Nakano Note (Nakano wa Kangaeru noda) NK 4491 C/2021 E3 (ZTF)
The following improved orbital elements, by S. Nakano, are from 106 observations 2021 Mar. 9 to June 13. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.40 arc second. The comet will pass 3.60 AU from Jupiter on 2021 Oct. 8 UT. See an orbit in CBET 4960. Epoch = 2022 June 30.0 TT T = 2022 June 11.91203 +/- 0.04829 (m.e.) TT Peri. = 228.85086 +/- 0.00458 Node = 104.46818 +/- 0.00156 (2000.0) Inc. = 112.55474 +/- 0.00093 q = 1.7774045 +/- 0.0000914 AU e = 1.0008204 +/- 0.0001575 1/a = -0.0004616 +/- 0.0000886 1/AU origin = +0.000053 (Q= 6) future = +0.000622 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2021/ 210319 Z08 0.2- 1.1- 210420 858 0.0 0.4+ 210309 I41 0.1- 0.2- 210320 204 0.4- 0.4+ 210421 118 1.1- 0.2+ 210309 I41 0.3- 0.0 210320 204 0.1- 0.7+ 210421 118 0.1- 0.4+ 210309 I41 0.4- 0.1+ 210326 204 0.4- 0.1+ 210423 Z99 0.4- 0.1- 210309 I41 0.1- 0.1+ 210326 204 0.2- 0.4+ 210423 Z99 0.4- 0.0 210310 L01 0.2+ 0.8+ 210330 L06 0.7+ 0.6- 210423 Z99 0.2- 0.3+ 210310 L01 0.8- 0.1+ 210330 L06 0.4+ 0.8- 210423 K74 0.1- 0.3+ 210310 291 0.2+ 0.7+ 210330 L06 0.4+ 0.6- 210423 K74 0.1- 0.7+ 210310 291 0.1- 0.2+ 210331 204 0.4- 0.4+ 210423 K74 0.1+ 0.4+ 210310 291 0.1- 0.5+ 210331 204 0.3- 0.0 210424 595 0.3- 0.3- 210310 291 0.5- 0.5+ 210401 J13 0.3- 0.4+ 210424 595 0.7- 0.3+ 210311 Z33 0.1+ 0.0 210401 J13 0.2+ 0.4+ 210424 595 0.1- 0.2+ 210311 Z33 0.1- 0.4- 210401 J13 0.1+ 0.5+ 210424 C10 (2.1+ 2.9+) 210311 C65 0.4- 0.4+ 210409 F65 0.2- 0.1- 210424 C10 0.5+ 1.7- 210311 C65 0.2- 0.3- 210409 F65 0.4- 0.1+ 210505 858 0.4- 0.2- 210311 C65 0.6+ 0.4+ 210409 F65 0.4- 0.1+ 210505 858 0.7- 0.1+ 210311 C65 0.5+ 0.3- 210409 F65 0.4- 0.0 210505 858 0.1- 0.2+ 210312 Z33 0.5- 0.2- 210414 N51 0.7+ 0.2- 210507 G40 0.1- 0.4- 210312 Z33 0.1- 0.2+ 210414 N51 0.6+ 0.2- 210507 G40 0.3- 0.1- 210314 033 0.2- 0.4+ 210414 N51 1.0+ 0.4- 210522 T05 0.1+ 0.1+ 210314 033 0.2- 0.3+ 210414 N51 0.6+ 0.1- 210522 T05 0.0 0.4- 210314 033 0.1- 0.3+ 210414 N51 0.8+ 0.4+ 210522 T05 0.0 0.1- 210314 033 0.3- 0.2+ 210414 N51 0.2+ 0.1- 210522 T05 0.7+ 0.2- 210314 N51 0.4- 0.4- 210414 N51 0.6+ 0.2- 210524 T08 0.1- 0.1+ 210314 N51 0.2- 0.1- 210414 N51 0.9+ 0.2+ 210524 T08 0.0 0.4- 210314 N51 0.3+ 0.4+ 210417 B96 0.0 1.0+ 210524 T08 0.6- 0.7- 210314 N51 0.2- 0.2- 210417 215 0.3- 0.2- 210524 T08 0.3- 0.2+ 210314 N51 0.2+ 0.6- 210417 215 0.4- 0.0 210529 213 0.5+ 1.0+ 210314 N51 0.3+ 0.1+ 210417 B96 0.4+ 0.9+ 210529 213 0.4+ 0.2+ 210314 N51 0.0 0.1+ 210417 215 0.1+ 0.5- 210601 C10 0.8+ 0.1- 210314 N51 0.1- 0.0 210418 N51 0.3+ 0.4- 210601 C10 0.1+ 0.2- 210314 N51 0.1+ 0.1- 210418 N51 0.4+ 0.0 210608 Q11 0.0 0.1- 210314 N51 0.2- 0.4- 210418 N51 0.2+ 0.1- 210608 Q11 0.1- 0.4- 210318 H06 0.2+ 0.5- 210418 N51 0.1+ 0.2- 210613 A77 0.1+ 0.3+ 210318 H06 0.2- 0.1+ 210420 858 0.1- 0.0 210613 A77 0.1- 0.2+ 210319 Z08 0.5- 0.5- 210420 858 0.5- 0.3+ 210613 A77 0.5- 0.0 ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2021 June 24