------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 2004 2004 Jun 17 09.01UT Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke, Hants, RG22 4PP,England.Telephone/FAX(01256)471074Int:+441256471074 INTERNET: GUY@TAHQ.DEMON.CO.UK GMH at AST.STAR.RL.AC.UK WORLD WIDE WEB http://www.theastronomer.org ------------------------------------------------------------------- COMET C/2004 H6 (SWAN) Further to the discovery notes on E-Circular 2001 and observing guidance by Martin Mobberley, new elements and an ephemeris by Hurst using EPH.EXE by Nick James follow for the benefit of our worldwide observers: T 2004 May 12.6800 TT w 269.03000 ) e 1.00000000 O 317.23900 ) 2000.0 q 0.7760500 A.U. i 107.65300 ) Source: MPEC 2004-L42 Positions are geocentric m = 8.0 + 5.0 log R + 10.0 log r Date R.A. (2000) Dec. R r Elong Mag. Motion h m o ' (AU) (AU) o "/hr P.A. 2004 June 17.00 2 42.28 -13 23.8 1.111 1.026 57.5 8.3 91 271 18.00 2 39.75 -13 23.0 1.095 1.038 58.8 8.4 94 271 19.00 2 37.14 -13 22.1 1.079 1.050 60.0 8.4 96 271 20.00 2 34.45 -13 21.1 1.063 1.062 61.4 8.4 99 271 21.00 2 31.68 -13 20.0 1.047 1.074 62.7 8.4 103 272 22.00 2 28.81 -13 18.9 1.031 1.087 64.1 8.4 106 272 23.00 2 25.84 -13 17.7 1.015 1.099 65.5 8.4 110 272 24.00 2 22.76 -13 16.4 0.998 1.112 67.0 8.5 114 272 25.00 2 19.57 -13 15.1 0.982 1.125 68.5 8.5 119 272 26.00 2 16.25 -13 13.7 0.965 1.138 70.0 8.5 123 272 27.00 2 12.81 -13 12.2 0.949 1.150 71.6 8.5 128 272 28.00 2 9.22 -13 10.6 0.932 1.163 73.2 8.5 133 272 29.00 2 5.49 -13 8.9 0.916 1.176 74.8 8.5 139 272 30.00 2 1.59 -13 7.2 0.900 1.190 76.5 8.5 145 272 2004 July 1.00 1 57.53 -13 5.3 0.883 1.203 78.2 8.5 151 272 2.00 1 53.29 -13 3.3 0.867 1.216 80.0 8.5 158 272 3.00 1 48.87 -13 1.2 0.851 1.229 81.8 8.5 165 272 4.00 1 44.24 -12 58.9 0.835 1.243 83.7 8.6 173 272 5.00 1 39.40 -12 56.4 0.819 1.256 85.6 8.6 180 272 6.00 1 34.35 -12 53.7 0.804 1.269 87.6 8.6 189 272 7.00 1 29.05 -12 50.8 0.788 1.283 89.7 8.6 198 272 8.00 1 23.52 -12 47.5 0.773 1.296 91.8 8.6 207 272 9.00 1 17.73 -12 43.9 0.759 1.310 94.0 8.6 216 272 10.00 1 11.67 -12 40.0 0.745 1.324 96.2 8.6 226 273 11.00 1 5.34 -12 35.6 0.731 1.337 98.5 8.6 237 273 12.00 0 58.72 -12 30.8 0.718 1.351 100.9 8.6 247 273 13.00 0 51.82 -12 25.4 0.705 1.365 103.4 8.6 258 273 14.00 0 44.62 -12 19.4 0.693 1.378 105.9 8.6 269 273 15.00 0 37.12 -12 12.7 0.681 1.392 108.5 8.6 280 274 16.00 0 29.32 -12 5.2 0.670 1.406 111.2 8.6 291 274 17.00 0 21.23 -11 57.0 0.660 1.419 114.0 8.6 302 274 18.00 0 12.85 -11 47.8 0.651 1.433 116.8 8.6 313 274 19.00 0 4.20 -11 37.8 0.643 1.447 119.7 8.6 323 275 20.00 23 55.28 -11 26.7 0.636 1.461 122.7 8.7 333 275 21.00 23 46.13 -11 14.6 0.629 1.475 125.7 8.7 342 275 22.00 23 36.76 -11 1.4 0.624 1.488 128.8 8.7 350 276 23.00 23 27.21 -10 47.2 0.620 1.502 131.9 8.7 356 276 24.00 23 17.51 -10 31.9 0.617 1.516 135.0 8.8 362 276 25.00 23 7.69 -10 15.7 0.615 1.530 138.2 8.8 366 277 26.00 22 57.81 -9 58.5 0.614 1.544 141.3 8.8 369 277 27.00 22 47.89 -9 40.4 0.615 1.557 144.5 8.9 369 277 28.00 22 37.99 -9 21.5 0.616 1.571 147.6 8.9 369 277 29.00 22 28.15 -9 2.0 0.620 1.585 150.7 9.0 366 278 30.00 22 18.41 -8 42.0 0.624 1.599 153.8 9.0 363 278 31.00 22 8.81 -8 21.5 0.629 1.613 156.7 9.1 357 278 Guy M Hurst