It was 10pm, on Saturday night, August 30th. I was talking on my phone with a friend, when I looked up, and saw a plane Heading north of phoenix. Then, at the same time, I saw a blinking, and slower pulsating object that was flying adjacent to the plane.
I didn't think about it at first, but then I realized that this object's light was actually blinking very slowly, a lot slower than the planes tail lights that it was flying by. I also realized that commercial planes don't fly that close to each other, and that this other object actually shifted directions after about two minutes in, from when I saw it flying near the plane, and then the object split off from the plane to head NW.
Honestly, I was more busy with the call than to get any evidence. But I wanted to post this sighting to see if any other sky watchers saw this object, or, if it's just a known aircraft. Either way, as a sky watcher, these sightings are cool to have, and each one is a learning experience.