in M51 was discovered 2005.06.27 by German
astronomer Wolfgang Kloehr. It should continue to brighten somewhat
from its current magnitude of 13.5, and then decline in brightness
over the next several months.
The image on the left
shows the supernova; the image on the right was taken in 2002 and
can be used for comparison.
2005cs in M51
300mm LX200 SCT (f/6.7), ST8I Camera
10 Minute Exposure, 2005.06.30