Nakano Note (Nakano wa Kangaeru noda) NK 2359 C/2012 F6 (Lemmon)
The following improved orbital elements, by S. Nakano, are from 66 observations 2012 Mar. 23 to Nov. 4. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.48 arc second. The comet will pass 0.98 AU from the Earth on 2013 Feb. 5 UT. The comet will be mag.= 7 around the next spring as follows. Epoch = 2013 Mar. 9.0 TT T = 2013 Mar. 24.51514 +/- 0.00234 (m.e.) TT Peri. = 304.98571 +/- 0.00089 Node = 332.71472 +/- 0.00006 (2000.0) Inc. = 82.60674 +/- 0.00038 q = 0.7312735 +/- 0.0000136 AU e = 0.9985497 +/- 0.0000116 1/a = +0.0019833 +/- 0.0000158 1/AU origin = +0.002139 (Q= 6) future = +0.002437 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2012/ 120325 H21 0.5- 0.2- 120517 215 0.9- 0.6- 120323 G96 0.9- 0.3+ 120325 H21 0.0 0.4- 120517 215 0.2+ 1.2- 120323 G96 0.0 0.0 120325 H21 0.2- 0.1- 120610 H06 0.2- 0.1+ 120323 G96 0.7- 0.0 120325 H06 (3.8+ 1.8+) 120610 H06 0.1+ 0.4+ 120323 G96 0.3- 0.3+ 120325 H06 (2.0+ 2.0+) 120614 H06 0.1+ 0.2- 120323 H01 0.2- 0.2+ 120328 D03 0.4- 0.3+ 120614 H06 0.0 0.3- 120323 H01 0.1- 0.3+ 120328 D03 0.6- 0.3+ 120614 H06 0.0 0.6- 120323 H01 0.2- 0.2+ 120328 D03 0.1+ 0.0 121014 H06 0.4+ 0.1+ 120323 H01 0.2- 0.2+ 120328 D03 0.1- 0.1- 121014 H06 0.3+ 0.0 120323 033 0.6- 0.0 120329 H06 0.5+ 0.7+ 121014 H06 0.4+ 0.1- 120323 J95 0.4+ 0.0 120329 H06 0.1- 0.7+ 121019 D81 (5.5- 1.0+) 120323 033 1.2+ 0.5+ 120329 H06 0.4- 0.5+ 121019 D81 (6.3- 3.6-) 120323 J95 0.1+ 0.3+ 120329 D03 0.5+ 0.8- 121019 367 0.2+ 0.1- 120324 H01 0.1- 0.0 120329 D03 0.7+ 0.7- 121019 367 0.2- 0.2- 120324 H01 0.3- 0.0 120329 D03 0.4+ 0.6- 121019 367 0.3- 0.0 120324 H01 0.3- 0.1- 120329 D03 1.0+ 0.2- 121024 372 1.2- 0.3+ 120324 H01 0.2- 0.1+ 120329 D03 0.5+ 0.2- 121024 372 0.6- 1.1+ 120324 H36 0.2- 0.2- 120410 H06 0.6+ 0.1+ 121025 367 0.0 0.0 120324 H36 0.4+ 0.5- 120410 H06 1.0+ 0.4+ 121025 367 0.0 0.1+ 120324 204 0.4- 0.7+ 120410 H06 1.8+ 0.7+ 121025 367 0.1+ 0.1+ 120324 204 0.0 0.2+ 120516 H06 0.1- 0.2+ 121104 D95 0.1+ 0.1+ 120324 J95 0.2+ 0.5- 120516 H06 0.1- 0.4+ 121104 D95 1.2+ 0.6- 120325 J95 0.4- 0.7- 120516 H06 0.0 0.3+ 121104 D95 0.3- 0.2- 120325 J95 0.2- 0.1- 120517 215 1.2- 0.5- ( ) -------- Rejected Obs. 2013/ R. A.(2000) Decl. Delta r Daily motion Elong. Phase Mag. 0h TT h m o , AU AU , o o o m1 Jan. 13 12 21.27 -50 19.7 1.207 1.490 86.5/173 85.1 41.1 10.1 18 12 28.11 -57 27.8 1.125 1.419 96.4/173 84.2 43.6 9.8 23 12 37.79 -65 25.0 1.061 1.348 105.0/172 82.4 46.4 9.4 28 12 55.57 -74 02.1 1.015 1.277 110.7/169 79.4 49.3 9.1 Feb. 2 13 53.43 -82 51.7 0.990 1.207 112.3/155 75.4 52.2 8.8 7 21 12.35 -85 53.3 0.986 1.138 109.7/ 47 70.5 54.8 8.5 12 23 23.26 -77 40.3 1.002 1.071 103.6/ 14 65.2 56.7 8.3 17 23 47.56 -69 12.4 1.036 1.006 95.5/ 9 59.6 57.9 8.1 22 23 57.61 -61 18.8 1.084 0.945 87.1/ 6 54.0 57.9 7.9 27 00 02.97 -54 05.5 1.141 0.888 79.2/ 5 48.6 56.8 7.8 Mar. 4 00 06.10 -47 30.4 1.206 0.837 72.6/ 3 43.4 54.5 7.6 9 00 07.97 -41 27.8 1.274 0.794 67.4/ 2 38.6 51.2 7.5 14 00 09.05 -35 51.2 1.341 0.761 63.4/ 1 34.1 47.1 7.5 19 00 09.66 -30 34.3 1.406 0.740 60.5/ 1 30.2 42.5 7.4 24 00 10.03 -25 31.9 1.466 0.731 58.3/ 1 26.9 38.0 7.5 29 00 10.36 -20 40.5 1.519 0.737 56.6/ 1 24.5 34.1 7.6 Apr. 3 00 10.79 -15 57.6 1.564 0.756 55.1/ 2 23.2 31.4 7.8 8 00 11.42 -11 22.1 1.603 0.786 53.9/ 3 23.1 29.9 8.0 13 00 12.26 -06 53.2 1.634 0.827 52.7/ 3 24.1 29.7 8.2 18 00 13.30 -02 30.1 1.659 0.877 51.7/ 4 26.1 30.3 8.5 23 00 14.48 +01 47.8 1.678 0.933 50.8/ 4 28.8 31.3 8.8 28 00 15.76 +06 01.2 1.693 0.993 50.1/ 4 31.9 32.4 9.1 May 3 00 17.06 +10 10.7 1.705 1.057 49.4/ 4 35.3 33.4 9.4 8 00 18.31 +14 17.0 1.714 1.124 48.8/ 4 38.9 34.3 9.7 13 00 19.42 +18 20.4 1.722 1.193 48.3/ 3 42.6 35.0 9.9 18 00 20.29 +22 21.5 1.728 1.263 47.8/ 2 46.3 35.4 10.2
Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2012 Nov. 13