Nakano Note (Nakano wa Kangaeru noda) NK 2364 272P/NEAT (2004 F1 = 2012 V3)

The following improved orbital elements, by S. Nakano, are from 67 observations 2003 to 2012. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.57 arc second. The delta-T correction for the prediction in NK 1227 (= HICQ 2012) was -0.61 day with the residuals of +749" (R. A.) and +54" (Decl.). Epoch = 2013 Mar. 9.0 TT T = 2013 Feb. 27.17261 +/- 0.00679 (m.e.) TT Peri. = 27.89052 +/- 0.00162 Node = 109.50269 +/- 0.00028 (2000.0) Inc. = 18.10160 +/- 0.00008 q = 2.4166893 +/- 0.0000177 AU e = 0.4557396 +/- 0.0000046 a = 4.4403182 +/- 0.0000112 AU n' = 0.10533748 +/- 0.00000040 P = 9.357 +/- 0.0000354 years T = 2003 Oct. 19.79951 TT Epoch = 2003 Oct. 8.0 TT Peri. = 26.37444 e = 0.4515075 Node = 111.91118 (2000.0) a = 4.4681435 AU Inc. = 18.27180 n'= 0.10435503 q = 2.4507431 AU P = 9.445 years The predicted orbit for the 2022 return is as follows: T = 2022 July 17.04996 TT Epoch = 2022 June 30.0 TT Peri. = 27.89622 e = 0.4546946 Node = 109.46962 (2000.0) a = 4.4602401 AU Inc. = 18.07412 n'= 0.10463253 q = 2.4321931 AU P = 9.420 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2003/ 040319 J87 0.3+ 0.5+ 040408 360 0.3- 0.5- 031201 704 0.5- 0.6- 040319 J87 0.1+ 0.2+ 040408 360 0.3+ 0.2+ 031201 704 0.4- 0.5+ 040319 926 0.4+ 0.7- 040409 213 0.5+ 0.8- 031201 704 1.1+ 0.8+ 040319 926 0.4+ 0.4+ 040411 360 0.1+ 0.3- 2004/ 040319 926 0.2- 0.6+ 040411 360 0.7+ 0.3- 040216 704 0.3- 0.6+ 040319 673 0.2+ 0.2- 040411 360 0.6+ 0.1- 040216 704 (2.0+ 2.8+) 040319 649 0.5- 0.4- 040414 215 1.0- 0.3- 040216 704 0.6- 1.6+ 040319 673 0.2+ 0.1+ 040415 850 0.4+ 0.4- 040216 704 0.7- 1.6+ 040319 673 0.4+ 0.2+ 040415 850 0.5+ 0.2- 040216 704 0.4- 0.6+ 040319 649 0.6- 0.2- 040415 850 1.3- 0.5+ 040314 704 1.3+ 0.4+ 040319 673 0.3+ 0.1- 040420 360 0.2+ 1.1- 040314 704 1.6+ 0.1+ 040319 649 0.3- 0.2- 040420 360 0.4+ 0.5- 040314 704 (2.1+ 0.1-) 040319 649 0.1- 0.3- 040420 360 0.3+ 0.0 040314 704 (2.2- 1.9+) 040319 649 0.5- 0.4- 040421 204 0.3+ 0.2- 040318 703 1.2- 0.2- 040319 946 0.1+ 0.1+ 040421 204 1.5+ 0.4- 040318 644 0.3+ 0.4+ 040319 946 0.9- 0.2- 2012/ 040318 703 1.2- 0.9+ 040320 360 0.4+ 0.7+ 121112 G96 0.2+ 0.1- 040318 644 0.4+ 0.1+ 040320 360 0.2- 0.7+ 121112 G96 0.3+ 0.3- 040318 703 1.3- 0.4- 040320 360 0.1+ 0.3- 121112 G96 0.4- 0.2- 040318 703 (0.3- 2.0-) 040320 213 0.6- 1.5- 121112 G96 0.4- 0.0 040318 644 0.3+ 0.1+ 040326 360 0.1- 0.2+ 121113 G96 0.1- 0.3- 040318 246 0.3+ 0.4- 040326 372 0.6- 0.1- 121113 G96 0.2+ 0.2- 040318 246 0.6+ 0.4- 040326 360 0.5- 0.5- 121113 G96 0.2+ 0.3- 040318 246 0.3+ 0.1+ 040326 360 0.0 0.2- 121113 G96 0.1+ 0.2- 040318 J87 0.3+ 0.8+ 040408 360 0.3- 0.0 ( ) -------- Rejected Obs.

Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2012 Nov. 14

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