Rigel

Also known as Beta Orionis, 19 Orionis, Beta Ori, β Ori, 19 Ori, β Orionis, HIP 24436, HIC 24436

Rigel is a blue supergiant star in the equatorial constellation of Orion. It has the Bayer designation β Orionis, which is Latinized to Beta Orionis and abbreviated Beta Ori or β Ori. Rigel is the brightest and most massive componentand the eponymof a star system of at least four stars that appear as a single blue-white point of light to the naked eye. This system is located at a distance of approximately .

AI overview

Rigel is a blue supergiant star in the constellation Orion and the brightest star in a multi-star system that appears as a single point of light to the naked eye. It matters as one of the most prominent and massive stars visible from Earth, making it a significant object of study for astronomers and a recognizable landmark in the night sky.

AI-generated from the Wikipedia summary — may contain errors.

Wikidata facts

Distance from Earth: 860
Diameter: 103000000
Radius: 78.9
Mass: 18
Image: Orion constellation map.png

Show 15 more facts

Commons category: Rigel
catalog code: ALS 14772
spectral class: B8IAE,SB,VB
apparent magnitude: 0.13
parallax: 4.22
absolute magnitude: -7.84
right ascension: 78.634467067
declination: -8.201638365
effective temperature: 12100
radial velocity: 16.9
stellar rotational velocity: 37
surface gravity: 56
right ascension component of proper motion: 1
declination component of proper motion: -1
P8979: Starobrno Brewery

Sources (4)

via Wikidata · CC0

~24 min read

Article

15 sections

Contents

Nomenclature
Observation
Spectroscopy
Variability
Mass loss
Distance
Stellar system
Physical characteristics
Evolution
Etymology and cultural significance
In modern culture
See also
Notes
References
External links

A star of spectral type B8Ia, Rigel is calculated to be anywhere from 61,500 to 363,000 times as luminous as the Sun, and 18 to 24 times as massive, depending on the method and assumptions used. Its radius is more than seventy times that of the Sun, and its surface temperature is . Due to its stellar wind, Rigel's mass-loss is estimated to be ten million times that of the Sun. With an estimated age of seven to nine million years, Rigel has exhausted its core hydrogen fuel, expanded, and cooled to become a supergiant. It is expected to end its life as a TypeII supernova, leaving a neutron star or a black hole as a final remnant, depending on the initial mass of the star.