------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 1755 2002 Mar 19 17.16UT 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/2002 C1 (IKEYA-ZHANG) Updated orbital elements by Brian Marsden have been released today on M.P.E.C. 2002-F21: Epoch 2002 Mar. 27.0 TT = JDT 2452360.5 T 2002 Mar. 18.98004 TT MPC q 0.5070628 (2000.0) P Q z +0.0195563 Peri. 34.66995 -0.54915816 -0.69067539 +/-0.0000173 Node 93.36873 +0.61957254 -0.71430987 e 0.9900837 Incl. 28.12121 +0.56085219 +0.11282251 The following updated ephemeris by Guy Hurst using EPH.EXE by Nick James revises and extends that on TA E-Circular 1745: m = 7.0 + 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. 2002 Mar 19.00 1 26.77 +19 25.9 0.817 0.507 30.5 3.6 191 2 20.00 1 26.79 +20 42.8 0.798 0.508 30.4 3.6 193 359 21.00 1 26.59 +22 0.5 0.779 0.509 30.3 3.5 196 357 22.00 1 26.14 +23 19.1 0.761 0.512 30.3 3.5 198 354 23.00 1 25.43 +24 38.3 0.742 0.516 30.3 3.5 201 352 24.00 1 24.45 +25 58.2 0.725 0.521 30.3 3.5 204 350 25.00 1 23.20 +27 18.5 0.707 0.527 30.4 3.5 206 347 26.00 1 21.66 +28 39.2 0.690 0.534 30.5 3.5 210 345 27.00 1 19.83 +30 0.3 0.674 0.542 30.7 3.5 213 343 28.00 1 17.70 +31 21.6 0.658 0.551 31.0 3.5 216 340 29.00 1 15.26 +32 43.0 0.643 0.560 31.4 3.5 219 338 30.00 1 12.50 +34 4.5 0.628 0.571 31.8 3.6 223 336 31.00 1 9.42 +35 26.0 0.613 0.582 32.3 3.6 226 334 2002 Apr 1.00 1 6.00 +36 47.5 0.599 0.593 32.9 3.6 230 332 2.00 1 2.23 +38 8.8 0.586 0.606 33.6 3.7 234 330 3.00 0 58.10 +39 29.9 0.573 0.619 34.4 3.7 238 328 4.00 0 53.59 +40 50.7 0.561 0.632 35.3 3.8 242 327 5.00 0 48.69 +42 11.2 0.549 0.646 36.3 3.8 246 325 6.00 0 43.36 +43 31.2 0.538 0.660 37.4 3.8 250 323 7.00 0 37.60 +44 50.7 0.527 0.674 38.6 3.9 254 321 8.00 0 31.37 +46 9.5 0.517 0.689 39.8 3.9 258 319 9.00 0 24.63 +47 27.5 0.507 0.704 41.2 4.0 262 318 10.00 0 17.36 +48 44.4 0.498 0.720 42.6 4.1 267 316 11.00 0 9.50 +50 0.2 0.489 0.735 44.2 4.1 271 314 12.00 0 1.03 +51 14.4 0.480 0.751 45.8 4.2 276 312 13.00 23 51.89 +52 26.9 0.472 0.767 47.5 4.2 281 310 14.00 23 42.03 +53 37.3 0.464 0.783 49.2 4.3 285 307 15.00 23 31.41 +54 45.1 0.457 0.799 51.1 4.3 290 305 16.00 23 19.96 +55 49.9 0.450 0.816 53.0 4.4 295 302 17.00 23 7.66 +56 51.1 0.444 0.832 54.9 4.4 300 300 18.00 22 54.47 +57 48.2 0.438 0.849 57.0 4.5 305 297 19.00 22 40.35 +58 40.3 0.433 0.866 59.1 4.6 309 294 20.00 22 25.31 +59 26.9 0.428 0.882 61.2 4.6 314 290 21.00 22 9.39 +60 7.0 0.423 0.899 63.4 4.7 319 287 22.00 21 52.63 +60 39.9 0.419 0.916 65.7 4.7 323 283 23.00 21 35.13 +61 5.0 0.416 0.933 68.0 4.8 327 279 24.00 21 17.03 +61 21.4 0.413 0.950 70.3 4.9 331 275 25.00 20 58.51 +61 28.6 0.410 0.967 72.7 4.9 334 271 26.00 20 39.77 +61 26.3 0.408 0.984 75.1 5.0 337 267 27.00 20 21.02 +61 14.2 0.406 1.001 77.5 5.0 340 263 28.00 20 2.50 +60 52.5 0.405 1.018 80.0 5.1 342 259 29.00 19 44.39 +60 21.2 0.405 1.034 82.4 5.2 343 255 30.00 19 26.88 +59 41.0 0.404 1.051 84.9 5.3 344 251 Guy M Hurst