Orbital elements: C/2002 F1 (Utsunomiya) Epoch 2002 Apr. 16.0 TT = JDT 2452380.5 T 2002 Apr. 22.8982 TT Sato q 0.438305 (2000.0) P Q n 0.0000275 Peri. 125.8986 -0.0697537 -0.3520241 z +0.000919 Node 289.0298 +0.2288501 +0.9050662 e 0.999597 Incl. 80.8760 +0.9709593 -0.2386089 P 35900 From 136 observations 2002 Mar. 20-Apr. 28, mean residual 0".62. Residuals in seconds of arc 020320 620 1.4- 1.3- 020327 355 0.2+ 0.3+ 020401 340 0.6+ 0.2+ 020320 620 1.6- 1.2- 020327 355 0.1- 0.0 020401 340 0.4+ 0.0 020320 620 1.7- 1.0- 020327 355 0.1- 0.1- 020401 340 0.1+ 0.1- 020320 620 1.8- 1.1- 020327 355 0.1- 0.2+ 020404 349 0.2- 0.3+ 020320 620 1.8- 1.2- 020327 349 0.3+ 0.0 020404 349 0.3+ 0.6- 020320 620 1.6- 1.2- 020327 342 0.6+ 1.1+ 020404 349 0.1- 0.5- 020320 448 0.0 1.7- 020327 349 0.4+ 0.2+ 020404 349 0.5+ 0.5- 020320 448 0.8- 0.7+ 020327 372 0.1+ 0.6+ 020405 452 1.5+ 0.4- 020320 448 0.0 0.5+ 020327 342 0.9+ 0.6- 020405 452 0.1+ 0.6- 020320 448 0.5- 1.3+ 020327 300 0.1+ 0.1- 020405 452 0.2+ 0.4- 020320 448 1.1+ 0.3- 020327 300 0.1+ 0.1- 020405 349 1.2+ 0.7- 020320 448 1.0- 1.1+ 020327 300 0.1+ 0.1- 020405 349 1.3+ 0.7- 020320 897 0.5- 0.3+ 020327 349 0.5+ 0.1- 020405 349 0.9+ 0.5- 020320 349 0.0 0.1- 020327 300 0.0 0.1- 020405 349 0.9+ 0.6- 020320 349 0.0 0.1- 020327 349 0.3+ 0.2+ 020405 340 0.1- 0.3- 020320 897 0.2- 0.2+ 020327 300 0.1- 0.1+ 020405 300 0.4+ 0.5- 020320 349 0.0 0.1+ 020327 349 0.7+ 0.0 020405 300 0.9+ 0.4- 020320 897 0.3- 0.1- 020327 372 0.6+ 0.8+ 020405 340 0.7+ 0.6- 020320 300 0.1+ 0.1+ 020327 342 0.4+ 0.5+ 020405 340 0.3- 0.5- 020320 300 0.0 0.9+ 020327 372 0.8+ 0.7+ 020405 340 0.1- 0.5- 020320 300 0.5+ 0.1- 020327 372 0.4+ 0.3+ 020405 340 0.4+ 0.3- 020320 300 0.3- 0.2+ 020329 300 0.1- 0.6- 020412 349 1.0- 1.1+ 020320 349 0.1+ 0.1- 020329 300 0.3- 0.0 020412 349 0.4- 1.3+ 020320 349 0.0 0.2+ 020329 300 0.0 0.1- 020412 349 0.3- 1.0+ 020320 349 0.0 0.0 020329 300 0.3- 0.0 020412 349 0.1- 1.2+ 020320 888 0.2+ 0.2- 020329 300 0.2- 0.0 020412 349 0.6- 0.8+ 020320 888 0.1- 0.1+ 020330 340 0.5+ 0.0 020412 340 1.8- 1.1+ 020320 888 0.5+ 0.2- 020330 340 0.5+ 0.1- 020412 340 1.6- 0.5+ 020320 888 0.2+ 0.0 020330 340 1.1+ 0.5- 020412 340 (2.3- 2.0+) 020320 897 0.0 0.0 020330 340 0.9+ 0.2+ 020412 340 0.2- 1.4+ 020321 204 0.2+ 0.3+ 020330 340 0.0 0.9- 020412 340 (1.6- 2.9+) 020321 204 0.3+ 0.3+ 020330 340 0.9+ 0.0 020412 352 (0.1- 2.4+) 020321 204 0.2+ 0.6+ 020331 213 0.8+ 1.8+ 020412 352 (0.7+ 2.6+) 020321 926 1.2- 0.6+ 020331 300 1.3- 0.3+ 020413 349 0.9- 0.3+ 020321 926 0.9+ 0.2- 020331 300 1.1- 0.1- 020413 349 0.9- 0.7+ 020323 170 0.1+ 0.4- 020331 300 1.4- 0.1- 020413 349 0.6- 0.6+ 020323 445 0.7+ 1.0+ 020331 300 0.6- 0.2- 020413 349 1.0- 0.5+ 020323 445 (2.3- 0.1-) 020331 300 1.6- 0.1+ 020413 349 0.7- 0.6+ 020323 445 (5.2+ 2.4-) 020401 349 0.2+ 0.3- 020413 367 0.1+ 0.4- 020324 349 0.1- 0.8+ 020401 349 0.6+ 0.4- 020413 367 0.5+ 0.4- 020324 349 0.2+ 0.0 020401 349 0.5+ 0.1- 020413 367 0.2- 0.3- 020324 349 0.2- 0.4+ 020401 349 0.3+ 0.2- 020413 367 0.6+ 0.5- 020324 349 0.4- 0.2+ 020401 349 0.5+ 0.3- 020428 349 0.6+ 0.2- 020325 367 0.4+ 0.1+ 020401 340 0.3+ 0.2- 020428 349 0.2+ 0.1- 020325 367 0.3+ 0.4+ 020401 340 0.3+ 0.4- 020428 349 0.0 0.4- 020325 367 0.2+ 0.2+ 020401 340 0.5+ 0.0 020428 349 0.3+ 0.7- 020325 367 0.2+ 0.0 020401 340 0.0 0.5- 020428 349 0.6+ 0.5- 020325 367 0.2+ 0.1+ Ephemeris: Date/20h JST R.A.(2000) Decl. Delta r m1 Elong. h/A h m o ' o o o 2002 Apr. 26 03 03.04 +30 23.3 1.227 0.448 5.0 20.2 3.7/125.0 2002 Apr. 27 03 12.92 +29 38.4 1.237 0.454 5.0 20.2 4.2/123.6 2002 Apr. 28 03 22.34 +28 49.6 1.248 0.461 5.1 20.2 4.7/122.3 2002 Apr. 29 03 31.31 +27 57.6 1.260 0.470 5.2 20.3 5.0/120.9 2002 Apr. 30 03 39.82 +27 02.9 1.272 0.480 5.3 20.4 5.3/119.5 2002 May 1 03 47.89 +26 06.3 1.284 0.490 5.4 20.5 5.4/118.2 2002 May 2 03 55.54 +25 08.2 1.297 0.502 5.6 20.7 5.5/116.9 2002 May 3 04 02.80 +24 09.1 1.311 0.515 5.7 20.9 5.6/115.7 2002 May 4 04 09.67 +23 09.4 1.325 0.528 5.8 21.1 5.5/114.5 2002 May 5 04 16.19 +22 09.5 1.339 0.542 6.0 21.4 5.4/113.3 2002 May 6 04 22.38 +21 09.6 1.353 0.557 6.1 21.6 5.3/112.2 2002 May 7 04 28.27 +20 10.0 1.368 0.573 6.3 21.9 5.1/111.1 2002 May 8 04 33.87 +19 10.8 1.382 0.588 6.4 22.2 4.8/110.1 2002 May 9 04 39.22 +18 12.3 1.398 0.605 6.5 22.5 4.5/109.1 2002 May 10 04 44.32 +17 14.6 1.413 0.621 6.7 22.8 4.2/108.2 2002 May 11 04 49.20 +16 17.6 1.428 0.638 6.8 23.2 3.8/107.3 2002 May 12 04 53.87 +15 21.7 1.443 0.655 7.0 23.5 3.4/106.4 2002 May 13 04 58.36 +14 26.6 1.459 0.673 7.1 23.8 3.0/105.6 2002 May 14 05 02.67 +13 32.6 1.475 0.690 7.2 24.2 2.5/104.8 2002 May 15 05 06.82 +12 39.6 1.490 0.708 7.4 24.5 2.1/104.0 2002 May 16 05 10.82 +11 47.7 1.506 0.726 7.5 24.8 1.6/103.3 2002 May 17 05 14.69 +10 56.8 1.522 0.744 7.6 25.2 1.1/102.6 2002 May 18 05 18.42 +10 06.9 1.538 0.762 7.8 25.5 0.5/102.0 2002 May 19 05 22.04 +09 18.0 1.554 0.780 7.9 25.9 0.0/101.4 2002 May 20 05 25.55 +08 30.2 1.570 0.798 8.0 26.2 -0.5/100.8 2002 May 21 05 28.96 +07 43.3 1.585 0.817 8.1 26.5 -1.1/100.2 (Apr. 29, 2002) -- Orbital elements: C/2002 F1 (Utsunomiya) T 2002 Apr. 22.9849 TT Sato q 0.441854 (2000.0) P Q Peri. 125.5608 -0.0608573 -0.3538663 Node 288.8603 +0.2256297 +0.9059673 e 1.0 Incl. 80.4937 +0.9723105 -0.2323831 From 34 observations 2002 Mar. 20-24, mean residual 0".51. Residuals in seconds of arc 020320 620 0.1- 0.5- 020320 897 0.5- 0.2+ 020320 349 0.1+ 0.1- 020320 620 0.3- 0.5- 020320 349 0.1+ 0.1- 020320 897 0.1+ 0.1- 020320 620 0.4- 0.2- 020320 349 0.1+ 0.2- 020321 204 0.3- 0.2- 020320 620 0.5- 0.3- 020320 897 0.1- 0.1+ 020321 204 0.3- 0.2- 020320 620 0.5- 0.4- 020320 349 0.1+ 0.0 020321 204 0.3- 0.1+ 020320 620 0.3- 0.5- 020320 897 0.2- 0.2- 020321 926 (2.3- 0.2-) 020320 448 0.7+ 1.4- 020320 300 0.2+ 0.0 020321 926 0.2- 1.0- 020320 448 0.2- 1.1+ 020320 300 0.1+ 0.8+ 020324 349 0.0 0.5+ 020320 448 0.7+ 0.8+ 020320 300 0.5+ 0.2- 020324 349 0.3+ 0.3- 020320 448 0.2+ 1.6+ 020320 300 0.3- 0.2+ 020324 349 0.1- 0.1+ 020320 448 1.8+ 0.0 020320 349 0.2+ 0.2- 020324 349 0.3- 0.2- 020320 448 0.4- 1.4+ 020320 349 0.1+ 0.1+ Ephemeris: Date/ 4h JST R.A.(2000) Decl. Delta r m1 Elong. P h/A h m o ' o o o o 2002 Mar. 22 21 54.10 +07 19.3 1.556 0.902 9.5 33.0 37.0 4.8/264.4 2002 Mar. 23 21 58.17 +08 12.0 1.534 0.884 9.4 33.0 37.9 5.3/263.7 2002 Mar. 24 22 02.40 +09 06.0 1.512 0.866 9.3 32.9 38.7 5.7/262.9 2002 Mar. 25 22 06.78 +10 01.4 1.490 0.847 9.1 32.8 39.6 6.2/262.0 2002 Mar. 26 22 11.34 +10 58.1 1.469 0.829 9.0 32.7 40.6 6.6/261.2 2002 Mar. 27 22 16.08 +11 56.2 1.448 0.811 8.9 32.6 41.5 7.0/260.3 2002 Mar. 28 22 21.01 +12 55.5 1.428 0.793 8.8 32.4 42.4 7.3/259.3 2002 Mar. 29 22 26.15 +13 56.0 1.408 0.774 8.6 32.2 43.4 7.6/258.3 2002 Mar. 30 22 31.51 +14 57.7 1.388 0.756 8.5 31.9 44.3 7.9/257.2 2002 Mar. 31 22 37.11 +16 00.5 1.370 0.738 8.4 31.7 45.3 8.2/256.1 2002 Apr. 1 22 42.96 +17 04.2 1.351 0.720 8.2 31.4 46.2 8.4/255.0 2002 Apr. 2 22 49.08 +18 08.7 1.334 0.703 8.1 31.0 47.2 8.6/253.8 2002 Apr. 3 22 55.49 +19 13.9 1.317 0.685 8.0 30.7 48.1 8.7/252.6 2002 Apr. 4 23 02.20 +20 19.4 1.301 0.668 7.8 30.3 49.1 8.8/251.3 2002 Apr. 5 23 09.24 +21 25.2 1.286 0.650 7.7 29.9 50.0 8.8/249.9 2002 Apr. 6 23 16.61 +22 30.8 1.271 0.633 7.5 29.4 50.9 8.8/248.6 2002 Apr. 7 23 24.34 +23 35.9 1.258 0.617 7.4 28.9 51.7 8.7/247.2 2002 Apr. 8 23 32.45 +24 40.2 1.245 0.600 7.3 28.4 52.6 8.5/245.7 2002 Apr. 9 23 40.94 +25 43.2 1.234 0.585 7.1 27.9 53.3 8.2/244.3 2002 Apr. 10 23 49.83 +26 44.5 1.224 0.569 7.0 27.4 54.1 7.9/242.8 2002 Apr. 11 23 59.12 +27 43.4 1.214 0.554 6.9 26.8 54.7 7.5/241.3 2002 Apr. 12 00 08.82 +28 39.5 1.206 0.540 6.7 26.3 55.3 7.1/239.8 2002 Apr. 13 00 18.91 +29 32.1 1.199 0.526 6.6 25.7 55.8 6.5/238.3 2002 Apr. 14 00 29.39 +30 20.6 1.193 0.513 6.5 25.1 56.2 5.9/236.7 2002 Apr. 15 00 40.24 +31 04.3 1.189 0.501 6.4 24.6 56.5 5.1/235.3 2002 Apr. 16 00 51.41 +31 42.7 1.186 0.489 6.3 24.0 56.6 4.3/233.8 2002 Apr. 17 01 02.87 +32 15.1 1.184 0.479 6.2 23.5 56.7 3.4/232.3 2002 Apr. 18 01 14.57 +32 41.1 1.183 0.470 6.1 23.0 56.6 2.5/231.0 2002 Apr. 19 01 26.44 +33 00.2 1.184 0.462 6.0 22.5 56.4 1.4/229.6 2002 Apr. 20 01 38.40 +33 12.0 1.185 0.455 5.9 22.1 56.0 0.3/228.3 Date/20h JST R.A.(2000) Decl. Delta r m1 Elong. P h/A h m o ' o o o o 2002 Apr. 20 01 46.39 +33 15.8 1.187 0.451 5.9 21.8 55.7 -2.7/134.7 2002 Apr. 21 01 58.34 +33 15.2 1.191 0.447 5.9 21.4 55.1 -1.5/133.5 2002 Apr. 22 02 10.18 +33 07.2 1.196 0.444 5.9 21.0 54.5 -0.4/132.3 2002 Apr. 23 02 21.83 +32 52.0 1.202 0.442 5.9 20.7 53.7 0.6/131.0 2002 Apr. 24 02 33.21 +32 29.9 1.209 0.442 5.9 20.5 52.8 1.5/129.7 2002 Apr. 25 02 44.28 +32 01.4 1.217 0.443 5.9 20.3 51.9 2.3/128.3 2002 Apr. 26 02 54.97 +31 27.1 1.226 0.446 5.9 20.2 51.0 3.0/126.9 2002 Apr. 27 03 05.25 +30 47.6 1.235 0.451 6.0 20.1 50.0 3.6/125.6 2002 Apr. 28 03 15.10 +30 03.5 1.246 0.457 6.1 20.0 49.0 4.2/124.2 2002 Apr. 29 03 24.50 +29 15.5 1.257 0.464 6.2 20.0 48.0 4.6/122.8 2002 Apr. 30 03 33.45 +28 24.3 1.268 0.472 6.3 20.0 47.0 5.0/121.5 2002 May 1 03 41.95 +27 30.5 1.281 0.482 6.4 20.1 46.0 5.2/120.2 2002 May 2 03 50.02 +26 34.7 1.293 0.492 6.5 20.2 45.1 5.4/118.9 2002 May 3 03 57.68 +25 37.4 1.306 0.504 6.6 20.4 44.2 5.5/117.6 2002 May 4 04 04.94 +24 39.0 1.320 0.516 6.7 20.6 43.3 5.5/116.3 2002 May 5 04 11.82 +23 40.0 1.334 0.530 6.9 20.8 42.5 5.5/115.2 2002 May 6 04 18.35 +22 40.6 1.348 0.543 7.0 21.0 41.7 5.4/114.0 2002 May 7 04 24.56 +21 41.3 1.362 0.558 7.1 21.2 40.9 5.2/112.9 2002 May 8 04 30.46 +20 42.2 1.377 0.573 7.3 21.5 40.2 5.0/111.8 2002 May 9 04 36.08 +19 43.5 1.392 0.589 7.4 21.8 39.5 4.8/110.8 2002 May 10 04 41.44 +18 45.4 1.407 0.605 7.6 22.1 38.9 4.5/109.8 (Mar. 25, 2002) -- Orbital elements: C/2002 F1 (Utsunomiya) T 2002 Apr. 23.459 TT Sato q 0.45850 (2000.0) P Q Peri. 124.097 -0.022020 -0.361631 Node 288.168 +0.211562 +0.909489 e 1.0 Incl. 78.804 +0.977116 -0.205069 From 31 observations 2002 Mar. 20-21, mean residual 0".51. (Mar. 22, 2002) -- Comet C/2002 F1 The following preliminary parabolic orbital elements by Hirohisa Sato. From 18 observations 2002 Mar. 20, mean residual 0".53. T 2002 Apr. 24.87 TT q 0.5230 AU Peri. 118.53 Node 285.90 (2000.0) Incl. 73.43 e 1.0 Date R.A.(2000) Decl. Delta r m1 Elong. P h/A 04h00m (JST) h m o ' o o o o 2002 Mar. 21 21 52.09 +07 02.0 1.609 0.939 9.8 32.6 34.9 4.2/264.4 2002 Mar. 22 21 56.12 +07 54.1 1.589 0.922 9.7 32.6 35.6 4.7/263.6 2002 Mar. 23 22 00.28 +08 47.3 1.569 0.906 9.5 32.6 36.3 5.2/262.9 2002 Mar. 24 22 04.57 +09 41.6 1.550 0.889 9.4 32.5 37.1 5.6/262.1 2002 Mar. 25 22 09.00 +10 37.1 1.531 0.873 9.3 32.4 37.8 6.1/261.2 2002 Mar. 26 22 13.58 +11 33.6 1.512 0.856 9.2 32.3 38.5 6.5/260.4 2002 Mar. 27 22 18.32 +12 31.2 1.494 0.840 9.1 32.2 39.3 6.8/259.5 2002 Mar. 28 22 23.23 +13 29.7 1.477 0.823 9.0 32.0 40.0 7.2/258.5 2002 Mar. 29 22 28.31 +14 29.2 1.460 0.807 8.9 31.9 40.7 7.5/257.5 2002 Mar. 30 22 33.58 +15 29.6 1.443 0.791 8.8 31.6 41.5 7.8/256.5 2002 Mar. 31 22 39.05 +16 30.7 1.427 0.775 8.7 31.4 42.2 8.1/255.5 (Mar. 21, 2002) --