Two vets, a pilot saw a sphere, change to cigar, get big and small, not plane, not space station, moving slow at 60k+'

While hanging out at my friend's apartment, myself a veteran, and one friend, a veteran pilot, saw an object in the sky. Initially they thought it was Venus. Though, I noticed it moving initially. It was moving too slow to be the space station, but I looked up its position to be sure. The object at our best guess was 60k+ feet altitude and took approximately 30 minutes to travel roughly 45 degrees. It moved from the west to the east in a slightly southerly trajectory advancing roughly 10 degrees. When we first saw it, it was spherical and bright. When it got more directly overhead it changed in size looking like its distance from us changed. It became significantly more cigar shaped, and at times brighter and less luminous. It looked like it doubled in size and then shrank, as well as going from white to gray / difficult to see against the sky. I took pictures with my phone and video, but they did not come out well.