Centaurus IX is a planet, located in the Alpha Centauri system.
During the Dominion War, the planet was held by the Dominion. In 2374, Admiral William Ross was planning a Starfleet ground assault on Centaurus IX and was to present his plan to his fellow Admirals Sitak and Coburn. Ross later decided against the ground assault, preferring to give Benjamin Sisko the meeting with Starfleet Command to outline his plan to retake Deep Space 9. (DS9 - The Dominion War novelization: ...Sacrifice of Angels)
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| Stars, systems and objects of the Centaurus constellation | ||||||||||||||||||||||||||||||||||||||||||||||
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| 1 Centauri • Alpha Centauri (Rigil Kentaurus • Quindar • Proxima) • Beta Centauri • Tau Centauri • Theta Centauri • Zeta Centauri | 
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| Alpha Centauri sector | ||||||||||||||||||||||||||||||||||||||||||||||
| Alpha Centauri system | Alpha Centauri A (primary) • Alpha Centauri I • II. Behemoth (Alpha Centauri II-A) • Alpha Centauri III (1 moon) • IV. Centaurus (2 moons) • Alpha Centauri V (2 moons) • Alpha Centauri VI (8 moons) • VII. Al Rijil • Alpha Centauri VIII • Alpha Centauri IX • Alpha Centauri X • Alpha Centauri XI • Alpha Centauri XII • Alpha Centauri XIII • Toralon |   
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| Alpha Centauri B • Olson • II. New Montana • Perry • III. Lang • IV. Kent | ||||||||||||||||||||||||||||||||||||||||||||||
| Proxima Centauri • Proxima Centauri (Proxima Maintenance Yards) • Proxima Centauri I (Proxima Centauri I-A) • Proxima Centauri II • Proxima Alpha • Proxima Beta | ||||||||||||||||||||||||||||||||||||||||||||||