Right Jurisdiction

fixed star

open 2 entries with the same name

Right Jurisdiction , i.e Corvus alpha (α Crv, α Corvi or Alchiba^[1] ）Is a Corvus F type white Main sequence star , 48.7 light years from the Earth, with an apparent magnitude of 4.03, is the fifth brightest star in the constellation Corvus, and is darker than Zhen Suyi ， Kraz ， Algorab and Zhen Suer 。^[2]

Chinese name: Right Jurisdiction
Foreign name: Alchiba
Al Minliar al Ghurab^[2]
Alias: Corvus alpha 、 Corvus 1^[3]
Classification: fixed star
Quality: 1.39 M⊙^[2]
surface temperature: 7041 K^[2]

Apparent magnitude: 4.03 etc
Absolute magnitude: 3.25 etc^[2]
Right ascension: 12:08:24.82^[3] (Epoch J2000.0)
Declination: -24°43′43.95″^[3] (Epoch J2000.0)
Distance from ground: 48.7 light years
Radius: 1.60 R ☉
Luminosity: 4.696 L ☉

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observation data

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Right Jurisdiction Is the main sequence star of F1 V-type spectrum, which may belong to Moving constellation Ursa Major , the mass is 1.39 times of the sun, the radius is 1.6 times of the sun, and the surface temperature is 7041 K Its luminosity is 4.696 solar luminosity.

In 2012, a study reported the spectral changes of the star in three days. The spectral observation initially showed that the right jurisdiction was a Optical binary , but subsequent observations did not find a companion star, and the right jurisdiction was also classified as suspected Doradus gamma variable The brightness of such stars usually changes by 0.1 magnitude in about one day.^[2]

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Inherent Name of Right Jurisdiction Alchiba (Pronunciation:/ˈ ☒ lk ɪ b ə/) From Arabic al-xibā , which means "tent". On September 12, 2016, International Astronomical Union The working group on star names (WGSN) approved this name. It can also be spelled Al Khiba, Alchibah and Alchita.^[2]

Research History

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Although the Right Jurisdiction Bayer designation Middle is Corvus alpha , but it is only the fifth brightest star in the constellation Zhen Suyi (Corvus gamma), Kraz (Corvus beta), Algorab (Raven δ) and Zhen Suer (Raven epsilon) should be dark. Some people think that Alpha Corvus may be brighter in the 17th century, because German astronomers at that time Johann Bayer Put Greek letters α Give the star. It is also possible that this star has changed its color in the past 1000 years, because the Persian astronomers in the 10th century Al Sufi Describe it as red.^[2]

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