I was backing to make an early trip. Looking up from my back yard as the lights on this object didn't match the surrounding stars. I saw what appeared to be a shadowy triangle shape, very large, gigantic. Because it sort of blended in with the background I simple discounted the situation as imagination. As I was packing up my car I would continue to look up. The object was moving, taking a northeast direction and doing so very slowly. I could see this happening because the triangle would slowly cover and uncover stars behind it.The lights didn't completely remain white, they would flicker a rainbow of colors.I had to leave and there were no neighbors to wake at 3am in the morning. However I did wake my husband. I was in a hurry to leave for my trip.....I should have taken photos....that's the only real proof isn't it.