Nakano Note (Nakano wa Kangaeru noda) NK 4607 P/Kobayashi (1997 B1 = 2021 W2)
The following improved orbital elements, by S. Nakano, are from 257 observations 1997 to 2022. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.48 arc second. Residuals of the recovery observations on 2021 Nov.29 were -0.48 deg for Right Ascension and +0.25 deg for Declination from the prediction in NK 3978 (= HICQ 2021) computed by T. Kobayashi, Oizumi, Gunma-ken with the delta-T correction = +1.13 days. See the previous orbits in MPC 29568, MPC 29880, MPC 30063, NK3978 and CBET 5091 (same orbit). Epoch = 2022 Apr. 11.0 TT T = 2022 Mar. 29.95157 +/- 0.00052 (m.e.) TT Peri. = 183.31873 +/- 0.00021 Node = 328.88221 +/- 0.00003 (2000.0) Inc. = 12.33955 +/- 0.00002 q = 2.0562357 +/- 0.0000019 AU e = 0.7604797 +/- 0.0000002 a = 8.5848060 +/- 0.0000109 AU n' = 0.03918396 +/- 0.00000007 P = 25.153 +/- 0.0000481 years T = 1997 Mar. 2.35266 TT Epoch = 1997 Mar. 13.0 TT Peri. = 183.34246 e = 0.7607715 Node = 329.06412 (2000.0) a = 8.5883323 AU Inc. = 12.34988 n'= 0.03915983 q = 2.0545736 AU P = 25.169 years The predicted orbit for the 2047 return is as follows: T = 2047 June 5.23153 TT Epoch = 2047 June 19.0 TT Peri. = 183.38544 e = 0.7610427 Node = 328.71583 (2000.0) a = 8.6217762 AU Inc. = 12.32303 n'= 0.03893220 q = 2.0602366 AU P = 25.316 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1997/ 970209 402 0.1+ 0.4- 970307 355 0.9+ 0.4+ 970130 411 1.0+ 0.7- 970209 402 0.5- 0.3- 970307 355 0.0 0.1+ 970130 411 0.6- 0.2+ 970209 402 0.7- 0.5- 970307 355 0.8+ 0.4+ 970131 411 0.0 0.4+ 970209 557 0.8- 0.4- 970308 411 0.0 0.5+ 970131 411 0.6+ 0.4+ 970209 557 0.7- 0.1- 970308 411 0.8- 0.2- 970201 411 0.4+ 0.1+ 970209 557 0.6- 0.2- 970308 411 0.7- 0.3- 970201 411 0.6+ 0.6+ 970210 046 0.2+ 0.0 970308 402 0.3- 0.4- 970201 411 0.2+ 0.2+ 970210 046 0.1- 0.2- 970308 402 0.0 0.4- 970201 411 0.3- 0.4- 970210 046 0.1- 0.2- 970308 402 0.1+ 0.3- 970202 367 0.6- 1.5+ 970211 385 1.2- 0.1+ 970309 411 0.7- 0.2+ 970202 367 0.1- 0.9+ 970211 385 1.3- 0.1+ 970309 411 0.1+ 0.4- 970202 046 0.2- 0.0 970211 385 1.0- 0.2+ 970309 411 0.3- 0.0 970202 046 0.3- 0.5+ 970211 411 0.9- 0.1- 970309 385 0.1+ 0.2- 970202 046 0.8- 0.0 970211 411 0.3- 0.2+ 970309 385 0.3- 0.0 970202 046 0.9- 0.2+ 970211 355 0.7- 0.6- 970309 385 0.2- 0.0 970202 046 1.3+ 0.2+ 970211 355 0.7- 0.2- 970310 046 0.5- 0.1- 970202 046 0.0 0.1- 970211 355 0.8- 0.3- 970310 046 0.3- 0.0 970203 709 0.3- 0.1+ 970211 897 0.4- 0.2+ 970310 046 0.3- 0.1- 970203 709 0.1- 0.0 970211 897 0.6- 0.1+ 970310 979 0.2- 0.1+ 970203 709 0.0 0.0 970212 411 0.9- 0.7+ 970310 979 0.4- 0.2+ 970203 709 0.0 0.0 970212 411 1.2- 0.2+ 970312 411 0.5- 0.2- 970203 709 0.3- 0.0 970214 966 1.3- 0.3+ 970312 411 0.3- 0.1- 970203 709 0.4- 0.0 970214 966 0.4+ 0.2- 970312 411 0.1- 0.0 970203 897 0.3+ 0.4- 970214 411 0.4- 0.6+ 970317 402 0.3+ 0.1+ 970203 897 0.7- 0.2- 970214 411 0.2+ 0.8+ 970317 402 0.0 0.1+ 970203 897 0.8+ 0.9- 970214 411 0.2- 0.5+ 970317 402 0.4+ 0.0 970203 411 0.0 0.4- 970214 367 0.3+ 0.1- 970324 658 1.0+ 1.1+ 970203 411 0.5- 0.1+ 970214 367 0.1- 0.1+ 970324 658 1.3+ 0.7+ 970203 355 0.4+ 0.0 970214 900 0.2- 0.0 970324 658 (2.1+ 0.1+) 970203 355 0.3- 0.3- 970214 900 0.1- 0.0 970324 897 0.3+ 1.9+ 970203 355 0.1+ 0.3+ 970216 411 0.1+ 0.1- 970331 360 0.3- 0.0 970203 557 0.0 0.3- 970216 411 0.1+ 0.2- 970331 360 0.0 0.1+ 970203 557 0.2- 0.2+ 970216 411 0.3+ 0.4- 970331 867 0.3+ 0.1- 970203 557 0.7- 0.1- 970217 411 0.4+ 0.3+ 970331 867 0.1+ 0.0 970203 557 0.3- 0.2- 970217 411 0.1+ 0.0 970331 867 0.1+ 0.0 970203 046 0.2+ 0.0 970217 411 0.0 0.1+ 970331 118 0.8+ 0.8+ 970203 046 0.0 0.1+ 970219 900 0.7- 0.3- 970331 118 1.0+ 0.7+ 970203 046 0.3+ 0.1- 970219 900 0.0 0.1+ 970331 118 1.0+ 0.9+ 970204 709 0.0 0.3+ 970220 118 0.5+ 0.3- 970402 118 0.8+ 0.4- 970204 709 0.2- 0.1+ 970220 118 0.0 1.4- 970402 118 1.4+ 0.0 970204 709 0.1- 0.2+ 970220 118 1.0+ 0.7- 970410 411 0.2+ 0.0 970204 709 0.1- 0.2+ 970224 867 0.3- 0.1- 970410 411 0.3+ 0.1- 970204 608 0.4- 0.4+ 970224 867 0.1+ 0.3+ 970410 411 0.7+ 0.4- 970204 608 0.5- 0.8+ 970224 867 0.5+ 0.1+ 970410 897 0.4- 0.9+ 970204 566 0.3- 0.4- 970226 411 0.0 0.3- 970410 897 0.4- 0.5+ 970204 566 0.2- 0.5- 970226 411 0.0 0.3- 970413 385 0.3- 1.0+ 970204 657 (2.1- 2.2+) 970226 411 0.2- 0.2- 970413 385 1.9+ 1.0+ 970204 566 0.5- 0.0 970227 402 0.0 0.6+ 970413 385 0.5+ 0.2+ 970204 657 0.5- 0.8+ 970227 402 0.3- 0.4+ 970424 402 0.3+ 0.8- 970204 657 0.1- 1.0- 970227 402 0.2- 0.4+ 970424 402 0.2+ 0.3- 970204 897 0.1+ 0.5- 970227 360 0.1- 0.3- 970424 402 1.2+ 0.3- 970204 897 0.4+ 0.5+ 970227 360 0.1+ 0.1+ 970429 360 0.5+ 0.7+ 970204 327 0.6- 0.8- 970227 360 0.1- 0.2+ 970429 360 1.1+ 0.7+ 970204 327 0.1+ 0.1- 970301 411 0.4- 0.0 970501 118 1.4+ 0.1+ 970204 327 0.9- 0.6- 970301 411 0.1- 0.0 970501 118 0.6+ 0.7+ 970204 327 0.2- 0.2- 970302 046 0.2- 0.1- 970504 411 0.0 0.4- 970204 360 0.3+ 0.0 970302 046 0.5+ 0.2- 970504 402 0.1+ 1.1- 970204 360 0.3+ 0.0 970302 046 0.2- 0.2- 970504 402 1.5+ 0.2+ 970204 360 0.0 0.0 970302 046 0.0 0.2- 970504 402 0.7+ 0.5+ 970205 608 0.4+ 0.9+ 970303 411 0.3+ 0.5- 970526 360 0.4- 0.0 970205 608 0.5+ 0.9+ 970303 411 0.5+ 0.1- 970526 360 0.5+ 0.4- 970205 402 0.6+ 0.0 970303 411 0.3+ 0.0 970528 402 (2.4+ 2.0+) 970205 402 0.5+ 0.1+ 970304 411 0.1- 0.1+ 970528 402 0.9- 1.0+ 970205 402 0.6+ 0.1+ 970304 411 0.1- 0.2+ 970528 402 1.4+ 0.3+ 970205 402 0.4+ 0.2- 970304 411 0.1- 0.1+ 2021/ 970206 657 0.1+ 1.2- 970304 355 0.3- 0.0 211109 F52 0.2+ 0.1+ 970206 657 0.3+ 0.8- 970304 897 0.2+ 0.4- 211109 F52 0.0 0.0 970206 657 0.5- 0.9- 970304 355 0.6+ 0.7+ 211111 F51 0.0 0.2+ 970206 385 0.7- 0.6- 970304 897 1.0+ 0.1- 211113 F52 0.6+ 0.3- 970206 385 0.2- 0.2- 970304 355 0.1+ 0.6- 211113 F51 0.1+ 0.0 970206 385 0.4- 0.2- 970304 897 0.4+ 0.5- 211118 F52 0.2+ 0.1+ 970206 411 0.1+ 0.9- 970304 402 0.2- 0.3- 211118 F51 0.1- 0.4+ 970206 411 0.5+ 0.5- 970304 402 0.0 0.4- 211118 F51 0.5+ 0.2+ 970206 046 0.1- 0.2- 970304 402 0.1+ 0.3- 211119 F52 0.1+ 0.0 970206 046 0.4+ 0.3- 970304 104 0.6+ 0.3- 211119 F51 0.3+ 0.0 970206 046 0.4+ 0.3- 970304 104 0.3- 0.1+ 211120 F51 0.5- 0.3- 970207 108 (2.0+ 0.7-) 970304 104 0.1- 0.0 211129 V00 0.0 0.1+ 970207 108 0.3- 0.6- 970304 104 0.5- 0.3+ 211129 V00 0.3+ 0.1+ 970207 108 0.2- 1.2- 970305 411 0.4- 0.4- 211129 V00 0.1- 0.0 970208 900 0.7+ 0.5- 970305 411 0.0 0.0 211129 V00 0.1+ 0.1+ 970208 900 0.5- 0.1- 970305 411 0.1- 0.4+ 2022/ 970208 108 (3.4- 0.1-) 970305 360 0.1+ 0.2- 220107 F52 0.2- 0.1+ 970209 108 0.0 1.1- 970305 360 0.2+ 0.2- 220107 F52 0.2- 0.1+ 970209 670 0.2+ 0.3+ 970305 402 0.0 0.2- 220107 F52 0.0 0.1+ 970209 670 (1.0+ 2.7-) 970305 402 0.1+ 0.1- 220107 F52 0.1- 0.1+ 970209 670 0.5+ 0.5+ 970305 402 0.2- 0.0 220111 D29 0.5+ 0.6+ 970209 360 0.0 0.4- 970307 411 0.4- 0.6- 220111 D29 0.0 0.9+ 970209 360 0.1+ 0.6- 970307 411 0.2- 0.2+ 220111 D29 0.0 0.0 970209 360 0.2- 0.5- 970307 411 0.6+ 0.2+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2022 Jan. 12