Mu Bootis is a double star in the constellation Bootes. They are quite a pretty pair.
If you have found the previous double, this one should be easy to find. It will be just over 1 binocular field NNE of Delta Bootis.

Facts about Mu Bootis by Keith Turnecliff

The brighter star shines with a bluish tint.

This star chart represents a view from Long Itchington for late June at 10pm.
Credits: Image courtesy of Starry Night Pro Plus 8, researched and implemented by Keith Turnecliff.