Nakano Note (Nakano wa Kangaeru noda) NK 2919 51P/Harrington - C (1994) = D (2001) = 8SA248F (2008) = P101s67 (2015)
The following improved orbital elements, by S. Nakano, are from 174 observations 1994 to 2015, including planetary perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas, Vesta, and non-gravitational effect of style II. The mean residual is +/- 0.93 arc second. Component C and D are fragments from the principal component A (NK 2916). Identification 51P-D = P101s67 was suggested by Hidetaka Sato on COMET-ML and 51P-C = 51P-D = 8SA248F was found by Nakano. The comet has passed 0.37 AU from Jupiter on 2003 Oct. 24 UT. Residuals of 2015 observations were +1416" for R. A. and +574" for Decl. from the prediction of the principal component A in NK 2314 (= HICQ 2014) with the delta-T correction = -0.86 day. See the previous orbits NK 366 (1980 prediction), NK 489, NK 678, NK 678A, NK 961, NK961D, NK 1655, NK 1686, NK 2314 and NK 2916. Epoch = 2015 Aug. 6.0 TT T = 2015 Aug. 11.54518 +/- 0.00322 (m.e.) TT Peri. = 269.28376 +/- 0.00098 Node = 83.68151 +/- 0.00108 (2000.0) Inc. = 5.42578 +/- 0.00008 q = 1.6994067 +/- 0.0000035 AU e = 0.5423797 +/- 0.0000022 a = 3.7135738 +/- 0.0000053 AU n' = 0.13772602 +/- 0.00000029 P = 7.156 +/- 0.0000152 years A1 = +5.963 +/- 0.304 A2 = +0.06905 +/- 0.00235 T = 1994 Aug. 23.56397 TT Epoch = 1994 Sept. 5.0 TT Peri. = 233.47965 e = 0.5612320 Node = 119.26154 (2000.0) a = 3.5824498 AU Inc. = 8.65485 n'= 0.14535632 q = 1.5718644 AU P = 6.781 years T = 2001 June 5.75774 TT Epoch = 2001 June 20.0 TT Peri. = 233.60542 e = 0.5617408 Node = 119.17937 (2000.0) a = 3.5780264 AU Inc. = 8.65539 n'= 0.14562595 q = 1.5681030 AU P = 6.768 years T = 2008 June 17.98559 TT Epoch = 2008 June 23.0 TT Peri. = 269.17560 e = 0.5442054 Node = 83.76408 (2000.0) a = 3.7026068 AU Inc. = 5.42995 n'= 0.13833838 q = 1.6876281 AU P = 7.125 years The predicted orbit for the 2022 return is as follows: T = 2022 Oct. 1.74613 TT Epoch = 2022 Sept.18.0 TT Peri. = 269.23743 e = 0.5436211 Node = 83.66030 (2000.0) a = 3.7084310 AU Inc. = 5.42725 n'= 0.13801261 q = 1.6924496 AU P = 7.141 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1994/ 011209 611 2.0- 0.2+ 020103 613 0.4+ 0.6- 940613 691 0.2+ 0.1- c 011210 309 0.5- 0.1+ 020103 613 1.9+ 0.2- 940613 691 0.3+ 0.5- c 011210 349 0.4+ 1.3+ 020104 215 1.0+ 0.7- 941004 691 0.6+ 1.5+ c 011210 349 0.2+ 1.5+ 020104 215 0.2- 0.1- 941004 691 (2.8+ 0.9+)c 011210 349 1.1+ 1.1+ 020104 215 0.9+ 0.4- 941004 691 2.1+ 0.7+ c 011210 235 (3.6- 2.1+) 020104 046 0.1- 0.0 941004 691 0.2+ 1.1- c 011210 587 1.1- 0.8+ 020104 046 0.1+ 0.7- 941004 691 (7.0+ 6.4+)b 011210 587 1.1- 1.2+ 020104 046 0.3- 0.6- 941004 691 (7.3+ 6.8+)b 011211 422 0.7- 0.6+ 020104 046 0.5- 0.8- 941004 691 (8.8+ 6.0+)b 011211 422 0.4- 0.5+ 020104 235 0.2+ 0.7- 941004 691 (6.9+ 6.8+)b 011211 422 0.8- 0.4+ 020104 613 (3.9+ 0.9-) 941005 691 1.3- 1.0- c 011211 213 0.9+ 0.6+ 020106 235 1.2- 0.5- 941005 691 1.2- 1.4- c 011211 213 0.3- 0.5+ 020107 235 0.2- 0.2+ 941005 691(10.7+ 8.7+)b 011211 170 0.3+ 0.7+ 020107 170 (2.3+ 0.1+) 941005 691(10.0+ 6.6+)b 011211 213 2.0+ 0.5+ 020108 235 1.6+ 0.7- 2001/ 011211 170 0.0 0.6+ 020109 587 1.4+ 0.6- 011019 170 0.4- 1.3+ 011211 170 0.8+ 1.3+ 020109 587 0.2- 0.7- 011025 170 1.8- 0.8+ 011211 170 0.4- 1.2+ 020110 046 0.6+ 0.6- 011025 170 1.0- 0.5+ 011212 235 0.2- 1.3+ 020110 046 0.6+ 1.2- 011025 170 0.6- 0.8+ 011213 170 (2.3+ 0.8+) 020110 046 0.6+ 0.1- 011206 170 0.7- 0.7+ 011213 170 0.1- 0.5+ 020110 235 0.8+ 0.3+ 011206 170 (3.4+ 0.9+) 011213 170 (2.4- 1.6+) 020111 360 0.6+ 1.3- 011206 170 0.6+ 0.8+ 011214 235 0.6- 1.5+ 020111 360 0.5+ 0.8- 011206 213 1.8- 1.3+ 011214 046 0.2- 0.4- 020111 620 2.1+ 0.1- 011206 213 (2.4- 1.3+) 011214 046 1.3- 0.6+ 020111 213 1.2+ 2.0- 011206 213 0.8- 1.2+ 011214 046 1.5- 0.5+ 020111 213 0.5+ 1.4- 011207 170 0.6+ 0.8+ 011214 046 0.5+ 0.8+ 020111 620 2.1+ 0.1- 011207 213 (2.7- 0.1-) 011214 046 1.1+ 0.4+ 020111 620 1.4+ 0.6- 011207 213 (5.4- 1.2+) 011214 046 0.2- 0.1- 020111 170 1.4+ 1.6- 011207 213 1.6- 0.6+ 011215 587 0.7+ 0.3- 020111 170 1.9+ 0.8- 011207 213 (1.7- 3.2+) 011215 587 0.3- 0.1+ 020112 235 0.4+ 1.2- 011207 941 0.2- 0.5+ 011216 941 0.8- 0.4- 020114 704 1.8- 0.1- 011207 941 1.1- 0.8+ 011216 941 0.2+ 0.0 020114 704 1.7+ 0.0 011207 941 1.2- 1.0+ 011216 941 0.9- 0.3+ 020114 704 (6.2+ 1.9+) 011207 941 2.1- 1.3+ 011216 235 (2.4- 0.1-) 020116 046 1.5+ 0.1- 011207 170 (5.1- 1.5-) 011216 213 1.4- 0.1+ 020116 046 0.6+ 0.4- 011207 170 1.7- 0.3- 011216 213 1.7+ 0.5- 020116 235 1.1- 2.2- 011208 349 0.2- 0.2- 011218 360 0.2- 0.3- 020117 235 0.0 0.0 011208 213 0.6- 0.2+ 011218 360 0.2- 0.5- 020117 170 0.5+ 0.2+ 011208 213 (2.3- 3.9+) 011218 235 1.7- 0.3- 020117 170 (2.7+ 1.5-) 011208 611 1.0- 0.7+ 011219 213 0.6- 0.9- 020118 170 (2.8+ 1.4-) 011208 611 1.2- 0.7+ 011219 213 0.1+ 0.0 020120 170 0.7- 1.2- 011208 213 1.9+ 0.7+ 011219 170 1.4+ 0.6- 020129 461 (0.8+ 2.8-) 011208 118 1.2- 0.9+ 011220 170 2.2+ 0.1- 020129 461 (1.2+ 2.6-) 011208 118 0.8- 0.5+ 011220 170 (3.1+ 0.5-) 020129 461 0.2- 0.6- 011208 118 0.3- 0.6+ 011220 170 1.7+ 0.1- 020131 620 0.8- 1.9- 011208 118 0.6- 0.8+ 011220 170 2.1+ 0.8+ 020131 620 0.9- 2.2- 011208 611 1.1- 0.3+ 011220 170 0.8+ 0.5+ 020201 402 0.2- 1.6- 011209 170 0.7- 1.7+ 011222 213 0.5- 0.0 020201 402 0.8+ 1.4- 011209 170 0.2- 0.4+ 011222 213 2.2+ 0.0 020201 402 1.2+ 0.6- 011209 170 0.9- 1.7+ 011222 213 1.2- 0.8+ 020201 620 1.3- 1.0- 011209 309 0.7- 0.0 011222 213 0.9+ 0.0 020201 620 0.4+ 0.8+ 011209 691 0.8- 0.3+ 011223 461 0.8+ 0.4- 020202 170 0.1- 1.2- 011209 118 1.3- 0.4+ 011223 461 0.6+ 0.7- 020202 170 0.3+ 1.1- 011209 118 0.7- 1.0+ 011223 461 0.1- 0.1+ 020202 170 0.2+ 1.8- 011209 118 1.1- 0.6+ 011223 461 0.1+ 0.1- 020207 360 0.1+ 1.2- 011209 235 0.2+ 2.2+ 011223 235 0.5+ 0.6+ 020207 360 0.3+ 1.3- 011209 046 0.7- 0.1+ 011224 170 (3.1+ 0.2-) 020207 360 0.2+ 1.8- 011209 046 0.5- 0.0 011224 170 0.3+ 0.2- 020310 587 (5.5- 3.7-) 011209 046 0.6+ 0.5+ 011224 461 0.0 0.8+ 020310 587 (3.0- 2.5-) 011209 046 0.8- 0.6+ 011225 213 (4.0- 0.8+) 2008/ 011209 046 1.1- 1.0+ 011225 213 0.3- 1.9- 080929 G96 0.1- 0.2+ 011209 046 1.2+ 0.3+ 011225 213 2.1- 0.5- 080929 G96 0.2+ 0.4- 011209 046 (2.3+ 0.9+) 011225 170 0.0 0.5- 080929 G96 1.0+ 0.5+ 011209 046 0.2+ 1.0+ 011225 170 (4.1+ 1.2-) 080929 G96 0.7+ 0.2+ 011209 170 0.3+ 0.3+ 011226 349 0.4+ 0.5- 2015/ 011209 170 0.6- 0.2+ 011226 349 0.6+ 1.9+ 150530 F51 0.4- 1.0+ 011209 170 0.4+ 0.3+ 2002/ 150530 F51 0.6- 0.8+ 011209 170 1.4+ 1.5+ 020101 235 0.8+ 0.6+ 150530 F51 0.4- 1.1+ 011209 611 0.6- 0.3+ 020102 235 0.5- 2.0- 150530 F51 0.2- 0.9+ 011209 611 1.7- 0.3+ 020103 613 (2.6+ 0.7-) ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2015 June 4