THE ASTRONOMER Electronic Circular No 602 1992 Jan 22 17.45UT Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke, Hants, RG22 4PP,England. Telephone/FAX(0256)471074 Int:+44256471074 Telex: 9312111261 Answerback: TA G JANET BOXES: GMH at UK.AC.CAM.ASTRONOMY.STARLINK or GUYH at UK.AC.SUSSEX.CLUSTER TELECOM GOLD: 10074:MIK2885 PRESTEL 256471074 ------------------------------------------------------------------- COMET HELIN-ALU (1992a) E. Helin and J. Alu report their discovery of a comet on films exposed by them and K. Lawrence with the 0.46-m Schmidt telescope at Palomar. The object is described as diffuse without central condensation. Measurements by Alu: 1992 UT R.A. (2000) Decl. m1 Jan. 9.49566 8 22 35.00 + 5 03 16.0 16.5 9.52378 8 22 33.86 + 5 03 02.7 10.49375 8 21 49.05 + 4 53 52.9 IAUC 5432 COMET ZANOTTA-BREWINGTON (1991g1) Ephemeris based on improved elements (cf E593): T 1992 Jan 31.9902 TT w 197.86990 ) e 1.00000000 O 254.91390 ) 2000.0 q 0.6439710 A.U. i 50.02580 ) Source: MPC 19467 Positions are geocentric 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. 1992 Jan 22.00 22 54.11 -1 7.3 0.778 0.678 43.3 7.8 265 133 23.00 22 59.30 -2 20.6 0.769 0.672 42.9 7.7 269 134 24.00 23 4.50 -3 36.3 0.761 0.666 42.5 7.6 273 135 25.00 23 9.70 -4 54.4 0.753 0.661 42.2 7.6 277 136 26.00 23 14.89 -6 14.8 0.746 0.657 41.8 7.5 281 136 27.00 23 20.07 -7 37.3 0.739 0.653 41.5 7.5 284 137 28.00 23 25.22 -9 1.8 0.733 0.650 41.3 7.5 286 138 29.00 23 30.35 -10 28.1 0.728 0.647 41.1 7.4 288 139 30.00 23 35.44 -11 56.0 0.723 0.645 40.9 7.4 289 140 31.00 23 40.49 -13 25.2 0.719 0.644 40.8 7.4 290 141 1992 Feb 1.00 23 45.49 -14 55.5 0.715 0.644 40.8 7.4 290 141 2.00 23 50.44 -16 26.7 0.712 0.644 40.8 7.4 289 142 3.00 23 55.34 -17 58.5 0.709 0.645 40.8 7.4 288 143 4.00 0 0.18 -19 30.6 0.708 0.647 41.0 7.4 286 144 5.00 0 4.96 -21 2.7 0.706 0.650 41.1 7.4 284 144 6.00 0 9.68 -22 34.6 0.706 0.653 41.4 7.4 281 145 7.00 0 14.33 -24 6.0 0.706 0.657 41.7 7.4 277 145 8.00 0 18.92 -25 36.8 0.706 0.661 42.1 7.4 273 146 9.00 0 23.44 -27 6.6 0.707 0.666 42.5 7.5 269 146 10.00 0 27.91 -28 35.3 0.708 0.672 42.9 7.5 264 146 11.00 0 32.31 -30 2.7 0.710 0.678 43.4 7.6 259 147 12.00 0 36.65 -31 28.6 0.713 0.685 44.0 7.6 254 147 13.00 0 40.94 -32 52.9 0.715 0.693 44.6 7.7 248 147 14.00 0 45.18 -34 15.5 0.719 0.701 45.2 7.7 243 147 15.00 0 49.38 -35 36.3 0.722 0.709 45.9 7.8 237 148 16.00 0 53.53 -36 55.2 0.726 0.718 46.5 7.9 231 148 17.00 0 57.65 -38 12.2 0.730 0.728 47.3 7.9 225 148 18.00 1 1.75 -39 27.3 0.734 0.738 48.0 8.0 220 147 19.00 1 5.81 -40 40.3 0.739 0.748 48.7 8.1 214 147 20.00 1 9.87 -41 51.4 0.743 0.759 49.5 8.2 209 147 21.00 1 13.91 -43 0.4 0.748 0.770 50.3 8.2 203 147 22.00 1 17.95 -44 7.5 0.753 0.781 51.1 8.3 198 147 23.00 1 21.99 -45 12.7 0.758 0.793 51.9 8.4 193 146 24.00 1 26.05 -46 16.0 0.764 0.805 52.8 8.5 188 146 Guy M Hurst