Circular No. 4792 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION Postal Address: Central Bureau for Astronomical Telegrams Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. Telephone 617-495-7244/7440/7444 (for emergency use only) TWX 710-320-6842 ASTROGRAM CAM EASYLINK 62794505 MARSDEN or GREEN@CFA.BITNET MARSDEN or GREEN@CFAPS2.SPAN WX CETI R. H. McNaught, Coonabarabran, N.S.W.; and G. M. Hurst, Basingstoke, England, report that A. Pearce, Perth, Western Australia, has detected this object, which is possibly of WZ-Sge type (Downes and Margon 1981, M.N.R.A.S. 197, 35P), at a rare outburst, apparently the first since 1963. The following visual magnitude estimates have been reported: June 3.91 UT, 10.8 (Pearce); 4.70, 10.8 (A. F. Jones, Nelson, New Zealand; communicated by F. M. Bateson via P. M. Kilmartin); 4.77, 11.0 (Jones); 4.83, 11.4 (Pearce); 4.92, 11.5 (Pearce). Photometry by A. C. Gilmore, Mount John University Observatory, on June 4.75 UT: V = 11.47, U-B = -0.78:, B-V = -0.11; V-R = -0.03; V-I = -0.1. Spectroscopic coverage would be very useful. U GEMINORUM J. Mattei, AAVSO, reports the following magnitude estimates, showing that this dwarf nova is in outburst: June 2.15 UT, 9.8 (R. King, Duluth, MN); 3.12, 9.6 (R. Hays, Worth, IL). SUPERNOVA 1989L IN NGC 7339 A. Uomoto, Johns Hopkins University, reports: "Spectra (range 450-750 nm) obtained on June 4.46 UT with the Kitt Peak 4-m reflector/ Cryocam show this object to be a type II supernova near maximum light. H alpha and H beta are present in emission, with H alpha showing a P-Cyg profile. Strong interstellar Na D absorption is seen at the redshift of NGC 7339. The V magnitude from the spectrometer is 15.4 +/- 0.1. Offsets from a nearby star are 10".5 east and 10".0 north." V482 CYGNI Visual magnitude estimates (cf. IAUC 4672): 1988 Nov. 13.91 UT, 14.1 (M. Verdenet, Bourbon-Lancy, France); 25.75, [14.1 (A. Boattini, Florence, Italy); Dec. 6.71, 14.3 (Boattini); 13.72, 14.2 (Boattini); 1989 Jan. 2.74, 14.2 (Boattini); Mar. 7.17, 14.5 (P. Schmeer, Bischmisheim, West Germany); 23.17, 13.9 (Boattini); Apr. 6.6, [13.5 (T. Kato, Kyoto, Japan); May 9.07, 13.5 (Boattini); 15.10, 13.5 (Schmeer); 21.94, 13.5 (S. Korth, Dusseldorf, West Germany); 23.95, 13.0 (Korth); 26.98, 12.7 (Schmeer). 1989 June 5 (4792) Brian G. Marsden
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