|Orbit type||Near-Earth, chaotic|
|Semimajor axis||2.511 AU|
|Orbital period||3.98 years|
|Rotation period||5d 9h 50m + 7d 8h 24m|
|Discoverer||C. Pollas, 1989|
4179 Toutatis (asteroid 4179) is an Earth-crossing asteroid whose orbit, strongly influenced by Earth's gravity, is chaotic. Furthermore, its rotation combines two separate periodic motions that combine to produce a nonperiodic rotation; to someone on the surface of Toutatis the Sun would seem to rise and set in apparently random locations and times at the asteroid's horizon.