M13, the Hercules Cluster. This is one of the go-to Globular Clusters in the Summer sky. The cluster lies in the halo of our galaxy, and is comprised of a couple hundred thousand old stars (>10 billion years), hence the yellowish tint.
Image taken last night, August 27th 2013 with the Takahashi refractor on top of the Whitman College science building. Image credit Danny Smith and Kalen Bergado.