Nakano Note (Nakano wa Kangaeru noda) NK 2355 271P/van Houten-Lemmon (1960 S1 = 2012 TB36)

The following improved orbital elements, by S. Nakano, are from 28 observations 1960 to 2012. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.35 arc second. Comet has passed 0.63 AU from Jupiter on 1979 March 11 UT. Identitication was found by M. Meyer who gives the predicted T = 2012 Aug. 9. See an orbit and the prediction in NK 165, NK 216 and HICQ 2010/2011 (Predicted T = 2011 Apr. 23). Epoch = 2013 July 7.0 TT T = 2013 July 6.09838 +/- 0.11751 (m.e.) TT Peri. = 35.16286 +/- 0.01237 Node = 9.58390 +/- 0.00010 (2000.0) Inc. = 6.85705 +/- 0.00135 q = 4.2498803 +/- 0.0001560 AU e = 0.3912797 +/- 0.0000218 a = 6.9816633 +/- 0.0000513 AU n' = 0.05342761 +/- 0.00000059 P = 18.448 +/- 0.0002033 years (+/- 0.07 day) T = 1961 May 3.00676 TT Epoch = 1961 May 21.0 TT Peri. = 15.51307 e = 0.3755192 Node = 23.67154 (2000.0) a = 6.3001917 AU Inc. = 6.62420 n'= 0.06232660 q = 3.9343488 AU P = 15.814 years [ T = 1977 Mar. 14.66909 TT Epoch = 1977 Feb. 26.0 TT Peri. = 14.94678 e = 0.3816724 Node = 23.36052 (2000.0) a = 6.4032508 AU Inc. = 6.57457 n'= 0.06082797 q = 3.9593065 AU P = 16.203 years ] [ T = 1995 Apr. 28.46473 TT Epoch = 1995 May 3.0 TT Peri. = 35.29778 e = 0.3882646 Node = 9.85715 (2000.0) a = 6.8932137 AU Inc. = 6.88745 n'= 0.05445922 q = 4.2168232 AU P = 18.098 years ] The predicted orbit for the 2032 return is as follows: T = 2032 Mar. 22.89151 TT Epoch = 2032 Mar. 29.0 TT Peri. = 36.31654 e = 0.3956686 Node = 9.18298 (2000.0) a = 7.0673727 AU Inc. = 6.86004 n'= 0.05245865 q = 4.2710350 AU P = 18.788 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1960/ 120917 G96 0.4- 0.3+ 121009 F51 0.1+ 0.0 600924 675 0.6+ 0.1+ 120917 G96 0.3+ 0.3+ 121009 F51 0.0 0.1+ 600926 675 0.3+ 1.0- 120917 G96 1.2- 0.1- 121014 G96 0.2+ 0.1- 600927 675 0.2+ 0.1+ 120917 G96 0.1+ 0.3+ 121014 G96 0.6- 0.4- 600928 675 0.1- 0.1+ 121005 G96 0.1+ 0.3- 121014 G96 0.4- 0.2- 601017 675 0.5- 0.8+ 121005 G96 0.0 0.1- 121014 G96 0.7- 0.2- 601022 675 1.3- 0.3+ 121005 G96 0.1- 0.2+ 121014 G96 0.5- 0.5- 601025 675 0.9+ 0.9- 121005 G96 0.0 0.3- 121014 G96 0.2- 0.1+ 601026 675 0.0 0.5+ 121009 F51 0.1+ 0.0 121014 G96 0.1- 0.4- 2012/ 121009 F51 0.1+ 0.1+ 121014 G96 0.3- 0.3+ ( ) -------- Rejected Obs.

Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2012 Nov. 5

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