Q13414

star in the constellation Canis Major

Key facts

Constellation: Canis Major
Right ascension: 06 58 37.54876
Declination: −28 ° 58 ′ 19.5102 ″
Evolutionary stage: Blue giant , main sequence or stellar merger product
Spectral type: B2 II or B2 III-II
U b color index: −0.93
B v color index: −0.21

via Wikipedia infobox

Wikidata facts

Official name: Adhara
Distance from Earth: 430
Radius: 13.9
Mass: 12.6
Image: Canis major constellation map.png

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spectral class: B2II-III
catalog code: ALS 14800
stellar rotational velocity: 26
apparent magnitude: 2.15
right ascension: 104.656453151
declination: -28.972086157
effective temperature: 22205
radial velocity: 29.1
parallax: 8.05
metallicity: -0.75
surface gravity: 2240
luminosity: 38700
absolute magnitude: -4.8
right ascension component of proper motion: -1
declination component of proper motion: -1
age estimated by a dating method: 22.5
Commons category: Adhara

Sources (6)

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Article

Epsilon Canis Majoris is a binary star system and the second-brightest star in the constellation of Canis Major. Its name is a Bayer designation that is Latinised from ε Canis Majoris, and abbreviated Epsilon CMa or ε CMa. This is the 22nd-brightest star in the night sky with an apparent magnitude of 1.50. About 4.7 million years ago, it was the brightest star in the night sky, with an apparent magnitude of −3.99. Based upon parallax measurements obtained during the Hipparcos and the Gaia mission, it is about 405–428 light-years distant.

The two components are designated ε Canis Majoris A, officially named Adhara /əˈdɛərə/ – the traditional name of the system, and B.