THE ASTRONOMER Electronic Circular No 651 1992 July 7 20.06UT 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 TELECOM GOLD: 10074:MIK2885 GMH at UK.AC.RUTHERFORD.STARLINK.ASTROPHYSICS STARLINK: RLSAC::GMH ------------------------------------------------------------------- GK PERSEI Bill Worraker, Didcot, reports that he has observed GK Persei bright as follows: 1992 July 7.031UT, 11.8 (0.26-m refl.). Other estimates have since become available, partly from AAVSO: 1992 June 19.029, 13.1 (Gary Poyner, Birmingham); 29.043, 13.2 (Patrick Schmeer, Germany); July 3.31, 12.3 (John Bortle, USA); 4.38, 12.3 (M.Adams, USA); 5.38, 12.1 (Adams); 6.38, 11.8 (Adams). Worraker also reported the last outburst event on IAUC 4819 in 1989 July. SUPERNOVAE 1992ae AND 1992af L. Wells, Cerro Tololo Interamerican Observatory; and J. Maza, University of Chile, report the discoveries by R. Antezana (University of Chile) of two apparent supernovae on unfiltered 20-min IIa-O exposures taken by L. Wells with the CTIO Curtis Schmidt telescope. SN 1992ae, at mpg about 18 on June 27.30 UT, is located 3" east and 5" north of the nucleus of an anonymous galaxy (R.A. = 21h24m26s.8, Decl. = -61 46'12", equinox 1950.0). SN 1992af, at mpg about 17.5 on June 29.28, is located 10" east and 3" south of the nucleus of the spiral galaxy ESO 340-G38 (R.A. = 20h27m17s.0, Decl. = -42 28'39"). Confirmation of both SNe 1992ae and 1992af was made by K. Wakamatsu (Gifu University) and M. Malkan (University of California, Los Angeles) from B and V CCD images obtained on July 2.31-2.32 with the CTIO 0.9-m telescope, and by C. Anguita (University of Chile) from B and V images obtained on July 2.32-2.33 at the CTIO 1.5-m telescope. IAUC 5554 SUPERNOVA 1992ag IN ESO 508-G67 J. Maza, University of Chile; and M. Hamuy, Cerro Tololo Interamerican Observatory, report the discovery by M. Wischnjewsky of a supernova located about 4" west of the nucleus of the spiral galaxy ESO 508-G67 (IRAS 13214-2337; R.A. = 13h21m26s.0, Decl. = -23 37'06", equinox 1950.0). The supernova, of mpg about 16.5, was found on a 20-min unfiltered IIa-O plate taken by L. Wells with the CTIO Curtis Schmidt telescope on June 29.127 UT. Confirmation was made by K. Wakamatsu (Gifu University) and M. Malkan (University of California, Los Angeles) from B and V images obtained on July 3.021 with the CTIO 0.9-m telescope. IAUC 5555 COMET SHOEMAKER-LEVY (1991a1) Further estimates (cf E647): 1992 June 30.97, 8.7 (Herman Mikuz, Slovenia, 20x60B); 3.94, 8.3 (Mikuz, 7x50B); 6.934, 7.8 (Guy Hurst, Basingstoke, 15x80B). Guy M Hurst