------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 1758 2002 Mar 28 17.46UT 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 F1 (UTSUNOMIYA) Brian Marsden at the Minor Planet Center, USA, has provided updated orbital elements for this comet on MPEC 2002-F57: T 2002 Apr. 22.953 TT q 0.44060 (2000.0) P Q Peri. 125.676 -0.064027 -0.353243 Node 288.923 +0.226695 +0.905658 e 1.0 Incl. 80.631 +0.971859 -0.234526 >From 41 observations 2002 Mar. 20-24. The following ephemeris by Guy Hurst was calculated using EPH.EXE by Nick James. There is quite significant change in the predicted positions from that given on TA E-Circular 1756: m1 = 8.5 + 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 27.00 22 19.82 +12 47.6 1.429 0.788 32.1 8.2 237 51 28.00 22 24.96 +13 47.9 1.409 0.770 31.9 8.1 244 51 29.00 22 30.32 +14 49.4 1.389 0.752 31.6 8.0 252 52 30.00 22 35.93 +15 51.9 1.370 0.734 31.4 7.8 259 53 31.00 22 41.78 +16 55.4 1.352 0.716 31.1 7.7 267 53 2002 Apr 1.00 22 47.91 +17 59.7 1.334 0.698 30.8 7.6 275 54 2.00 22 54.32 +19 4.6 1.317 0.680 30.4 7.4 284 55 3.00 23 1.04 +20 9.9 1.301 0.663 30.0 7.3 292 56 4.00 23 8.09 +21 15.4 1.286 0.646 29.6 7.1 300 57 5.00 23 15.48 +22 20.8 1.271 0.629 29.2 7.0 308 58 6.00 23 23.22 +23 25.7 1.258 0.612 28.7 6.9 317 59 7.00 23 31.35 +24 29.7 1.245 0.596 28.2 6.7 325 61 8.00 23 39.86 +25 32.5 1.233 0.580 27.7 6.6 332 62 9.00 23 48.77 +26 33.4 1.223 0.565 27.2 6.5 340 64 10.00 23 58.08 +27 32.0 1.213 0.550 26.6 6.3 347 66 11.00 0 7.80 +28 27.7 1.205 0.536 26.1 6.2 354 67 12.00 0 17.93 +29 19.9 1.197 0.522 25.5 6.1 360 69 13.00 0 28.44 +30 8.0 1.192 0.509 25.0 5.9 365 72 14.00 0 39.31 +30 51.2 1.187 0.497 24.4 5.8 370 74 15.00 0 50.52 +31 29.0 1.183 0.486 23.9 5.7 373 76 16.00 1 2.01 +32 0.8 1.181 0.476 23.4 5.6 376 79 17.00 1 13.73 +32 26.0 1.180 0.467 22.9 5.5 378 82 18.00 1 25.62 +32 44.3 1.181 0.459 22.4 5.5 379 84 19.00 1 37.60 +32 55.3 1.182 0.452 22.0 5.4 378 87 20.00 1 49.59 +32 58.7 1.185 0.447 21.6 5.4 377 90 21.00 2 1.52 +32 54.7 1.189 0.444 21.3 5.3 374 93 22.00 2 13.30 +32 43.3 1.194 0.441 21.0 5.3 371 96 23.00 2 24.85 +32 24.8 1.201 0.441 20.7 5.3 366 98 24.00 2 36.11 +31 59.6 1.208 0.441 20.5 5.4 360 101 25.00 2 47.03 +31 28.2 1.216 0.444 20.4 5.4 354 104 26.00 2 57.55 +30 51.2 1.225 0.448 20.3 5.4 347 106 27.00 3 7.65 +30 9.3 1.235 0.453 20.2 5.5 339 109 28.00 3 17.31 +29 23.1 1.245 0.459 20.2 5.6 331 111 29.00 3 26.52 +28 33.4 1.256 0.467 20.2 5.7 323 113 30.00 3 35.27 +27 40.7 1.268 0.476 20.3 5.8 314 115 Guy M Hurst