Beta Lyrae

β Lyrβ LyraeSheliakanimationBetaβ Lyr (Sheliak)β Lyrae Aa1
Beta Lyrae (β Lyrae, abbreviated Beta Lyr, β Lyr) is a multiple star system in the constellation of Lyra.wikipedia
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Lyra

Lyramong the starsConstellation of Orpheus
Beta Lyrae (β Lyrae, abbreviated Beta Lyr, β Lyr) is a multiple star system in the constellation of Lyra. Beta Lyrae bore the traditional name Sheliak (occasionally Shelyak or Shiliak), derived from the Arabic الشلياق šiliyāq or Al Shilyāk, one of the names of the constellation of Lyra in Islamic astronomy.
Beta Lyrae is the prototype of a class of binary star known as Beta Lyrae variables.

Chinese star names

Chinese nameChinese uranographyTraditional Chinese star names
Consequently, the Chinese name for Beta Lyrae itself is 漸台二 (Jiāntāièr, the Second Star of Clepsydra Terrace.)

Stellar classification

spectral typeK-typeG-type
Beta Lyrae Aa is a semidetached binary system made up of a stellar class B7 main sequence primary star and a secondary that is probably also a B-type star.

Variable star

variablevariable starsvariability
The variable luminosity of this system was discovered in 1784 by the British amateur astronomer John Goodricke.
John Goodricke himself discovered Delta Cephei and Beta Lyrae.

Gamma Lyrae

γ LyrSulafatGamma
In Chinese astronomy, Tsan Tae (漸台 (Jiāntāi), meaning Clepsydra Terrace, refers to an asterism consisting of this star, Delta² Lyrae, Gamma Lyrae and Iota Lyrae.
In Chinese astronomy, 漸台 (Jiāntāi), meaning Clepsydra Terrace, refers to an asterism consisting of this star, Delta 2 Lyrae, Beta Lyrae and Iota Lyrae.

John Goodricke

Goodricke, John
The variable luminosity of this system was discovered in 1784 by the British amateur astronomer John Goodricke.
Goodricke is credited with discovering the periodic variation of β Lyrae and δ Cephei, the prototypical example of the Cepheid variable stars.

Binary star

spectroscopic binaryeclipsing binarybinary
Beta Lyrae Aa is a semidetached binary system made up of a stellar class B7 main sequence primary star and a secondary that is probably also a B-type star. These are also the A, B and C components of a wider system designated WDS J18501+3322, which has additional components designated WDS J18501+3322D, E and F. Beta Lyrae A itself consists of an eclipsing binary pair (Beta Lyrae Aa) and a single star (Ab).
Orbital periods can be less than an hour (for AM CVn stars), or a few days (components of Beta Lyrae), but also hundreds of thousands of years (Proxima Centauri around Alpha Centauri AB).

Constellation

constellationsEuropean constellationModern constellation
Beta Lyrae (β Lyrae, abbreviated Beta Lyr, β Lyr) is a multiple star system in the constellation of Lyra.

Stellar parallax

parallax shiftparallaxparallax measurements
Based on parallax measurements obtained during the Hipparcos mission, it is approximately 960 ly distant from the Sun.

Hipparcos

HIPHipparcos CatalogueHipparcos satellite
Based on parallax measurements obtained during the Hipparcos mission, it is approximately 960 ly distant from the Sun.

Sun

solarSolThe Sun
Based on parallax measurements obtained during the Hipparcos mission, it is approximately 960 ly distant from the Sun.

Latinisation of names

LatinizedLatinisedlatinisation
β Lyrae (Latinised to Beta Lyrae) is the system's Bayer designation, established by Johann Bayer in his Uranometria of 1603.

Bayer designation

BayerdesignationBayer letter
β Lyrae (Latinised to Beta Lyrae) is the system's Bayer designation, established by Johann Bayer in his Uranometria of 1603.

Johann Bayer

Bayer Johann BayerBayer, Johann
β Lyrae (Latinised to Beta Lyrae) is the system's Bayer designation, established by Johann Bayer in his Uranometria of 1603.

Uranometria

1603Uranometria atlasUranometria Omnium Asterismorum
β Lyrae (Latinised to Beta Lyrae) is the system's Bayer designation, established by Johann Bayer in his Uranometria of 1603.

Washington Double Star Catalog

WDSWashington Double Star CatalogueWDS catalog
WDS J18501+3322 is a designation in the Washington Double Star Catalog.

International Astronomical Union

IAUWorking Group for Planetary System NomenclatureInternational Astronomical Union (IAU)
The designations of the constituents as Beta Lyrae A, B and C, or alternatively WDS J18501+3322A, B and C, and additionally WDS J18501+3322D, E and F, and those of A's components - Beta Lyrae Aa, Aa1, Aa2 and Ab - derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU). In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN) to catalogue and standardize proper names for stars.

Arabic

Arabic languageArabic-languageArab
Beta Lyrae bore the traditional name Sheliak (occasionally Shelyak or Shiliak), derived from the Arabic الشلياق šiliyāq or Al Shilyāk, one of the names of the constellation of Lyra in Islamic astronomy.

Astronomy in the medieval Islamic world

astronomerastronomyIslamic astronomy
Beta Lyrae bore the traditional name Sheliak (occasionally Shelyak or Shiliak), derived from the Arabic الشلياق šiliyāq or Al Shilyāk, one of the names of the constellation of Lyra in Islamic astronomy.

IAU Working Group on Star Names

Working Group on Star NamesIAU-approved
In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN) to catalogue and standardize proper names for stars.

Star system

multiple star systemtriple starmultiple systems
Beta Lyrae (β Lyrae, abbreviated Beta Lyr, β Lyr) is a multiple star system in the constellation of Lyra. The designations of the constituents as Beta Lyrae A, B and C, or alternatively WDS J18501+3322A, B and C, and additionally WDS J18501+3322D, E and F, and those of A's components - Beta Lyrae Aa, Aa1, Aa2 and Ab - derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU).

Chinese astronomy

ChineseastronomyChinese astronomers
In Chinese astronomy, Tsan Tae (漸台 (Jiāntāi), meaning Clepsydra Terrace, refers to an asterism consisting of this star, Delta² Lyrae, Gamma Lyrae and Iota Lyrae.

Ox (Chinese constellation)

OxLeft FlagRight Flag
In Chinese astronomy, Tsan Tae (漸台 (Jiāntāi), meaning Clepsydra Terrace, refers to an asterism consisting of this star, Delta² Lyrae, Gamma Lyrae and Iota Lyrae.

Asterism (astronomy)

asterismasterismsFalse Cross
In Chinese astronomy, Tsan Tae (漸台 (Jiāntāi), meaning Clepsydra Terrace, refers to an asterism consisting of this star, Delta² Lyrae, Gamma Lyrae and Iota Lyrae.