Jonathan McDowell of the Harvard-Smithsonian Center for Astrophysics gave a great talk at the CfA on this topic a few years back. He created GCAT, a database th

Jonathan McDowell of the Harvard-Smithsonian Center for Astrophysics gave a great talk at the CfA on this topic a few years back. He created GCAT, a database that attempts to track all artificial space objects. https://planet4589.org/space/gcat/web/cat/index.html https://planet4589.org/space/gcat/web/cat/index.html I'm looking forward to Public Observatory Night resuming in person someday. :(