Early this morning we measured the brightness changes of a car tumbling in space! Credit to Erik Dennihy (@UNC), we can report that Tesla Roadster (Starman, 2018-017A) is rotating with a period of 4.7589 +/- 0.0060 minutes. pic.twitter.com/LA4YzdvjK9

— JJ Hermes (@jotajotahermes) February 11, 2018