You can actually see down to magnitude 6, and this will be perhaps 7.6. (Note: In this case magnitude does not mean “times 10” but rather “times two” and the bigger numbers = fainter. So the sun is negative 26 or 27)

You can often see Juno with a descent telescope, but if conditions are good, you should be able to see it with the naked eye.

Juno’s a bit too faint to be seen with the naked eye (but should be fairly easy with binoculars if you know where to look). You were probably thinking of Vesta which sometimes becomes brighter than magnitude 6 (but not this year).

To find it, go out into the night in a relatively unpolluted sky and look near Uranus.

Must… not…

There are always a few objects worth checking out, but it’s not always easy to know when or where to look. Heavens-Above has always been a good resource for me. You can get good information about viewing natural astronomical objects, as well as artificial satellites.