| 词条 | HD 225218 |
| 释义 |
| name = HD 225218 }}{{Starbox observe | epoch = J2000 | ra = {{RA|00|04|36.58707}} | dec = {{DEC|+42|05|33.1118}} | appmag_v = 6.133 (6.16 + 9.65)[3] | constell = Andromeda }}{{Starbox character | class = B9III[4] + F0V: | b-v = 0.15 | u-b = 0.14 | variable = }}{{Starbox astrometry | radial_v = −8.0[5] | prop_mo_ra = {{val|-11.35|0.42}} | prop_mo_dec = {{val|-12.64|0.36}} | parallax = 2.59 | p_error = 0.56 | parallax_footnote = | absmag_v = }}{{Starbox orbit | reference = [9] | period = 70.12 | axis = 0.165 | eccentricity = 0.515 | inclination = | node = | periastron = | periarg = | periarg_primary = | k1 = | k2 = }}{{Starbox detail | mass = | radius = | luminosity = 394[10] | temperature = 7,611[10] | metal = | rotation = 25[12] | age = }}{{Starbox catalog | names = BD+41 4933, HD 225218, HIP 365, HR 9105, NSV 15012, SAO 36037, WDS J00046+4206. }}{{Starbox reference | Simbad = HD+225218 }}{{Starbox reference | Simbad = ADS+30 }}{{Starbox end}}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,[4] an apparent magnitude of 6.16,[3] and is a candidate Lambda Boötis star.[15] It has a fainter, magnitude 9.65 companion, HD 225218 B, at an angular separation of 5.2″ along a position angle of 171°.[3] 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.[9] Component B is likewise a spectroscopic binary.[15] References1. ^1 {{citation | last=Wilson | first=R. E. | year=1953 | title=General Catalogue of Stellar Radial Velocities | publisher=Carnegie Institute of Washington, D.C. | bibcode=1953GCRV..C......0W}} Vizier catalog entry[1][2][3][4][5][6][7]2. ^1 2 {{citation | display-authors=1 | last1=Cowley | first1=A. | last2=Cowley | first2=C. | last3=Jaschek | first3=M. | last4=Jaschek | first4=C. | title=A study of the bright A stars. I. A catalogue of spectral classifications | journal=Astronomical Journal | volume=74 | pages=375–406 |date=April 1969 | doi=10.1086/110819 | bibcode=1969AJ.....74..375C}} 3. ^1 {{citation | display-authors=1 | last1=Abt | first1=Helmut A. | last2=Levato | first2=Hugo | last3=Grosso | first3=Monica | title=Rotational Velocities of B Stars | journal=The Astrophysical Journal | volume=573 | issue=1 | pages=359–365 | date=July 2002 | doi=10.1086/340590 | bibcode=2002ApJ...573..359A}} 4. ^1 2 {{citation | display-authors=1 | last1=Malkov | first1=O. Yu. | last2=Tamazian | first2=V. S. | last3=Docobo | first3=J. A. | last4=Chulkov | first4=D. A. | title=Dynamical Masses of a Selected Sample of Orbital Binaries | journal=Astronomy & Astrophysics | volume=546 | id=A69 | pages=5 | date=2012 | doi=10.1051/0004-6361/201219774 | bibcode =2012A&A...546A..69M}} 5. ^1 2 {{citation | display-authors=1 | last1=McDonald | first1=I. | last2=Zijlstra | first2=A. A. | last3=Boyer | first3=M. L. | title=Fundamental Parameters and Infrared Excesses of Hipparcos Stars | journal=Monthly Notices of the Royal Astronomical Society | volume=427 | issue=1 | pages=343–57 | date=2012 | bibcode=2012MNRAS.427..343M | arxiv=1208.2037 | doi=10.1111/j.1365-2966.2012.21873.x}} 6. ^1 2 3 {{citation | display-authors=1 | author=Mason, Brian D. | author2=Wycoff, Gary L. | author3=Hartkopf, William I. | author4=Douglass, Geoffrey G. | author5=Worley, Charles E. | title=The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog | journal=The Astronomical Journal | volume=122 | issue=6 | pages=3466–3471 | date=December 2001 | doi=10.1086/323920 | bibcode=2001AJ....122.3466M}} 7. ^1 2 {{citation | last1=Faraggiana | first1=Rosanna | last2=Bonifacio | first2=Piercarlo | title=How many lambda Bootis stars are binaries? | journal=Astronomy and Astrophysics | volume=349 | pages=521–531 | date=September 1999 | bibcode=1999A&A...349..521F|arxiv = astro-ph/9906009 }} }} External links
7 : Andromeda (constellation)|Henry Draper Catalogue objects|Multiple star systems|B-type giants|HR objects|Hipparcos objects|Durchmusterung objects |
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