The video shows “a recognizable part of the western sky” including the bright star Altair that is consistent with the sky around 7 p.m. in early December, James Lattis, director of the University of Wisconsin-Madison astronomy department’s Space Place, said in an email.
Lattis said the “vast majority” of the objects are satellites that are visible because they are reflecting sunlight to the observer, and “the rest of the objects are probably a mixture of satellites in higher inclination orbits and aircraft.”