THE ASTRONOMER Electronic Circular No 511 1991 Apr 17 20.28UT Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke, Hants, RG22 4PP, England. Telephone: (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 ------------------------------------------------------------------- SUPERNOVA 1991T IN NGC 4527 The editor has found two exposures each of NGC 4527 and NGC 4536, with equivalent length exposure times, taken on 1983 Feb 22 by the late Alan Young. A preliminary sequence has been deduced from the negatives held in the archival collection, courtesy of Peggy Young. Comparison Approximate offsets in arc seconds Magn AA (from N4536) 100E 750S 9.11 B 450E 080N 10.8 C 460W 130N 12.3 D 110W 430S 12.7 E 250W 600N 13.0 F 220W 010S 13.7 G 130W 380S 14.0 H 200E 140N 14.3 J 100E 120N 14.8 K 110E 030S 15.0 Sequence references: TA 910415 BAAVSS SN/018.01 The possibility that this supernova has been caught on the rise, is very bright and the galaxy is currently very well placed in the early evening sky provides an excellent opportunity to study this object over a prolonged interval. Please e-mail your results quoting date, time (UT decimal), full estimate (eg A-1;B+2etc), deduced magnitude, class, and instrumentation. Paper versions of the preliminary (C) chart can be supplied to current subscribers on e-mail request. SV SAGITTAE We have received a request from professional astronomers for intensive coverage of this R CrB variable during its current fade (cfE505). The latest estimate by G.Poyner (Birmingham) places it at 13.4 on Apr 16 (02.35UT). Please e-mail results daily. Guy M Hurst