------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 1104 1996 July 31 19.59UT 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 57P/DU TOIT-NEUJMIN-DELPORTE A report on IAUC 6441 suggests this comet is in outburst: 1996 July 24.78UT, 13.3 (A.Nakamura, Japan 0.60-m refl.+CCD) 26.08UT, 13.3 (H.Mikuz, Slovenia, 0.20-m refl.+CCD+V) 26.45UT, 11.8 (A.Hale, USA 0.41-m refl. visual) At this time the predicted magnitude according to the ICQ 1996 Handbook is m1 about 19.0. Ephemeris by G.Hurst using EPH.EXE by N.James and elements from NK 590 (S.Nakano): Date R.A. (2000) Dec. R r Elong Mag. Motion h m o ' (AU) (AU) o "/hr P.A. 1996 July 31.00 2 27.88 +14 28.7 1.928 2.160 88.8 18.9 41 76 1996 Aug 1.00 2 28.96 +14 32.7 1.922 2.165 89.5 19.0 40 76 2.00 2 30.02 +14 36.6 1.915 2.170 90.2 19.0 39 76 3.00 2 31.06 +14 40.3 1.909 2.175 90.9 19.0 39 76 4.00 2 32.08 +14 44.0 1.902 2.180 91.6 19.0 38 76 5.00 2 33.08 +14 47.4 1.895 2.185 92.3 19.0 37 77 6.00 2 34.05 +14 50.8 1.889 2.190 93.0 19.0 36 77 7.00 2 35.00 +14 54.0 1.882 2.195 93.7 19.0 35 77 8.00 2 35.92 +14 57.0 1.875 2.200 94.5 19.0 34 77 9.00 2 36.82 +15 0.0 1.869 2.205 95.2 19.0 33 77 10.00 2 37.70 +15 2.7 1.862 2.210 95.9 19.0 32 78 11.00 2 38.55 +15 5.4 1.855 2.215 96.7 19.0 31 78 12.00 2 39.37 +15 7.9 1.849 2.220 97.4 19.0 30 78 13.00 2 40.17 +15 10.3 1.842 2.225 98.2 19.0 29 79 14.00 2 40.95 +15 12.5 1.835 2.231 99.0 19.0 28 79 15.00 2 41.69 +15 14.6 1.829 2.236 99.8 19.1 27 79 16.00 2 42.41 +15 16.5 1.822 2.241 100.5 19.1 26 80 17.00 2 43.11 +15 18.3 1.815 2.246 101.3 19.1 25 80 18.00 2 43.77 +15 20.0 1.809 2.251 102.1 19.1 24 80 19.00 2 44.41 +15 21.5 1.802 2.256 102.9 19.1 23 81 20.00 2 45.03 +15 22.9 1.796 2.261 103.8 19.1 22 81 21.00 2 45.61 +15 24.1 1.789 2.266 104.6 19.1 21 82 22.00 2 46.16 +15 25.2 1.783 2.272 105.4 19.1 20 83 23.00 2 46.69 +15 26.1 1.776 2.277 106.3 19.1 19 83 24.00 2 47.19 +15 26.9 1.770 2.282 107.1 19.1 18 84 25.00 2 47.66 +15 27.6 1.764 2.287 108.0 19.1 17 85 26.00 2 48.10 +15 28.1 1.757 2.292 108.8 19.1 16 86 27.00 2 48.51 +15 28.5 1.751 2.297 109.7 19.1 14 87 28.00 2 48.90 +15 28.7 1.745 2.303 110.6 19.1 13 88 29.00 2 49.25 +15 28.8 1.739 2.308 111.4 19.2 12 90 30.00 2 49.57 +15 28.8 1.733 2.313 112.3 19.2 11 91 31.00 2 49.87 +15 28.6 1.726 2.318 113.2 19.2 10 94 The above magnitudes are the original predictions and do not take into account the present outburst. Guy M Hurst