NASA located an Indian spacecraft (called Chandrayaan-1) which had lost contact back in 2008:
http://gizmodo.com/nasa-just-found-a-lost-spacecraft-orbiting-the-moon-1793137314
This was done using guesses on where it would be, and then microwave and radar signals were sent. This particular satellite was India’s first shuttle to the moon. It had successfully mapped and done some geology prior to having lost contact.