Table of Contents
How hot is Sirius A?
Is Betelgeuse hotter than sun?
Betelgeuse is actually cooler than our sun. The sun’s surface temperature is about 5,800° Kelvin (about 10,000° Fahrenheit), and Betelgeuse is roughly half that, about 3,000° Kelvin (about 5,000° Fahrenheit). That is why it is red — red stars are cooler than the sun, blue-white stars are hotter.
What is Rigel’s luminosity?
Located 863 light-years away, Rigel’s computed luminosity is an incredible 120,000 times the brightness of our sun. Its surface temperature is also far hotter than the sun, around 21,000 degrees Fahrenheit (11,600 degrees Celsius). Compare that to 10,000 degrees F (5,500 degrees C) for the sun.
What is the temperature of Betelgeuse?
Is Sirius in Milky Way?
Orion and the winter stars shine in the Milky Way, with Sirius above the trees at lower right.
What kind of star is Procyon B?
A binary star system, Procyon consists of a white-hued main-sequence star of spectral type F5 IV–V, designated component A, in orbit with a faint white dwarf companion of spectral type DQZ, named Procyon B. The pair orbit each other with a period of 40.84 years and an eccentricity of 0.4.
Is Rigel bigger than Sun?
Rigel, a blue supergiant star, is 18 times more massive than the sun and 74 times its size. At a distance of 860 light years, Rigel is big enough and close enough to have its diameter measured directly.
What is the luminosity of Rigel?
Rigel has a spectral type of B8Ia, a surface temperature of 11,000° Kelvin and a luminosity 66,000 times the Sun. It has a mass of 17 solar masses and a diameter 78 times the Sun.
How big is Rigel?
– Rigel A: This is a blue-white supergiant with an absolute magnitude of -7.84. The appellation “supergiant” is no exaggeration, either, as Rigel A has roughly 24 times the mass of the Sun, it shines 120,000 brighter, and is 80 times as big as the result of it swelling up, having depleted its hydrogen fuel supply.
How old is Rigel?
Rigel is only around 8 million years old and has already exhausted the supply of hydrogen in its core. Our sun which is already 4.5 billion years old will continue to fuse hydrogen in its core for another 5 or 6 billion years.