Alnitak is a triple star system at the eastern end of Orion's Belt, the second-magnitude primary having a 4th-magnitude companion nearly 3 arcseconds distant, in an orbit taking over 1,500 years. The part called Alnitak A is itself a close binary, comprising the stars Alnitak Aa …

2019年9月7日 · Alnitak Aa, the primary star in the Zeta Orionis system, is a hot blue supergiant with the stellar classification O9.5 Iab. It is the brightest class O star in the sky. The star has a visual magnitude of 2.0 and an absolute magnitude of -6.0.

2020年1月30日 · Alnitak is a triple star system that lies at around 1.260 light-years / 387 parsecs from the Sun. The star system is composed of Alnitak Aa – a blue supergiant of spectral type O9.5lab, Alnitak Ab – a blue subgiant of spectral type B1lV, and Alnitak B …

Alnitak, also designated as ζ Orionis (zeta Orionis), is a variable and multiple supergiant star of spectral class O9 in the constellation of Orion. Alnitak visual magnitude is 2.05, making it the 52th brightest star in the sky.

2025年1月28日 · Alnitak (Zeta Orionis) is a blue less luminour supergiant star in the constellation of Orion. It can be seen in the night sky. Alnitak distance from Earth is 736.26 light years away.

2016年4月15日 · Alnitak is the brightest class O star in the night sky, shining with an apparent visual magnitude of 1.74. It is 33 times bigger than the Sun, 20 times its diameter and shines 10,000 times its luminosity.

2023年4月10日 · Its leftmost star, Alnitak (pronounced ALL-nye-tack), is our focus this month. Alnitak is blue because it’s hotter than most stars. And boy, is it hot, shining at visible wavelengths with the...

The Alnitak Star is a blue-white supergiant star (c LBV) and is estimated to be the 33rd most luminous star of all the known stars. Its luminosity is the amount of energy emission from this giant star relative to the Sun.

2017年7月12日 · Alnitak (Zeta Orionis) is a blue supergiant star in the Orion constellation, and forms part of the Hunter’s Belt along with the stars Alnilam and Mintaka. It is also the brightest O-type star in the entire night sky, with an apparent visual magnitude of +2.0.

2012年1月31日 · Alnitak or Zeta Orionis (Zet Ori) is the 5th brightest naked eye star in the constellation Orion. With an apparent magnitude of 1.74c, Alnitak is the 31st brightest star in the entire sky (see: 50 Brightest Stars ).