Nakano Note (Nakano wa Kangaeru noda) NK 3692 P/Hill (2006 D1 = 2018 T1)

The following improved orbital elements, by S. Nakano, are from 89 observations 2005 to 2018. 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. The residuals from the prediction in NK 2888 (= HICQ 2018) were +88" for Right Ascension and -28" for Declination with the delta-T correction = -0.060 day. Epoch = 2018 Dec. 28.0 TT T = 2018 Dec. 21.44079 +/- 0.00161 (m.e.) TT Peri. = 119.42807 +/- 0.00061 Node = 359.96400 +/- 0.00005 (2000.0) Inc. = 17.36551 +/- 0.00006 q = 1.8951980 +/- 0.0000112 AU e = 0.6593139 +/- 0.0000020 a = 5.5628855 +/- 0.0000459 AU n' = 0.07511971 +/- 0.00000093 P = 13.120 +/- 0.0001623 years (+/- 0.06 day) T = 2005 Oct. 25.99595 TT Epoch = 2005 Nov. 6.0 TT Peri. = 118.19561 e = 0.6593772 Node = 0.95196 (2000.0) a = 5.5551321 AU Inc. = 17.45993 n'= 0.07527703 q = 1.8922049 AU P = 13.093 years The predicted orbit for the 2032 return is as follows: T = 2032 Jan. 17.56842 TT Epoch = 2032 Jan. 9.0 TT Peri. = 119.47401 e = 0.6593469 Node = 359.74766 (2000.0) a = 5.5506742 AU Inc. = 17.37716 n'= 0.07536774 q = 1.8908542 AU P = 13.077 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2005/ 060224 734 0.0 1.0- 060305 673 1.3+ 0.0 051205 703 0.7- 0.5- 060224 734 0.4+ 0.1+ 060305 673 1.4+ 0.1+ 051205 703 1.8- 0.4+ 060224 682 0.2- 0.1- 060319 215 0.0 0.6+ 051205 703 1.1+ 1.4- 060224 682 0.6- 0.0 060321 G96 0.5- 0.2+ 051205 703 1.2+ 0.5+ 060224 682 0.5- 0.4+ 060321 G96 0.4- 0.3+ 051205 703 1.6- 0.7+ 060224 701 1.1+ 0.1+ 060321 G96 0.0 0.3+ 051205 703 (2.2- 1.3+) 060224 H36 0.5- 0.3- 060321 G96 0.3- 0.0 051205 703 0.1- 0.2- 060224 H36 0.2+ 0.4- 060324 691 0.2+ 0.4+ 2006/ 060224 H36 0.4- 0.7- 060324 691 0.1+ 0.5+ 060102 704 (0.3- 2.0-) 060224 701 0.2+ 0.6+ 060324 691 0.0 0.3+ 060102 704 1.4- 1.2+ 060224 701 0.2+ 0.4+ 060325 213 0.4- 0.1+ 060102 704 (3.6- 0.6+) 060224 G96 0.4+ 0.4- 060325 213 0.6- 0.2+ 060222 703 0.4+ 0.6- 060224 G96 0.4+ 0.4- 060325 213 0.6- 0.2+ 060222 703 0.2- 1.3+ 060224 G96 0.1- 0.2- 060326 H06 0.6+ 1.2- 060222 703 0.0 0.5- 060224 G96 0.2+ 0.6- 060326 H06 0.1+ 0.6+ 060222 703 (3.2- 0.9+) 060227 850 0.6- 1.0+ 060402 G96 0.2- 0.5+ 060222 703 1.9- 1.1+ 060227 850 0.4- 0.0 060402 G96 0.2- 0.8+ 060222 703 (3.1- 1.6+) 060228 704 0.7- 0.6+ 060402 G96 0.3- 1.0+ 060222 703 0.8- 0.3- 060228 704 1.1- 0.3+ 060402 G96 0.2- 0.4+ 060222 703 (2.0- 0.5-) 060228 704 0.7+ 1.2- 060407 673 0.2+ 0.3+ 060223 734 0.1- 0.0 060228 704 0.3- 0.6- 060407 673 0.3+ 0.3+ 060223 734 0.1- 0.5- 060302 204 0.0 0.0 060407 673 0.5+ 0.4+ 060223 734 0.7- 0.6- 060302 204 0.0 0.3+ 060407 673 0.2+ 0.0 060223 649 0.1- 0.5- 060302 204 0.8- 0.3- 2018/ 060223 649 0.3- 0.6- 060304 213 0.3+ 0.5- 181005 461 0.1- 0.6+ 060223 649 0.4+ 0.5- 060304 213 0.0 0.4- 181005 461 0.2- 0.2+ 060223 673 1.0+ 1.1- 060304 213 0.1+ 0.2- 181005 461 0.2- 0.4+ 060223 673 0.6+ 0.3- 060304 G96 0.1- 0.4- 181005 U69 0.3+ 0.5- 060223 673 1.7+ 0.1+ 060304 G96 0.2- 0.2- 181005 U69 0.2+ 0.2+ 060224 651 1.0+ 0.3+ 060304 G96 0.7- 0.1+ 181006 461 0.3+ 0.4+ 060224 651 0.7+ 0.3- 060304 G96 0.7- 0.2+ 181006 461 0.3+ 0.4+ 060224 651 1.0+ 0.1- 060305 673 0.8+ 0.1- 181006 461 0.1+ 0.5+ 060224 734 0.6+ 0.0 060305 673 0.6+ 0.2+ ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2018 Oct. 10

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