THE ASTRONOMER Electronic Circular No 391 1990 Mar 4 19.00UT Microlink:MAG60138 JANET:GMH at UK.AC.RO-GREENWICH.STARLINK Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke, Hants, RG22 4PP, England. Telephone: (0256)471074 Int:+44256471074 Telex: 94082518 Answerback: TAGUY ------------------------------------------------------------------ SUPERNOVA 1990F IN ANONYMOUS GALAXY C. Pollas, Observatoire de la Cote d'Azur, reports his discovery on Schmidt plates taken by A. Maury of a possible supernova located RA 13h36m46s.48, Dec+32 24'32".9(1950), which is 5.6"W 1.4"S of the nucleus of an anonymous face-on spiral galaxy; end figures of a nearby star (mpg 18.5): 41s.55, 35".1. Magnitude estimates of the SN candidate: Jan. 23.2 UT, B > 22.3; Feb. 24.1, V about 18.7; 25.0, B about 19.2. There is a very faint, diffuse, blue condensation at the location of the SN. IAUC 4969 COMET AUSTIN (1989c1) The orbital elements below, by B. G. Marsden, from MPC 16001, are based on observations through Feb. 19. The corresponding 'original' 1/a = -0.00041 +/- 0.00016, supporting the statement on IAUC 4958 that the comet is probably 'new' in the Oort sense. Epoch = 1990 Apr. 19.0 ET T = 1990 Apr. 9.9761 ET Peri. = 61.5546 e = 1.000380 Node = 75.2132 1950.0 q = 0.349957 AU Incl. = 58.9596 The predicted magnitudes in the following ephemeris are mean values of the formulae used on IAUC 4926 and 4958. 1990 ET R.A. (1950) Decl. Delta r m1 Mar. 30 1 45.69 +11 22.1 1.255 0.468 2.8 Apr. 4 1 46.50 +18 14.8 9 1 40.86 +25 03.4 1.048 0.351 1.4 14 1 26.76 +30 35.9 19 1 06.26 +34 04.9 0.810 0.434 1.6 24 0 42.60 +35 43.6 29 0 16.84 +36 00.2 0.601 0.625 2.4 May 4 23 47.93 +35 07.4 9 23 13.16 +32 54.6 0.418 0.830 2.6 14 22 28.20 +28 34.7 19 21 27.99 +20 25.7 0.273 1.029 2.6 24 20 11.62 + 6 48.5 29 18 50.46 - 9 09.8 0.249 1.219 3.0 June 3 17 41.91 -20 54.8 8 16 52.58 -27 27.6 0.387 1.401 4.4 IAUC 4972 TA INDEX Brian Manning can now be contacted by our MICROLINK subscribers using: (C:GB,PUB:GOLD 400,PVT:UK.AC,O:birmingham,SN:BGWM, OU:space-research,OU:starlink) Guy M Hurst