How close would you guesstimate it was?
And how big relative to your thumbnail or fist extended at arm’s length?
Miles.Was in my sister's back yard looking west, watching jets of some kind appearing to fly as fast west as they could and then come back.(repeatedly) Davis-Monthan is up I-19. I had binoculars.
I looked Southwest and saw what looked like a pulsating star. Through binoculars It looked like it had red green, yellow, red and white lights rotating in an eccentric fashion. Almost like one of those weighted baby toy balls. It also appeared to have no lateral movement. It was not close so I can't judge size. It was no blimp flying over that part of the Sonoran Desert.