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HD 225218

Quadruple star system in the constellation of Andromeda

Quadruple star system in the constellation of Andromeda

| b-v = 0.15 | u-b = 0.14 HD 225218 is a quadruple star system in the northern constellation of Andromeda. The primary component, HD 225218 A, is a giant star with a stellar classification of B9III, an apparent magnitude of 6.16, and is a candidate Lambda Boötis star. It has a fainter, magnitude 9.65 companion, HD 225218 B, at an angular separation of 5.2″ along a position angle of 171°. The primary itself has been identified as a binary star system through interferometry, with the two components separated by 0.165″. The pair, HD 225218 Aa and Ab, orbit each other with a period of about 70 years and an eccentricity of 0.515. Component B is likewise a spectroscopic binary.

References

References

  1. {{Cite Gaia EDR3. 384361163101836160
  2. {{Cite Gaia EDR3. 384361163100177280
  3. {{cite constellation. HD 225218
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andromeda-(constellation) henry-draper-catalogue-objects multiple-star-systems b-type-giants bright-star-catalogue-objects hipparcos-objects durchmusterung-objects
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