Triangle shape only saw one light in the front and two in the rear. Was not super high in the air and made a low/soft humming noise.

I was standing outside stargazing with my two small children. I noticed a craft out of the corner of my eye and disregarded it as an airplane. My youngest daughter asked “dad, what’s that” I told her “it is an airplane” Then I paused and said “but it’s the wrong shape……with the wrong lights….. And wrong sound” I wish I had gotten a video but at that point it was in the tree line. It moved pretty slow and the sound was a low humming sound. Grew up on Air Force bases. Did not sound like a plane to me.