On 5aug17 at about 0100-0130 hours, in yellowstone national park, mammoth hot springs campground. looking at stars through binoculars, observed a star sized object, at about a ten o'clock angle, to the nw. it was changing colors, and sometimes wobbling, but like the stars near it, to far to focus on. i went back and forth between the object and a similarly sized star near by, with my binoculars. changed colors,(primary) from red, green, yellow, blue, and did not travel. i didn't think to watch for a pattern. i fell asleep after about thirty minutes observation. tried to see it again the following night, nothing.