------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 1296 1998 Apr 28 18.25UT 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.demon.co.uk/astronomer ------------------------------------------------------------------- COMET C/1998 H1 (STONEHOUSE) The comet announced on E1295 has been designated as above. The following parabolic orbital elements by Brian Marsden, are based on 57 observations made at 10 observatories during Apr. 26-27: T = 1998 Apr. 14.205 TT Peri. = 1.146 Node = 222.103 2000.0 q = 1.48678 AU Incl. = 104.668 IAUC 6887 Ephemeris by Guy Hurst using EPH.EXE by Nick James: m = 10.0 + 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. 1998 Apr 28.00 15 18.99 +15 16.0 0.550 1.499 147.4 10.5 447 327 29.00 15 12.34 +17 43.9 0.558 1.501 145.8 10.5 434 327 30.00 15 5.69 +20 5.9 0.567 1.503 144.1 10.5 419 326 1998 May 1.00 14 59.06 +22 21.5 0.577 1.505 142.1 10.6 403 325 2.00 14 52.47 +24 30.1 0.589 1.508 140.0 10.6 385 324 3.00 14 45.95 +26 31.6 0.603 1.510 137.9 10.7 367 324 4.00 14 39.49 +28 25.7 0.617 1.513 135.7 10.8 349 323 5.00 14 33.14 +30 12.5 0.633 1.515 133.5 10.8 330 322 6.00 14 26.88 +31 52.2 0.649 1.518 131.3 10.9 312 321 7.00 14 20.75 +33 24.8 0.667 1.521 129.2 10.9 294 320 8.00 14 14.75 +34 50.7 0.685 1.524 127.1 11.0 277 319 9.00 14 8.89 +36 10.2 0.704 1.527 125.1 11.1 260 318 10.00 14 3.18 +37 23.7 0.724 1.530 123.1 11.1 244 317 11.00 13 57.63 +38 31.4 0.745 1.534 121.1 11.2 229 315 12.00 13 52.25 +39 33.8 0.766 1.537 119.3 11.3 215 314 13.00 13 47.03 +40 31.2 0.787 1.541 117.5 11.4 201 313 14.00 13 41.99 +41 24.0 0.810 1.545 115.7 11.4 189 312 15.00 13 37.12 +42 12.5 0.832 1.549 114.0 11.5 177 311 16.00 13 32.43 +42 57.0 0.855 1.552 112.4 11.6 166 310 17.00 13 27.92 +43 37.9 0.878 1.557 110.8 11.6 155 309 18.00 13 23.58 +44 15.4 0.901 1.561 109.2 11.7 146 308 19.00 13 19.42 +44 49.8 0.925 1.565 107.7 11.8 137 307 20.00 13 15.42 +45 21.3 0.949 1.569 106.3 11.8 128 306 21.00 13 11.60 +45 50.2 0.973 1.574 104.9 11.9 120 305 22.00 13 7.95 +46 16.7 0.997 1.579 103.5 12.0 113 304 23.00 13 4.46 +46 41.0 1.022 1.583 102.2 12.0 106 304 24.00 13 1.12 +47 3.3 1.046 1.588 100.9 12.1 99 303 25.00 12 57.95 +47 23.7 1.071 1.593 99.7 12.2 93 302 26.00 12 54.92 +47 42.4 1.096 1.598 98.5 12.2 87 301 27.00 12 52.05 +47 59.5 1.121 1.603 97.3 12.3 82 300 28.00 12 49.31 +48 15.2 1.146 1.608 96.1 12.4 77 299 29.00 12 46.71 +48 29.6 1.170 1.614 95.0 12.4 72 299 30.00 12 44.25 +48 42.8 1.195 1.619 93.9 12.5 67 298 31.00 12 41.92 +48 54.8 1.220 1.625 92.8 12.5 63 297 Guy M Hurst