How long does Triton take to rotate once on its axis?

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Moons of Neptune: Triton — Triton Image of Triton, Neptune's largest satellite, captured by a camera aboard Voyager 2, 1989.

Triton rotates once on its axis every 5.877 days. This rotation period is synchronous with its orbital period, meaning the moon takes the same amount of time to rotate as it does to revolve around Neptune. As a result of this synchronous rotation, Triton always keeps the same face directed toward the planet.1