Does callisto have any moons or satillites?
Callisto is a moon, and moons do not have moons of their own. The gravitational influence of the planet would overwhelm any tendency of a moon to acquire its own moons.
Jupiter actually has many satellites. As of February 2004, Jupiter had a confirmed number of 63 satellites, ranging from the largest four, the Galilean moons, Ganymede, Io, Callisto, and Europa. 53-55 of Jupiter's satellites are tiny and unimportant, small space objects caught in the planet's gravity
Callisto is the 2nd largest and 8th closest of Jupiter's known moons, with an orbit about 1.8 million km from Jupiter. It was discovered by Galileo in 1610 and is the most distant from Jupiter of the 4 large Galilean moons. Jupiter's large moons orbit rapidly compared to Earth's Moon. Callisto circles Jupiter every 16.7 Earth days.