Is the Sirius the hottest star?

Sirius is classified by astronomers as an “A” type star. That means it’s a much hotter star than our sun; its surface temperature is about 17,000 degrees Fahrenheit (9,400 Celsius) in contrast to our sun’s 10,000 degrees F (5,500 C).

Is the Sun hotter than Sirius B?

It is twice as massive as the Sun and has a surface temperature of 18,000degrees Fahrenheit (10,000 degrees C). The companion, called Sirius B, was known to be much hotter.It is the scorching ember of a Sun-like star now called a white dwarf, and it’sthe nearest of its kind.

How does Sirius compare to the Sun?

Sirius A is about twice as massive as the Sun ( M ☉) and has an absolute visual magnitude of +1.42. It is 25 times as luminous as the Sun, but has a significantly lower luminosity than other bright stars such as Canopus or Rigel.

What type of Sun is the hottest?

Eta Carinae could be as large as 180 times the radius of the Sun, and its surface temperature is 36,000-40,000 Kelvin. Just for comparison, 40,000 Kelvin is about 72,000 degrees F. So it’s the blue hypergiants, like Eta Carinae, which are probably the hottest stars in the Universe.

Is Rigel hotter than Sirius?

It is 1,400 light years away. It is 120,000 times brighter than the Sun. So, Rigel is almost 4,800 times brighter than Sirius but is it some 160 times further away.

Is Sirius A brighter than the sun?

As seen from Earth, Sirius is the brightest object in the night sky. Sometimes known as the Dog Star, it is located in the constellation Canis Major. Sirius has a luminosity 25.4 times greater than the sun, but, because it is 8.6 light years away, its apparent brightness is 12 billion times less than that of the sun.

Is Sirius cooler than the sun?

Sirius is both hotter and bigger than the Sun. So every square inch of its surface emits more light than the Sun does, and there’s a lot more surface to radiate light into space. When you add it all up, Sirius emits about two dozen times more light than the Sun does.