
Xi Hydrae in Beta Quadrant star map image.
Xi Hydrae (also known as Rhys, Medusa system, 13 Crateris and 288 G Hydrae) is a binary star system located in Federation space near the Romulan Star Empire, visible from Earth in the Hydra constellation, in the galaxy's Beta Quadrant.
History and specifics
Xi Hydrae is the home of planet Xi Hydrae IV, more commonly known as Visalayan, homeworld of the Medusans. (ST references: Star Charts, The Worlds of the Federation)
Appendices
Connections
Stars, systems and objects of the Hydra constellation |
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Beta Hydra 378 • Gamma Hydra • Epsilon Hydrae • Lambda Hydrae • Pi Hydrae (Norkan) • Tau Hydrae (Celes) • Theta Hydrae (Gorath) • Xi Hydrae |
stars, systems and objects of the Crater constellation |
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Gamma Crateris binary: Crateris colony • Lambda Crateris binary |
Alpha and Beta Quadrant stars and star systems (X) | ||||||||||||||||||||||||||||||||||||||||||||||
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Xanthii • Xaraka • Xarlun • Xarmuk • Xarnex • Xarnial • Xer • Xerliur • Xerrias • Xerxes • Ximega • Xoja • Xormiur • Xornien • Xorxias • Xumiux • Xuner • Xuniek • Xuram • Xuxiaz • Xuziol | ![]() | |||||||||||||||||||||||||||||||||||||||||||||
Alpha Quadrant stars and systems (X) | Xi Andromedae • Xi Herculis • Xoxa • Xyrillia | ![]() | ||||||||||||||||||||||||||||||||||||||||||||
Beta Quadrant stars and systems (X) | Xarantine • Xhuj • Xi Hydrae • Xol | ![]() |
Alpha and Beta Quadrant stars and star systems (R) | ||||||||||||||||||||||||||||||||||||||||||||||
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Rachelis • Raddan • Rahwe • Rai • Rainsford • Rajatha • Rakon • Ramedes • Rasalgethi • Rastan • Ravanar • Raville • Refniai • Regal • Rejarris • Rell's Theta system • Relva • Rho Drunir • Rho Ophiuchi • Ribeldalia • Ribol • Ridix • Rigelken • Rivala • Rodden • Rogg • Romulus B • Rona Tan • Ross 154 • Ross 271 • Rousseau • Rovan • Rover • Ruchba • Ruli • RY Antliae | ![]() | |||||||||||||||||||||||||||||||||||||||||||||
Alpha Quadrant stars and systems (R) | Rakal system • Raknal • Rasalhague • Redansk • Regulon • Rho Capricorni • Rhota'Nev • Rissa • Rog • Rondac • Rotanev • Rudellia • Rymus | ![]() | ||||||||||||||||||||||||||||||||||||||||||||
Beta Quadrant stars and systems (R) | Ramatis • Rana • Rator • Regulus • Regulus A • Respler • Reytan • Rho Tucanae • Rigel systems: (Beta Orionis: Rigel A, Rigel BC • Beta Rigel) • Rigil Kentaurus • Romii system • Romulus B • Romulus system • Rotarran • Roulean | ![]() |
Background
Although the Star Trek reference work lists this as a binary, current astronomy has charted it as a solitary star.