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Upsilon Andromedae

Upsilon Andromedae was the first star determined to have more than one extrasolar planet. So far, three such objects have been discovered within the system; all three are believed to be gas giants.

The Three Extrasolar Planets of Upsilon Andromedae

  • A
  • B
    • Distance from UA: 0.83AU
    • Mass: 2.11 MJ
    • Orbital Period: 242 days
  • C
    • Distance from UA: 2.5AU
    • Mass: 4.61 MJ
    • Orbital Period: 3.5 years



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