Nakano Note (Nakano wa Kangaeru noda) NK 1977 P/2010 J5 (McNaught)

The following improved orbital elements, by S. Nakano, are from 107 observations 2005 Nov. 1 to 2010 July 4. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.60 arc second. Epoch = 2009 Nov. 25.0 TT T = 2009 Nov. 6.46252 +/- 0.05644 (m.e.) TT Peri. = 150.35865 +/- 0.00782 Node = 65.66642 +/- 0.00010 (2000.0) Inc. = 7.35402 +/- 0.00005 q = 3.7487427 +/- 0.0000091 AU e = 0.0878070 +/- 0.0000073 a = 4.1095938 +/- 0.0000083 AU n' = 0.11830572 +/- 0.00000036 P = 8.331 +/- 0.0000253 years Comet has passed T in 2001 for the reference. [ T = 2001 June 21.90877 TT Epoch = 2001 June 20.0 TT Peri. = 149.24777 e = 0.0875796 Node = 65.74750 (2000.0) a = 4.1131659 AU Inc. = 7.35463 n'= 0.11815163 q = 3.7529366 AU P = 8.342 years ] The predicted orbit for the 2018 return is as follows: T = 2018 Jan. 29.26022 TT Epoch = 2018 Feb. 11.0 TT Peri. = 146.67338 e = 0.0905416 Node = 65.52174 (2000.0) a = 4.1242850 AU Inc. = 7.36283 n'= 0.11767415 q = 3.7508657 AU P = 8.376 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2005/ 100515 372 0.1- 0.7- 100603 D96 (5.1- 5.0-) 051101 691 0.1+ 0.2+ 100515 372 0.3+ 0.0 100603 213 0.2- 0.1- 051101 691 0.7- 0.0 100515 372 0.3- 0.7- 100604 213 0.0 0.8- 051101 691 0.4+ 0.3+ 100516 J24 1.5+ 0.4- 100604 213 0.3- 0.5- 051101 G96 0.9+ 0.2- 100516 J24 (2.1+ 0.1+) 100604 367 0.1+ 0.2+ 051101 G96 0.4+ 0.4- 100516 J24 (2.2+ 0.2+) 100604 367 0.8+ 0.5- 051101 G96 0.3+ 0.3- 100516 J24 1.0+ 1.1+ 100605 704 1.8+ 0.0 051101 G96 0.2+ 0.4- 100517 H06 0.6+ 0.2+ 100605 704 1.2+ 0.1+ 051204 G96 0.2- 0.2- 100517 H06 0.0 0.5+ 100605 704 0.9+ 0.6+ 051204 G96 0.4- 0.3- 100517 H06 0.6- 0.5+ 100605 704 0.2+ 0.4+ 051204 G96 0.1+ 0.4- 100517 349 0.5- 1.2- 100605 704 0.1- 1.6+ 051204 G96 0.5- 0.2+ 100517 349 1.1- 1.7- 100605 046 1.9+ 1.4+ 2009/ 100517 D96 0.5- 0.2- 100605 046 1.9+ 1.3+ 090228 G96 0.3- 0.5- 100517 D96 0.3- 0.3- 100605 046 0.6- 0.1+ 090228 G96 0.3+ 0.3- 100518 J75 0.5- 0.5- 100605 046 0.1- 0.7- 090228 G96 0.9- 0.1- 100518 J75 0.4- 0.0 100606 585 1.4- 0.5- 090228 G96 1.8+ 0.2+ 100518 J75 0.1- 0.3+ 100606 585 0.0 1.0+ 090325 G96 0.0 0.1+ 100520 H10 0.6- 0.3+ 100611 G96 0.3+ 0.8- 090325 G96 0.9- 0.2+ 100520 H10 0.3+ 0.0 100611 G96 0.2- 0.7- 090325 G96 0.4+ 0.2+ 100520 H10 0.2- 0.8- 100611 G96 0.0 0.4- 090325 G96 0.6- 0.0 100520 H10 0.4- 0.3- 100611 G96 0.2+ 0.8- 2010/ 100520 941 0.6- 0.1+ 100611 H10 (2.8+ 0.2-) 100512 E12 0.5+ 0.6- 100520 941 0.3- 0.2- 100611 H10 (2.8+ 0.8-) 100512 E12 0.0 0.8+ 100520 941 0.2- 0.3- 100612 704 (0.8- 2.6+) 100512 E12 0.7- 0.2- 100521 E12 0.1+ 0.4- 100612 704 1.7- 0.8+ 100512 E12 0.0 0.3+ 100521 E12 0.1+ 0.0 100612 704 (1.0- 3.2+) 100512 E12 0.4- 0.4- 100522 H10 0.7+ 0.4- 100612 704 0.3- 0.3+ 100512 E12 0.2- 0.5- 100522 H10 0.2+ 0.5- 100612 461 0.5- 0.4+ 100512 E12 0.4- 0.4- 100522 E12 0.5+ 0.1+ 100612 461 0.9+ 0.1+ 100513 E12 0.2- 0.2+ 100522 B33 0.1- 0.7+ 100618 G96 0.2- 0.4+ 100513 E12 0.2+ 0.5- 100522 B33 0.9- 0.9- 100618 G96 0.3- 0.1+ 100514 E12 0.3- 0.4- 100522 B33 0.7- 0.9- 100618 G96 0.3+ 0.1+ 100514 E12 0.4- 0.1- 100523 585 0.6+ 0.7+ 100618 G96 0.1- 0.4+ 100514 D90 0.8+ 0.1+ 100523 585 0.8+ 0.7+ 100619 585 (3.7- 0.5-) 100514 D90 0.3+ 0.5- 100523 204 0.2+ 0.1+ 100703 215(10.1- 2.9+) 100514 D90 0.3+ 0.3- 100524 204 0.3+ 0.0 100703 215 (9.7- 2.8+) 100514 D96 0.5- 0.8+ 100524 H06 1.3- 0.6+ 100703 215 (9.2- 3.0+) 100514 D96 0.4+ 0.6+ 100524 H06 1.6- 0.3+ 100704 G96 0.1- 0.2+ 100514 D96 0.7- 0.1+ 100524 H06 (2.1- 0.1-) 100704 G96 0.2- 0.0 100514 D90 0.0 0.2+ 100601 H10 0.4+ 0.1- 100704 G96 0.6+ 0.2+ 100514 D90 0.1- 0.1+ 100603 D96 (1.8- 3.1-) 100704 G96 0.1- 0.3+ ( ) -------- Rejected Obs.

Associate of Central Bureau for Astronomical Telegrams Late edition Syuichi Nakano 2010 July 11

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