Альнитак

50Zet Ori

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Alnitak is a rare O-type star, the hottest spectral class, its blue colour matched by a negative B–V index of −0.199. Designated Zeta Orionis, it forms the easternmost star of Orion's Belt and lies about 736 light-years away. At apparent magnitude 1.74 it is the brightest O-type star of the night sky, and its absolute magnitude of −5.03 marks an intrinsic luminosity thousands of times the Sun's. A near-equatorial declination of −1° makes Alnitak visible worldwide, where it anchors one end of the Belt that makes Orion among the most readily recognised constellations.

Физические свойства

Спектральный класс O Class O — O-type (Blue)
Показатель цвета (B−V) -0,199

Наблюдение

Видимая звёздная величина +1.74
Абсолютная звёздная величина -5,03
Расстояние 736 ly
Созвездие Orion

Положение

Прямое восхождение 5h 40,76m
Склонение -1° 56,55′

Frequently Asked Questions

What type of star is Альнитак?
Альнитак is a Class O — O-type (Blue) star.
How far is Альнитак from Earth?
Альнитак is approximately 736.2 light-years from Earth.
Can you see Альнитак with the naked eye?
With an apparent magnitude of 1.74, Альнитак is visible to the naked eye.
What constellation is Альнитак in?
Альнитак is located in the constellation Orion.