OAA computing section circular NK 1538 C/2007 F1 (LONEOS)

The following improved orbital elements, by S. Nakano, are from 126 observations 2007 Mar. 19 to Sept. 20. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.78 arc second. See an orbit on YC 2549. Epoch = 2007 Oct. 27.0 TT T = 2007 Oct. 28.75880 +/- 0.00221 (m.e.) TT Peri. = 153.71203 +/- 0.00044 Node = 172.88817 +/- 0.00007 (2000.0) Inc. = 116.08403 +/- 0.00024 q = 0.4023680 +/- 0.0000063 AU e = 1.0000838 +/- 0.0000086 1/a = -0.0002084 +/- 0.0000215 1/AU origin = +0.000830 (Q= 6) future = -0.000033 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2007/ 070324 152 1.8+ 0.3+ 070413 246 0.8+ 1.2+ 070319 699 0.0 0.4- 070325 585 1.8- 1.3- 070415 246 0.5- 0.9+ 070319 699 0.5- 0.2- 070325 585 0.2+ 1.3- 070415 246 0.3+ 0.7+ 070319 699 0.6+ 0.8- 070325 585 (2.5- 1.5-) 070415 246 0.0 0.6+ 070319 699 (0.6+ 4.0-) 070325 372 0.4- 0.7+ 070415 246 0.1- 0.2- 070319 673 0.5- 0.2+ 070325 372 0.2+ 0.4+ 070415 246 0.4+ 0.2+ 070319 673 1.1+ 1.3- 070405 585 0.5+ 0.4+ 070415 246 0.3+ 0.2- 070319 673 0.7+ 0.1- 070405 585 0.8- 0.5- 070415 246 0.6- 1.3- 070319 673 1.1+ 0.3- 070405 585 (2.5+ 0.6-) 070416 A32 (7.1+ 5.6-) 070319 474 0.6+ 1.4- 070405 585 0.7+ 1.7- 070419 215 0.1- 0.6- 070319 474 1.2+ 0.4- 070407 673 0.4- 0.1- 070420 850 (5.7+ 3.4+) 070319 474 (1.4+ 6.2-) 070407 673 0.3+ 0.2+ 070420 850 1.7+ 1.6- 070320 651 0.1- 1.0+ 070407 673 0.3- 0.5+ 070421 224 (0.2+ 2.2+) 070320 651 0.4+ 1.5+ 070407 673 0.1+ 0.9- 070421 224 0.4+ 1.3+ 070320 H55 0.3+ 0.4+ 070408 850 (4.0+ 6.8+) 070421 224 0.8- 1.0- 070320 H55 0.8- 0.6+ 070408 850 (4.6+ 7.1+) 070422 850 0.0 0.4+ 070320 H55 0.4- 0.2+ 070408 673 0.3- 0.2+ 070422 850 (0.9+ 2.2-) 070320 673 0.0 0.3+ 070408 673 0.2- 0.1- 070429 585 (2.7- 0.0 ) 070320 673 0.4+ 0.2+ 070408 850 0.7+ 0.2- 070429 585 0.1- 1.1- 070320 673 0.9+ 0.5+ 070408 673 0.3+ 0.7+ 070429 585 (2.0- 0.8-) 070320 673 0.0 0.4+ 070408 673 0.6+ 0.8+ 070430 A33 0.3+ 0.1+ 070320 235 0.5- 0.1- 070408 850 1.3+ 1.0- 070504 349 (3.0+ 0.9-) 070320 473 0.4+ 0.5+ 070408 673 0.9+ 0.9+ 070504 349 (2.5+ 1.5-) 070320 473 0.7+ 0.8- 070408 850 (0.0 2.1-) 070508 J70 (1.0+ 3.0+) 070321 J95 0.6- 0.5- 070408 673 0.9+ 0.9+ 070508 J70 (1.5+ 3.0+) 070321 J95 0.3- 0.9- 070408 850 (0.2+ 2.0-) 070510 473 (4.0+ 1.9-) 070321 J95 1.9- 0.1+ 070408 850 (2.2+ 0.5-) 070510 473 (2.5+ 2.2-) 070321 850 0.4+ 0.4- 070408 246 1.1+ 1.1+ 070510 473 0.9- 0.3+ 070321 850 0.1+ 0.3+ 070408 246 0.5+ 0.5+ 070511 104 0.9- 0.1+ 070321 658 0.5- 1.2+ 070408 246 0.5- 0.6+ 070511 104 0.8- 0.1- 070321 658 1.1- 0.0 070408 246 0.6- 0.3+ 070511 104 1.0- 1.2+ 070321 658 0.0 0.8+ 070408 246 0.1- 1.7+ 070511 104 0.9- 0.2+ 070321 850 0.6- 0.9- 070408 246 (0.7- 2.2+) 070511 104 0.2+ 0.1+ 070321 J95 0.6- 0.2- 070408 246 0.4- 0.8+ 070511 J70 (3.1+ 2.5-) 070321 J95 0.6- 0.4- 070408 473 1.2+ 1.1+ 070511 J70 (3.8+ 2.1-) 070322 300 0.5- 0.1+ 070408 473 (1.4+ 2.0+) 070511 J70 (3.7+ 2.6-) 070322 300 0.5- 1.0+ 070410 246 1.7- 0.6- 070512 213 0.7+ 0.1- 070322 300 0.6+ 0.4+ 070410 246 1.8- 0.2+ 070512 213 0.9+ 0.2- 070322 213 0.4- 0.7+ 070410 246 1.2- 0.2- 070514 585 0.0 0.6+ 070322 213 0.3- 0.7+ 070410 246 (2.1- 0.8+) 070514 585 1.6- 1.7- 070322 213 0.6- 0.5+ 070410 246 1.4- 0.4+ 070514 585 1.6+ 0.3- 070322 213 0.6- 0.4+ 070410 246 1.0- 0.5- 070518 147 0.8+ 0.0 070322 213 1.2- 0.3+ 070411 A32 (0.9- 3.3-) 070518 147 (0.6+ 2.0-) 070322 J70 (8.2- 5.5-) 070411 215 (2.4+ 4.7+) 070519 215 1.5- 0.4- 070322 J70 (5.7- 6.2-) 070411 A32 (0.6- 3.5-) 070527 J70 (6.3- 4.0-) 070323 850 0.5- 1.2- 070412 561 0.6- 0.1+ 070527 J70 (4.5- 0.6-) 070323 850 0.1+ 1.7- 070412 561 1.8+ 0.3- 070607 215 0.6- 0.8- 070323 850 0.8+ 0.1+ 070412 561 (4.4+ 2.0-) 070707 204 0.5+ 0.8+ 070323 152 1.5- 0.0 070412 A32 0.5- 1.0+ 070707 204 0.3+ 0.2- 070323 152 0.3- 1.1- 070412 A32 0.4+ 0.5- 070919 349 1.1+ 0.7- 070323 152 0.1+ 0.9- 070413 246 0.4+ 1.1- 070919 349 0.4+ 0.1+ 070323 152 (1.6+ 3.7-) 070413 246 1.1+ 0.6- 070919 349 0.0 0.1- 070324 152 0.8- 0.9+ 070413 246 1.3+ 0.0 070920 349 0.3- 0.3+ 070324 152 1.6+ 1.8- 070413 246 1.2+ 0.3- 070920 349 0.5- 0.2+ 070324 152 (1.1+ 2.7+) 070413 246 1.2+ 0.7+ 070920 349 0.8- 0.1+ ( ) -------- Rejected Obs. End of 2007/ R. A. (2000) Decl. Delta r Daily motion Elong. Phase m1 PA/Tail Nautical Twilight 10h TT h m o , AU AU , o o o o o ho A o Sept.25 11 50.70 +28 02.8 1.643 0.908 38.0/ 93 29.0 32.4 8.7 352/3.39 +7.9 119.0 26 11 53.56 +28 00.4 1.613 0.889 39.4/ 94 29.4 33.7 8.5 351/3.56 +7.9 118.9 27 11 56.53 +27 57.6 1.583 0.869 41.0/ 94 29.8 34.9 8.4 351/3.75 +8.0 118.8 28 11 59.61 +27 54.3 1.552 0.850 42.7/ 95 30.1 36.3 8.3 351/3.95 +8.0 118.7 29 12 02.82 +27 50.3 1.521 0.831 44.6/ 96 30.5 37.7 8.1 351/4.16 +8.1 118.5 30 12 06.16 +27 45.6 1.490 0.812 46.6/ 97 30.8 39.1 8.0 351/4.39 +8.2 118.4 Oct. 1 12 09.64 +27 40.1 1.459 0.793 48.7/ 97 31.1 40.7 7.8 351/4.63 +8.4 118.1 2 12 13.27 +27 33.6 1.427 0.774 51.1/ 98 31.3 42.3 7.7 351/4.89 +8.5 117.9 3 12 17.07 +27 26.0 1.395 0.754 53.7/ 99 31.6 44.0 7.5 351/5.16 +8.6 117.6 4 12 21.05 +27 17.1 1.362 0.735 56.5/100 31.8 45.8 7.3 351/5.46 +8.8 117.3 5 12 25.21 +27 06.8 1.329 0.716 59.7/101 32.0 47.8 7.2 352/5.78 +9.0 117.0 6 12 29.59 +26 54.6 1.296 0.697 63.1/103 32.2 49.8 7.0 352/6.12 +9.2 116.6 7 12 34.18 +26 40.5 1.263 0.678 66.9/104 32.3 51.9 6.8 352/6.48 +9.5 116.1 8 12 39.01 +26 24.1 1.230 0.660 71.0/105 32.4 54.2 6.6 353/6.87 +9.7 115.6 9 12 44.09 +26 04.9 1.196 0.641 75.6/107 32.4 56.6 6.5 354/7.29 +10.0 115.0 10 12 49.45 +25 42.6 1.162 0.622 80.8/108 32.4 59.2 6.3 355/7.73 +10.3 114.3 11 12 55.10 +25 16.7 1.129 0.604 86.5/110 32.3 61.9 6.1 355/8.21 +10.6 113.6 12 13 01.06 +24 46.5 1.095 0.586 92.8/112 32.1 64.8 5.9 356/8.72 +11.0 112.7 13 13 07.35 +24 11.5 1.061 0.569 99.8/114 31.9 67.9 5.7 358/9.26 +11.3 111.7 14 13 14.00 +23 30.8 1.028 0.551 107.7/116 31.6 71.2 5.5 359/9.83 +11.7 110.6 15 13 21.01 +22 43.6 0.995 0.535 116.3/118 31.1 74.7 5.3 1/10.4 +12.1 109.4 16 13 28.41 +21 48.9 0.962 0.518 125.9/120 30.6 78.4 5.1 2/11.1 +12.5 108.0 17 13 36.20 +20 45.7 0.931 0.503 136.4/122 30.0 82.3 4.9 4/11.7 +12.9 106.4 18 13 44.39 +19 32.8 0.900 0.488 147.8/124 29.2 86.4 4.7 7/12.3 +13.3 104.7 19 13 52.96 +18 09.1 0.870 0.474 160.0/126 28.4 90.7 4.5 10/13.0 +13.7 102.7 20 14 01.92 +16 33.3 0.842 0.460 173.0/129 27.4 95.2 4.3 13/13.6 +14.1 100.5 21 14 11.23 +14 44.4 0.816 0.448 186.3/131 26.3 99.8 4.1 16/14.2 +14.4 98.0 22 14 20.84 +12 41.6 0.792 0.437 199.6/133 25.2 104.4 3.9 20/14.6 +14.7 95.3 23 14 30.71 +10 24.5 0.770 0.427 212.3/135 24.0 109.0 3.7 25/15.0 +14.8 92.3 24 14 40.76 +07 53.1 0.752 0.419 223.7/137 22.8 113.2 3.6 31/15.3 +14.9 89.1 25 14 50.90 +05 08.1 0.737 0.412 233.1/139 21.7 117.0 3.5 38/15.4 +14.8 85.7 26 15 01.03 +02 11.2 0.726 0.407 239.6/141 20.8 120.0 3.4 45/15.5 +14.5 82.2 27 15 11.06 -00 55.3 0.718 0.404 242.9/143 20.1 122.1 3.3 54/15.5 +14.1 78.5 28 15 20.89 -04 08.5 0.715 0.402 242.3/144 19.9 123.0 3.3 62/15.5 +13.5 74.8 29 15 30.40 -07 24.9 0.717 0.403 238.1/146 20.0 122.6 3.3 71/15.5 +12.8 71.1 30 15 39.54 -10 40.9 0.722 0.405 230.5/147 20.5 120.9 3.4 79/15.5 +11.9 67.5 31 15 48.21 -13 53.1 0.732 0.409 220.1/148 21.3 118.2 3.4 87/15.5 +10.9 64.1 Nov. 1 15 56.39 -16 58.8 0.745 0.414 207.7/149 22.3 114.7 3.5 94/15.4 +9.7 60.9 2 16 04.04 -19 55.6 0.762 0.422 194.0/149 23.4 110.7 3.7 99/15.2 +8.6 57.9 3 16 11.16 -22 42.2 0.781 0.430 179.7/150 24.6 106.3 3.8 104/14.8 +7.4 55.2 4 16 17.74 -25 17.6 0.803 0.440 165.5/151 25.8 101.8 4.0 108/14.4 +6.2 52.8 5 16 23.82 -27 41.6 0.827 0.452 151.8/151 26.9 97.3 4.1 111/13.9 +5.0 50.6 Long/Lati 135 35.5 Beginning of 2007/ R. A. (2000) Decl. Delta r Daily motion Elong. Phase m1 PA/Tail Nautical Twilight 20h TT h m o , AU AU , o o o o o ho A o Sept.25 11 51.88 +28 01.8 1.630 0.900 38.6/ 94 29.2 32.9 8.6 352/3.46 +13.9 245.3 26 11 54.78 +27 59.3 1.600 0.881 40.1/ 94 29.6 34.2 8.5 351/3.64 +14.2 245.5 27 11 57.80 +27 56.3 1.570 0.861 41.7/ 95 29.9 35.5 8.3 351/3.83 +14.5 245.8 28 12 00.93 +27 52.7 1.540 0.842 43.5/ 95 30.3 36.8 8.2 351/4.04 +14.7 246.0 29 12 04.19 +27 48.5 1.509 0.823 45.4/ 96 30.6 38.3 8.0 351/4.25 +15.0 246.3 30 12 07.59 +27 43.4 1.477 0.804 47.4/ 97 30.9 39.8 7.9 351/4.49 +15.2 246.5 Oct. 1 12 11.13 +27 37.5 1.445 0.785 49.7/ 98 31.2 41.4 7.7 351/4.73 +15.3 246.7 2 12 14.84 +27 30.6 1.413 0.766 52.2/ 99 31.5 43.0 7.6 351/5.00 +15.5 247.0 3 12 18.71 +27 22.5 1.381 0.746 54.9/100 31.7 44.8 7.4 351/5.28 +15.5 247.2 4 12 22.76 +27 13.0 1.349 0.727 57.8/101 31.9 46.6 7.3 351/5.59 +15.6 247.4 5 12 27.01 +27 01.9 1.316 0.708 61.0/102 32.1 48.6 7.1 352/5.91 +15.6 247.6 6 12 31.47 +26 49.0 1.283 0.689 64.6/103 32.2 50.7 6.9 352/6.26 +15.5 247.8 7 12 36.16 +26 34.0 1.249 0.670 68.5/105 32.3 52.9 6.7 353/6.64 +15.4 248.1 8 12 41.09 +26 16.4 1.216 0.652 72.9/106 32.4 55.2 6.6 353/7.04 +15.2 248.3 9 12 46.29 +25 56.0 1.182 0.633 77.7/107 32.4 57.7 6.4 354/7.47 +14.9 248.5 10 12 51.76 +25 32.3 1.148 0.615 83.1/109 32.3 60.3 6.2 355/7.93 +14.6 248.8 11 12 57.54 +25 04.7 1.114 0.597 89.0/111 32.2 63.1 6.0 356/8.42 +14.1 249.1 12 13 03.64 +24 32.6 1.081 0.579 95.6/113 32.0 66.1 5.8 357/8.94 +13.6 249.4 13 13 10.08 +23 55.3 1.047 0.561 103.0/115 31.8 69.3 5.6 358/9.50 +12.9 249.7 14 13 16.88 +23 12.0 1.014 0.544 111.2/116 31.4 72.6 5.4 360/10.1 +12.1 250.0 15 13 24.05 +22 21.8 0.981 0.528 120.2/119 30.9 76.2 5.2 1/10.7 +11.2 250.4 16 13 31.61 +21 23.7 0.949 0.512 130.1/121 30.4 80.0 5.0 3/11.3 +10.1 250.9 17 13 39.56 +20 16.6 0.918 0.496 141.0/123 29.7 84.0 4.8 5/12.0 +8.9 251.4 18 13 47.91 +18 59.3 0.887 0.482 152.8/125 28.9 88.2 4.6 8/12.6 +7.5 252.0 19 13 56.65 +17 30.7 0.858 0.468 165.4/127 28.0 92.6 4.4 11/13.2 +5.8 252.6 20 14 05.76 +15 49.6 0.831 0.455 178.5/130 27.0 97.1 4.2 14/13.8 +4.0 253.4 21 14 15.20 +13 55.0 0.805 0.443 191.9/132 25.9 101.8 4.0 18/14.4 +2.0 254.3 22 14 24.93 +11 46.2 0.782 0.433 205.0/134 24.7 106.3 3.8 22/14.8 -0.3 255.3 23 14 34.88 +09 23.1 0.762 0.424 217.2/136 23.5 110.8 3.7 28/15.1 -2.7 256.5 24 14 44.98 +06 45.9 0.745 0.416 227.9/138 22.3 114.9 3.6 34/15.4 -5.3 257.8 25 14 55.13 +03 55.7 0.732 0.410 236.2/140 21.3 118.4 3.5 41/15.5 -8.1 259.3 26 15 05.23 +00 54.5 0.722 0.406 241.4/142 20.5 121.0 3.4 49/15.5 -10.9 260.9 27 15 15.19 -02 15.2 0.717 0.403 243.1/143 20.0 122.6 3.3 57/15.5 -13.8 262.8 28 15 24.89 -05 30.2 0.715 0.402 241.0/145 19.9 123.0 3.3 66/15.5 -16.7 264.8 29 15 34.26 -08 46.8 0.719 0.403 235.3/146 20.1 122.0 3.3 75/15.5 -19.5 266.9 30 15 43.21 -12 01.6 0.726 0.406 226.5/147 20.8 119.9 3.4 83/15.5 -22.2 269.2 31 15 51.68 -15 11.4 0.737 0.411 215.1/148 21.7 116.9 3.5 90/15.4 -24.7 271.5 Nov. 1 15 59.64 -18 13.7 0.752 0.417 202.1/149 22.7 113.1 3.6 96/15.3 -26.9 274.0 2 16 07.07 -21 06.3 0.769 0.425 188.1/150 23.9 108.9 3.7 101/15.0 -28.9 276.4 3 16 13.96 -23 48.3 0.790 0.434 173.8/150 25.1 104.4 3.9 106/14.7 -30.6 278.9 4 16 20.33 -26 19.0 0.813 0.445 159.7/151 26.2 99.9 4.0 109/14.2 -32.1 281.3 5 16 26.20 -28 38.3 0.838 0.457 146.3/152 27.3 95.4 4.2 113/13.7 -33.3 283.6 m1 = 8.0 + 5 log Delta + 10.0 log r Long/Lati 135 35.5

Director, Computing Section Syuichi Nakano 2007 Sept. 23

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