.56 arc second. Epoch = 2021 May 26.0 TT T = 2021 June 6.55481 +/- 0.00201 (m.e.) TT Peri. = 21.18959 +/- 0.00542 Node = 301.15455 +/- 0.01151 (2000.0) Inc. = 11.50540 +/- 0.00072 q = 0.9621006 +/- 0.0001396 AU e = 0.6767183 +/- 0.0002365 a = 2.9760439 +/- 0.0022192 AU n' = 0.19197517 +/- 0.00021473 P = 5.134 +/- 0.0057425 years (+/- 2.10 days) The predicted orbit for the 2026 return is as follows: T = 2026 July 26.93815 TT Epoch = 2026 July 19.0 TT Peri. = 21.21681 e = 0.6756197 Node = 301.12467 (2000.0) a = 2.9792927 AU Inc. = 11.48596 n'= 0.19166125 q = 0.9664237 AU P = 5.142 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2021/ 210707 N51 0.6- 0.0 210709 J04 0.1+ 0.0 210617 I41 0.2- 0.1- 210707 N51 0.3- 0.3- 210709 J04 1.1- 0.4- 210617 I41 0.8- 0.3+ 210707 N51 0.6- 0.3- 210709 J13 0.4+ 0.3+ 210617 I41 0.2- 0.1- 210707 N51 0.1- 0.4- 210709 J13 0.8+ 0.3+ 210617 I41 0.2+ 0.2+ 210707 N51 0.6- 0.4- 210709 J13 0.9+ 0.6+ 210617 I41 1.3+ 0.3- 210707 N51 0.3- 0.1- 210709 J13 0.7+ 0.3- 210702 I41 0.6- 0.0 210707 N51 0.3- 0.0 210710 L06 1.0- 0.5- 210702 I41 0.4- 0.1+ 210707 N51 0.6- 0.1+ 210710 L06 1.0- 0.6- 210702 I41 0.2- 0.1+ 210707 N51 0.1+ 0.0 210710 L06 0.0 0.5- 210702 I41 0.3- 0.2+ 210707 N51 0.5- 0.6- 210710 L06 0.3- 0.3- 210704 I41 0.8- 0.2- 210707 N51 0.1- 0.7- 210710 G40 0.2- 0.2+ 210704 I41 0.4- 0.2- 210708 033 1.1- 0.3+ 210710 G40 0.6+ 0.1- 210704 I41 0.2- 0.1- 210708 033 0.7- 0.4+ 210710 J13 1.3+ 0.4+ 210705 I41 1.5+ 0.1+ 210708 A77 0.7+ 1.0+ 210710 J13 0.3+ 0.1- 210705 I41 1.7+ 0.1- 210708 A77 0.6+ 1.0+ 210710 J13 0.3+ 0.1+ 210706 Q62 0.4- 0.2- 210708 J13 1.1+ 0.7+ 210710 J13 1.1+ 0.1- 210706 Q62 0.4- 0.3- 210708 J13 0.5- 0.2+ 210710 I41 0.2- 0.3- 210706 Q62 0.2- 0.1+ 210708 J13 (0.9+ 2.4+) 210710 I41 0.7- 0.6- 210707 A71 (2.0- 0.1-) 210708 U83 0.1+ 0.0 210710 I41 0.2- 0.1+ 210707 A71 (2.4- 1.0-) 210708 U83 0.3+ 0.3+ 210710 I41 0.4- 0.3- 210707 L01 1.1- 0.5+ 210708 U83 0.7+ 0.8- 210710 I41 0.1- 0.0 210707 L01 0.7- 0.4+ 210708 U83 1.0+ 0.4+ 210711 J13 1.0+ 0.5+ 210707 L01 0.6+ 0.0 210708 U83 1.0+ 0.4+ 210711 J13 0.1- 0.2+ 210707 L01 0.1+ 0.9+ 210708 U83 0.7+ 0.5- 210711 J13 0.7+ 0.4+ 210707 L01 0.2- 0.5+ 210708 U83 0.2+ 0.4+ 210711 I41 0.9- 0.4- 210707 L01 0.5- 0.1+ 210708 U83 0.6+ 0.2+ 210711 I41 0.3- 0.2- 210707 L81 0.5- 1.3- 210708 U83 0.5+ 0.5- 210711 I41 0.2- 0.2- 210707 L81 0.1+ 0.1- 210708 U83 0.6+ 0.7+ 210711 I41 0.2- 0.1- 210707 G40 0.6+ 0.6- 210708 U83 0.0 0.0 210711 I41 0.0 0.1- 210707 G40 0.4+ 0.5+ 210708 U83 0.8+ 0.4+ 210712 215 1.7- 0.9+ 210707 Y00 0.2+ 0.5+ 210708 U83 0.4- 0.9- 210712 215 (2.4- 0.3+) 210707 Y00 0.3- 0.1+ 210708 U83 0.7+ 0.4+ 210712 215 (4.5- 1.1+) 210707 Y00 0.0 0.8- 210709 J04 1.2- 0.3- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2026 May 19