A new supernova (1325+47B SUPERNOVA 2005cs) in M51 was discovered June 28 by Wolfgang Kloehr, Schweinfurt, Germany. It is at ~ 14th magnitude but is expected to peak at 10.6. A chart is available at:
http://www.aavso.org/tmp/ngc5194-tb.png
http://www.aavso.org/tmp/ngc5194-tb.png