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| Planet Name | Class | Diametre (km) | Position | Moons | Gravity | Day (hrs.) | Atmosphere | Climate | Industry |
| Arcturus | M | 10,200 | IV | 7 | 0.78G | 25.0 | Terrestrial | Warm Temperate | Commerce |
| Planet Q | M | 15,100 | V | 2 | 1.0G | 24.0 | Terrestrial | Cool Temperate | Administration |
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Arcturus (also known as Alpha Bootis or Hokule'a) is a star with a system in Federation space. It is the location of the planet Arcturus IV, homeworld of the Arcturians.
As an unaligned area in the year 2265, Arcturus was the home of the Merchant's Guild, a criminal organization akin to the Orion Syndicate.
System Planet Q is an inhabitable planet located in the Arcturian system. By the late 23rd century, Planet Q was the site of a Federation colony. By the 2260s, researcher Thomas Leighton and his wife Martha had located themselves on the colony. During a visit by the Karidian Company of Players in late 2266, Leighton discovered that Anton Karidian was actually the wanted mass murderer, Kodos the Executioner. After making the discovery, Leighton had the USS Enterprise diverted to Planet Q and pleaded with Captain James T. Kirk to investigate and hopefully expose Karidian.
Astronomical data
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