I’ve shown a number of people and they always say “it’s a planet, Venus or Mercury” and they won’t watch it long enough to see it move south. I would guess that it is at about 4-7,000ft elevation as that is about what the planes are at that distance when they are at the same altitude but somewhat north of the stationary object. I’ve been seeing this for about 4-5 years and it seems constant on clear nights.
It looks almost like a bouy (water bouy/channel marker) in the sky. It is much to far away to be able to hear it, I would guess it is about 15-20 miles when it is visible and for it to be as bright as it is, it must be a VERY bright light.