Alnilam is the central star of Orion's Belt in the equatorial constellation of Orion. It has the Bayer designation ε Orionis, which is Latinised to Epsilon Orionis and abbreviated Epsilon Ori or ε Ori. This is a massive, blue supergiant star some 1,200 light-years distant.

2021年3月9日 · Alnilam is the middle star in the famous three-member belt of Orion, the Hunter. The belt is so easily recognizable because all three stars are spaced evenly in a (roughly) straight line and appear to be about the same brightness.

2024年12月11日 · Alnilam is the central star of Orion’s Belt, an asterism known since ancient times. Orion’s Belt is also formed by the bright stars Alnitak (Zeta Orionis) and Mintaka (Delta Orionis). Alnilam is the only single star of the three, as well as the brightest.

2020年1月30日 · Alnilam is around 537.000 times brighter than our Sun, it is the brightest star of Orion’s Belt. Because of this brightness, it illuminates a molecular cloud, NGC 1990, that appears to have surrounded the star.

Alnilam, the blue supergiant star, has a variable brightness that ranks it as the 29th most luminousstar of all the known stars viewed from Earth. Its luminosity is the amount of energy emission from this giant star relative to the Sun.

2017年7月12日 · Alnilam (Epsilon Orionis) is a massive B-type blue supergiant star found in the Belt of Orion. With an average apparent visual magnitude of +1.69, it is the 4th brightest star in the constellation, the 29th brightest star in the entire night sky, and one of the 58 stars used in celestial navigation and identifying one’s relative positions.

2025年2月4日 · Alnilam is the 29th brightest star in the night sky and the 4th brightest star in Orion based on the Hipparcos 2007 apparent magnitude. Based on a parallax of 1.65, Alnilam distance from Earth can be calculated at being 1,976.75 light years away or 411.52 parsecs.

Alnilam, also designated as ε Orionis (epsilon Orionis), is a variable and double hypergiant star of spectral class B0 in the constellation of Orion. Alnilam visual magnitude is 1.7, making it the 28th brightest star in the sky.

Alnilam, also called Epsilon Orionis, is a blue supergiant star and the central star of Orion's Belt in the constellation Orion. It is 42 times the Sun's diameter but over 800,000 times brighter. [1] It is over 400 parsecs or 1,300 light years away. [2]

2020年1月20日 · Alnilam is a supergiant at around 2.000 light-years away from Earth, located in the middle of the belt. It has a magnitude of 1.70 and it is the 29 th-brightest star in the night sky and the fourth-brightest in Orion. Alnilam is around 375.000 times brighter than our sun while other estimates place it at around 832.000 times more brighter.