Epsilon Canis Majoris

Adharaε CMaε Canis Majorisε Canis Majoris Aε CMa (Adhara)
Epsilon Canis Majoris (Latinised from ε Canis Majoris, abbreviated Epsilon CMa, ε CMa) is a binary star and, despite being designated ε (epsilon), the second-brightest object in the constellation of Canis Major and one of the brightest stars in the night sky with an apparent magnitude of 1.50.wikipedia
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Canis Major

CMaGreat DogCanis Major constellation
Epsilon Canis Majoris (Latinised from ε Canis Majoris, abbreviated Epsilon CMa, ε CMa) is a binary star and, despite being designated ε (epsilon), the second-brightest object in the constellation of Canis Major and one of the brightest stars in the night sky with an apparent magnitude of 1.50.
At magnitude 1.5, Epsilon Canis Majoris (Adhara) is the second-brightest star of the constellation and the brightest source of extreme ultraviolet radiation in the night sky.

List of brightest stars

brightest starsbrightest starone of the brightest stars
Epsilon Canis Majoris (Latinised from ε Canis Majoris, abbreviated Epsilon CMa, ε CMa) is a binary star and, despite being designated ε (epsilon), the second-brightest object in the constellation of Canis Major and one of the brightest stars in the night sky with an apparent magnitude of 1.50.

Apparent magnitude

apparent visual magnitudemagnitudevisual magnitude
Epsilon Canis Majoris (Latinised from ε Canis Majoris, abbreviated Epsilon CMa, ε CMa) is a binary star and, despite being designated ε (epsilon), the second-brightest object in the constellation of Canis Major and one of the brightest stars in the night sky with an apparent magnitude of 1.50.

Delta Canis Majoris

Wezenδ CMaδ Canis Majoris
Along with δ Canis Majoris (Wezen), η Canis Majoris (Aludra) and ο² Canis Majoris (Thanih al Adzari), these stars were Al ʽAdhārā, 'the Virgins'. In Chinese, 弧矢 (Hú Shǐ), meaning Bow and Arrow, refers to an asterism consisting of ε Canis Majoris, δ Canis Majoris, η Canis Majoris, κ Canis Majoris, ο Puppis, π Puppis, χ Puppis, c Puppis and k Puppis.
Delta Canis Majoris is the third-brightest star in the constellation after Sirius and ε Canis Majoris (Adhara), with an apparent magnitude of +1.83, and is white or yellow-white in colour.

Eta Canis Majoris

Aludraη Canis Majorisη CMa
Along with δ Canis Majoris (Wezen), η Canis Majoris (Aludra) and ο² Canis Majoris (Thanih al Adzari), these stars were Al ʽAdhārā, 'the Virgins'. In Chinese, 弧矢 (Hú Shǐ), meaning Bow and Arrow, refers to an asterism consisting of ε Canis Majoris, δ Canis Majoris, η Canis Majoris, κ Canis Majoris, ο Puppis, π Puppis, χ Puppis, c Puppis and k Puppis.
This star, along with Epsilon Canis Majoris (Adhara), Delta Canis Majoris (Wezen) and Omicron 2 Canis Majoris (Thanih al Adzari), were Al ʽAdhārā, 'the Virgins'.

USS Adhara

USS ''Adhara'' (AK-71)Adhara
USS Adhara (AK-71) was a U.S. Navy Crater-class cargo ship named after the star.
Named after the star Adhara in the constellation Canis Major, it was the only ship of the Navy to bear this name.

Omicron2 Canis Majoris

ο 2 CMaOmicron 2 Canis Majorisο 2 Canis Majoris
Along with δ Canis Majoris (Wezen), η Canis Majoris (Aludra) and ο² Canis Majoris (Thanih al Adzari), these stars were Al ʽAdhārā, 'the Virgins'.
This star, along with ε CMa (Adhara), δ CMa (Wezen) and η CMa (Aludra), were Al ʽAdhārā, the Virgins.

Kappa Canis Majoris

κ Canis Majorisκ CMa
In Chinese, 弧矢 (Hú Shǐ), meaning Bow and Arrow, refers to an asterism consisting of ε Canis Majoris, δ Canis Majoris, η Canis Majoris, κ Canis Majoris, ο Puppis, π Puppis, χ Puppis, c Puppis and k Puppis.
In Chinese, 弧矢 (Hú Shǐ), meaning Bow and Arrow, refers to an asterism consisting of κ Canis Majoris, δ Canis Majoris, η Canis Majoris, HD 63032, HD 65456, ο Puppis, k Puppis, ε Canis Majoris and π Puppis.

Omicron Puppis

ο Pupο Puppis
In Chinese, 弧矢 (Hú Shǐ), meaning Bow and Arrow, refers to an asterism consisting of ε Canis Majoris, δ Canis Majoris, η Canis Majoris, κ Canis Majoris, ο Puppis, π Puppis, χ Puppis, c Puppis and k Puppis.
In Chinese, 弧矢 (Hú Shǐ), meaning Bow and Arrow, refers to an asterism consisting of ο Puppis, δ Canis Majoris, η Canis Majoris, HD 63032, HD 65456, k Puppis, ε Canis Majoris, κ Canis Majoris and π Puppis.

Historical brightest stars

last and next five million yearssince
No other star has attained this brightness since, nor will any other star attain this brightness for at least five million years.

Pi Puppis

π Puppisπ PupPi
In Chinese, 弧矢 (Hú Shǐ), meaning Bow and Arrow, refers to an asterism consisting of ε Canis Majoris, δ Canis Majoris, η Canis Majoris, κ Canis Majoris, ο Puppis, π Puppis, χ Puppis, c Puppis and k Puppis.
In Chinese, 弧矢 (Hú Shǐ), meaning Bow and Arrow, refers to an asterism consisting of π Puppis, δ Canis Majoris, η Canis Majoris, HD 63032, HD 65456, ο Puppis, k Puppis, ε Canis Majoris and κ Canis Majoris.

Flag of Brazil

Brazilian flagflagBrazil
ε Canis Majoris appears on the national flag of Brazil, symbolising the state of Tocantins.

Latinisation of names

LatinizedLatinisedlatinisation
Epsilon Canis Majoris (Latinised from ε Canis Majoris, abbreviated Epsilon CMa, ε CMa) is a binary star and, despite being designated ε (epsilon), the second-brightest object in the constellation of Canis Major and one of the brightest stars in the night sky with an apparent magnitude of 1.50.

Binary star

spectroscopic binaryeclipsing binarybinary
Epsilon Canis Majoris (Latinised from ε Canis Majoris, abbreviated Epsilon CMa, ε CMa) is a binary star and, despite being designated ε (epsilon), the second-brightest object in the constellation of Canis Major and one of the brightest stars in the night sky with an apparent magnitude of 1.50.

Epsilon

ΕEGreek letter Epsilon
Epsilon Canis Majoris (Latinised from ε Canis Majoris, abbreviated Epsilon CMa, ε CMa) is a binary star and, despite being designated ε (epsilon), the second-brightest object in the constellation of Canis Major and one of the brightest stars in the night sky with an apparent magnitude of 1.50.

Constellation

constellationsEuropean constellationModern constellation
Epsilon Canis Majoris (Latinised from ε Canis Majoris, abbreviated Epsilon CMa, ε CMa) is a binary star and, despite being designated ε (epsilon), the second-brightest object in the constellation of Canis Major and one of the brightest stars in the night sky with an apparent magnitude of 1.50.

Night sky

night skiessky''' of the Earthsky of Earth
Epsilon Canis Majoris (Latinised from ε Canis Majoris, abbreviated Epsilon CMa, ε CMa) is a binary star and, despite being designated ε (epsilon), the second-brightest object in the constellation of Canis Major and one of the brightest stars in the night sky with an apparent magnitude of 1.50.

Stellar parallax

parallax shiftparallaxparallax measurements
Based upon parallax measurements obtained during the Hipparcos mission, it is about 430 light-years distant from the Sun.

Hipparcos

HIPHipparcos CatalogueHipparcos satellite
Based upon parallax measurements obtained during the Hipparcos mission, it is about 430 light-years distant from the Sun.

Light-year

light yearlight yearsMly
Based upon parallax measurements obtained during the Hipparcos mission, it is about 430 light-years distant from the Sun.

Sun

solarSolThe Sun
Based upon parallax measurements obtained during the Hipparcos mission, it is about 430 light-years distant from the Sun.

Bayer designation

BayerdesignationBayer letter
ε Canis Majoris (Latinised to Epsilon Canis Majoris) is the binary system's Bayer designation.

Star system

multiple star systemtriple starmultiple systems
The designations of the two components as ε Canis Majoris A and B derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU).

International Astronomical Union

IAUWorking Group for Planetary System NomenclatureInternational Astronomical Union (IAU)
The designations of the two components as ε Canis Majoris A and B derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU).

Arabic

Arabic languageArabic-languageArab
ε Canis Majoris bore the traditional name Adhara (sometimes spelled Adara, Adard, Udara or Udra), derived from the Arabic word عذارى ‘aðāra’, "virgins".