HD 225218

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title: "HD 225218" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["andromeda-(constellation)", "henry-draper-catalogue-objects", "multiple-star-systems", "b-type-giants", "bright-star-catalogue-objects", "hipparcos-objects", "durchmusterung-objects"] description: "Quadruple star system in the constellation of Andromeda" topic_path: "general/andromeda-constellation" source: "https://en.wikipedia.org/wiki/HD_225218" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Quadruple star system in the constellation of Andromeda ::

| name = HD 225218 | epoch = J2000.0 | constell = Andromeda | component1 = HD 225218 A | ra1 = | dec1 = | appmag_v1 = 6.16 | component2 = HD 225218 B | ra2 = | dec2 = | appmag_v2 = 9.65 | class = B9III + F0V: | b-v = 0.15 | u-b = 0.14 | variable = | component1 = HD 225218 A | radial_v = −8.0 | prop_mo_ra = | prop_mo_dec = | parallax = 3.0041 | p_error = 0.3539 | parallax_footnote = | absmag_v = | component2 = HD 225218 B | radial_v2 = | prop_mo_ra2 = | prop_mo_dec2 = | parallax2 = 4.4324 | p_error2 = 0.0208 | parallax_footnote2 = | absmag_v2 = | reference = | period = 70.12 | axis = 0.165 | eccentricity = 0.515 | inclination = | node = | periastron = | periarg = | periarg_primary = | k1 = | k2 = | mass = | radius = | luminosity = 394 | temperature = 7,611 | metal = | rotation = 25 | age = | names = BD+41 4933, HD 225218, HIP 365, HR 9105, NSV 15012, SAO 36037, WDS J00046+4206 | Simbad = HD+225218 |sn=A | Simbad2 = HD+225218B |sn2=B 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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