4.5 billion km from the Sun (30 times the distance of the Earth from the Sun)
165 Earth years
49,000 km (3.9 times the diameter of the Earth)
16 Earth hours
17 times the mass of the Earth
Neptune is known to have (at least) 14 moons.
The largest moon is Triton, which has a diameter of 2,700 km (0.8 times the diameter of the Moon) and orbits at a distance of 350,000 km.