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IAUC 5722: U Gem; 1993G; 29999-231-9304

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                                                  Circular No. 5722
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@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU)


U GEMINORUM
     J. Mattei, AAVSO, reports that this cataclysmic variable is
undergoing an outburst, as indicated by the following visual magnitude
estimates: Mar. 12.03 UT, 14.6 (J. Bortle, Stormville, NY); 16.78,
14.4 (R. Fidrich, Ibafa, Hungary); 18.84, 13.3 (G. Poyner, Birmingham,
England); 19.07, 13.4 (Bortle); 19.20, 12.9 (B. Stewart, Rochelle Park,
NJ); 19.32, 11.2 (R. Royer, Lakewood, CA); 19.54, 11.1 (Royer); 19.71,
9.0 (O. Gabzo, Kibbutz Sheffagim, Israel); 19.82, 9.5 (K. Medway,
Southampton, England).  The last outburst of U Gem was in Aug. 1992,
when it reached mag 9.3 on Aug. 30 and was brighter than mag 11 for
12 days.  U Gem has been monitored extremely closely since, and no
other outburst activity has been recorded.


SUPERNOVA 1993G IN NGC 3690
     D. D. Balam, L. Bogan, D. Zurek and R. M. Robb report a measurement
of V = 17.2 +/- 0.2 on Mar. 16.42 UT, using the 0.5-m reflector (+ CCD)
of the University of Victoria's Climenhaga Observatory.

     S. Pesci, Milan, Italy, reports that the supernova was not present
to limiting mag 15.6 on Feb. 11.8 and 19.8 UT.

     Corrigendum.  On IAUC 5720, the photospheric expansion velocity
should have been given as about 6000 km/s, not about 600 km/s.


29999-231-9304
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1993 March 21                  (5722)              Brian G. Marsden

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