THE ASTRONOMER Electronic Circular No 516 1991 Apr 30 18.36UT 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 ------------------------------------------------------------------- EX HYDRAE Brian Marsden relays a report from F.M.Bateson, Royal Astronomical Society of New Zealand that this dwarf nova (RA 12h49m43s DEC -28 58.7, 1950) is having a rare outburst. A.F.A.L.Jones of Nelson has: Apr. 28.33UT, 10.1; 29.34, 10.6; 28.35, 10.4. The last outburst was reported in 1987 (IAUC 4383, 4385, 4387). SUPERNOVA 1991T IN NGC 4527 Further estimates reported (cf E513): 910420.910, 11.7 pv M Mobberley 910420.927, 11.9 v S Korth 910420.930, 11.9 v K Andersson 910420.930, 12.0 v B Granslo 910420.948, 11.8 v D Moore 910420.990, 11.8 v A Pereira 910421.020, 12.0 v G Poyner 910421.035, 12.0 v P Schmeer 910421.520, 11.8 V A Gilmore 910421.887, 11.9 v P Schmeer 910421.896, 11.9 v S Korth 910421.900, 11.7 v J Toone 910421.930, 11.7 v G Poyner 910421.940, 12.2 v M Villi 910422.006, 11.9 v P Schmeer 910422.037, 11.9 v H Mikuz 910422.081, 11.3 v D Moore 910422.120, 11.6 v G Lubcke 910422.130, 11.6 v P Steffey 910422.868, 11.8 v G Hurst 910422.875, 11.7 v G Hurst 910422.895, 11.5 v J Toone 910422.900, 11.3 v G Poyner 910422.903, 11.5 v W Worraker 910422.940, 11.4 v B Granslo 910423.049, 11.8 pv H Mikuz/A Dolzan 910423.100, 11.4 v P Steffey 910423.872, 11.7 v P Schmeer 910424.150, 11.3 v G Lubcke 910424.872, 11.5 v P Schmeer 9104r5.915, 12.1 v S Korth 910425.924, 12.2 V H Mikuz 910427.899, 11.4 v J Toone NOVA IN THE LARGE MAGELLANIC CLOUD 1991 A. C. Gilmore reports the following photometry obtained with the 0.6-m Cassegrain reflector at Mt. John University Observatory on Apr. 21.39 UT: V = 10.23 +/- 0.01, U-B = -0.8 +/- 0.2, B-V = 0.00 +/- 0.01, V-R = +0.11 +/- 0.01, V-I = +0.18 +/- 0.03. W. Liller, Vina del Mar, Chile, notes that this nova is now the brightest one seen in the LMC; its peak absolute magnitude is ex- pected to equal approximately that of V1500 Cyg. Visual magnitude estimates (those by Liller are photovisual): Apr. 19.001 UT, 12.5 (Liller); 19.98, 11.8 (Liller); 21.04, 10.4 (Liller); 21.99, 9.8 (Liller); 23.76, 8.8 (T. Cooper, Benoni, R.S.A.); 24.73, 9.2 (Cooper); 24.77, 9.0 (D. Overbeek, Edenvale, R.S.A.). IAUC 5250 Guy M Hurst