Donatu system is a star system. This system had at least five planets. The Donatu system was located in the Beta Quadrant, near the Federation-Klingon border. In 2245, the fifth planet was the site of an inconclusive battle between the two superpowers. (TOS: "The Trouble with Tribbles")

• Donatu (primary)
  • Donatu I
  • Donatu II
  • Donatu III
  • Donatu IV
  • Donatu V