Nakano Note (Nakano wa Kangaeru noda) NK 3008 P/LINEAR-Catalina (2003 WC7 = 2015 T1)

The following improved orbital elements, by S. Nakano, are from 120 observations 2003 to 2015. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.61 arc second. The residuals of recovery observations from the prediction in NK 1118 (= HICQ 2015) were -0.29 deg. for R. A. and -0.19 deg for Decl. with the delta-T correction = +0.37 day. Epoch = 2015 Dec. 4.0 TT T = 2015 Dec. 5.55243 +/- 0.00030 (m.e.) TT Peri. = 342.37917 +/- 0.00018 Node = 88.77517 +/- 0.00006 (2000.0) Inc. = 21.46163 +/- 0.00003 q = 1.6595550 +/- 0.0000015 AU e = 0.6797394 +/- 0.0000003 a = 5.1818895 +/- 0.0000012 AU n' = 0.08355489 +/- 0.00000003 P = 11.796 +/- 0.0000043 years T = 2004 Feb. 5.74601 TT Epoch = 2004 Feb. 5.0 TT Peri. = 341.05758 e = 0.6809561 Node = 89.88792 (2000.0) a = 5.1870328 AU Inc. = 21.22018 n'= 0.08343064 q = 1.6548913 AU P = 11.813 years The predicted orbit for the 2027 return is as follows: T = 2027 Sept.25.87917 TT Epoch = 2027 Oct. 2.0 TT Peri. = 343.69256 e = 0.6784798 Node = 87.63724 (2000.0) a = 5.1751026 AU Inc. = 21.72515 n'= 0.08371931 q = 1.6638999 AU P = 11.773 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2003/ 040202 699 1.4+ 0.9+ 040319 704 0.7+ 0.2+ 031118 704 0.1+ 0.3+ 040206 213 (3.9+ 1.6-) 040319 704 1.2+ 0.8+ 031118 704 0.0 0.6+ 040209 104 0.4- 0.2+ 040322 704 0.4- 0.3+ 031118 704 0.3- 1.6+ 040209 104 0.5- 0.1+ 040322 704 0.5+ 0.1- 031118 704 0.6- 1.1+ 040209 104 0.6- 0.4+ 040322 704 0.5+ 0.0 031119 704 0.7- 0.8+ 040209 204 0.6- 0.4+ 040322 704 0.6+ 0.0 031119 704 0.5+ 0.1- 040209 204 0.8- 0.6+ 040322 704 0.4- 1.1- 031119 704 0.9- 0.2- 040209 204 0.2- 1.0+ 040323 704 1.0- 0.1+ 031119 704 0.1+ 0.4+ 040212 360 0.4- 0.3- 040323 704 0.1- 0.2- 031119 704 0.2+ 0.1+ 040212 360 0.6- 0.4- 040323 704 0.1- 0.8+ 031120 704 1.0+ 0.1+ 040215 349 0.3- 0.2+ 040323 701 1.7+ 0.8+ 031120 704 0.1+ 0.2+ 040215 349 0.1- 0.4- 040323 704 0.5+ 0.4+ 031120 704 (1.1+ 2.4+) 040215 349 0.1- 0.0 040323 701 1.4- 1.0- 031120 704 1.1+ 0.6+ 040215 349 0.5- 0.7- 040323 704 0.2- 1.0+ 031216 703 0.3- 1.7+ 040216 A33 0.9- 0.4- 040323 701 0.8- 1.0- 031216 703 0.0 1.4+ 040216 A33 0.3- 0.9- 040408 360 1.3- 0.8- 031216 703 (0.4- 2.8+) 040216 A33 0.4- 0.4- 040408 360 0.1- 0.8- 031216 703 0.0 1.1+ 040217 704 0.3- 0.4+ 040408 360 1.0- 1.4- 031216 704 0.6- 0.5+ 040217 704 1.2+ 0.1+ 040411 360 0.0 0.1- 031216 704 0.6- 0.2- 040217 704 0.4+ 0.4+ 040411 360 0.3- 0.7+ 031216 704 0.7- 0.2+ 040217 704 0.4+ 0.5+ 040411 360 0.0 0.2+ 2004/ 040217 704 0.8+ 0.4+ 040411 360 0.4- 0.3+ 040131 703 0.2- 1.0+ 040218 D83 (2.8- 0.5-) 2015/ 040131 703 1.0- 0.4+ 040218 D83 0.4+ 0.5- 151010 F51 0.0 0.2- 040131 703 0.3+ 0.9+ 040218 D83 (0.4+ 3.0-) 151010 F51 0.0 0.2- 040131 703 0.4- 0.9+ 040220 215 0.4+ 0.4- 151010 F51 0.0 0.2- 040131 118 0.0 1.3- 040220 215 0.6- 0.3- 151010 F51 0.0 0.2- 040131 118 0.4- 0.9- 040220 A33 0.3+ 0.7- 151011 C10 0.4+ 0.5+ 040131 118 0.1- 0.3+ 040220 A33 0.0 0.4- 151011 958 1.2+ 0.4+ 040131 118 0.5- 0.1- 040222 H41 0.5+ 0.8+ 151011 C10 0.0 0.2- 040131 859 0.7+ 0.4+ 040222 H41 (1.6+ 2.6-) 151011 958 1.0+ 0.0 040131 859 0.7- 0.6+ 040222 H41 0.9+ 0.2- 151011 C10 0.2- 0.3- 040131 859 0.5- 0.3+ 040222 H41 0.9+ 0.6+ 151011 958 0.7+ 0.3- 040201 673 0.5- 1.1+ 040222 H41 1.5- 0.8- 151011 C10 0.5+ 0.3+ 040201 673 0.2- 0.8+ 040223 213 0.5+ 0.2- 151011 H36 0.1+ 0.2- 040201 673 0.8+ 1.4+ 040223 213 0.1- 0.3- 151011 H36 0.4+ 0.2+ 040201 673 0.1- 1.0+ 040307 699 0.9+ 1.0- 151011 H36 0.5+ 0.1+ 040201 413 0.6- 0.2+ 040307 699 1.5+ 0.4- 151012 K62 0.2- 0.6- 040201 413 0.5- 0.0 040307 699 0.2- 0.9- 151012 K62 0.6- 1.3- 040201 413 0.3- 0.0 040307 699 1.1+ 0.5- 151012 K62 1.0+ 0.6- 040201 413 0.3- 0.0 040314 D83 1.7- 0.5- 151012 K62 0.2- 0.2- 040202 699 0.5+ 0.1+ 040314 D83 (0.3- 3.3-) 151012 K62 0.3+ 0.4+ 040202 699 0.1- 0.1+ 040319 704 0.2- 0.3+ 151012 K62 0.6+ 0.6+ 040202 699 0.2+ 1.0- 040319 704 (5.4+ 0.9+) ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2015 Oct. 13

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