(1993 Feb. 21) subject: CCD observation of SW UMa Only three measurable frames have been obtained due to the cloud. Magnitudes are differential ones. Comparison: 083710.82 +533000.4 (2000.0) 12.1 object YYMMDD(UT) mag filter SW UMa 930220.774 2.837 V 930220.775 2.474 V 930220.808 3.302 V Regards, Taichi Kato
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