Sunday July 2nd asteroid 3 Juno will be at opposition, that is, it will be 180o from the Sun with the Earth between the two. At opposition, any Sun orbiting object beyond Earth rises at about local time for sunset and sets at local time for sunrise. At about 9th-10th magnitude the asteroid will be too faint to be seen with binoculars or the naked eye.
There are, however, a couple brighter objects sort of surrounding 3 Juno including Asteroid Hebe at 4th magnitude, and the outer planet Saturn at nearly 0 magnitude.
Asteroid 3 Juno was the third asteroid discovered, hence its numerical prefaced name. It was discovered by German astronomer Karl L. Harding in 1804, and it is the 11th largest asteroid.