mira
It is 754.81 milliarcseconds. Also, the star is Rigil Kentaurus, not Rigel which is the name of another star.
The star Rigel was named by the Arabic astronomers. Rigel is derived from the Arabic word "rijl" which means "foot," as it represents the foot of the Orion constellation.
There is more than one star in the Rigel "system". The main star, in terms of brightness, is Rigel A. That has a surface temperature of about 12,000 degrees Celsius.
The brightness of a star depends not just on its surface temperature, but also on its size and distance from Earth. While Rigel is hotter than the Sun, it is also a much larger and more luminous star. Therefore, even though the Sun is cooler than Rigel, it appears brighter to us because it is much closer and has a larger luminosity due to its size.
You can tell if Rigel or Betelgeuse is hotter based on their color. Rigel appears blue-white, indicating a hotter temperature, while Betelgeuse appears orange-red, suggesting a cooler temperature. Additionally, the spectral class of Rigel (B8Ia) is hotter than Betelgeuse's spectral class (M1-2Ia).
Mira (Omicron Ceti) is cooler than Rigel. Mira has an effective temperature of about 2,500 to 3,000 Kelvin, while Rigel, a blue supergiant, has an effective temperature of approximately 11,000 Kelvin. Therefore, Mira is significantly cooler than Rigel.
Cooler can be subjective depending on the context, but in terms of stellar characteristics, Rigel is generally considered "cooler" than Mira. Rigel is a blue supergiant star with a surface temperature of about 11,000 K, making it one of the hottest stars visible to the naked eye. In contrast, Mira is a red giant star with a much lower surface temperature of around 2,500-3,000 K. Thus, if by "cooler" you mean temperature, Mira is cooler, but Rigel's brightness and mass make it fascinating as well.
No, Rigel is hotter than the Sun. Rigel is a blue supergiant star with a surface temperature that is much hotter than the Sun.
Rigel is a triple star system.
No, it is not cooler than my sun.
The Rigel star is a star in the Orion constellation. Rigel is the brightest star in the Orion constellation, and it is the seventh brightest star seen in the night's sky.
Rigel appears as bright as Betelgeuse because it is hotter and more luminous, even though it is smaller. The luminosity of a star depends on both its temperature and size, so a hotter, more luminous star can shine as brightly as a larger, cooler star.
Rigel is the brightest star in the constellation Orion
Rigel B is also a blue-white star but, unlike Rigel A, it is a main sequence star.
Rigel is a blue-white star, while Betelgeuse is a red supergiant star.
Rigel by far.
No. Proxima Centauri is the nearest star. Rigel is much further away.