Husband and I were on our way to Reno from Las Vegas right around Hawthorn . It was very late at nite. I was looking out of the window from the back seat while attempting to take a nap and saw the object. It followed us for about 20 min. I don't remember if I told my husband or not. I was just very intrigued, and watched until it disappeared. I blinked and it was gone. I know we were going quite fast above 75 mph no speed limits back then in the middle of nowhere nevada.