BY: Adam Battey
Period 3


Betelgeuse is a star that is 650 light years from Earth, and is contained within the constellation Orion. Betelgeuse is a very distinct red, and one of the few stars bright enough to clearly make out their color. Betelgeuse has a solar mass of 7.7(one solar mass is equal to 1.9891 × 10^30 kilograms). Betelgeuse is 3,500 K on the surface. Some characteristics of Betelgeuse are:

-it is a semi-regular variable star, meaning that it's apparent magnitude fluctuates between .2 and 1.2

-apparent magnitude is the magnitude of a celestial object as it is actually measured from the earth.

-this is the widest range of any first magnitude star.

-the star is classified as a red supergiant of the spectral type M2lab

-it is one of the largest and most luminous observable stars

-it has a surface gravity of -.5 cgs (centimeter-grams-seconds)

-has a rotation of 5 km/s(kilometers per second)

-has a luminosity of 90,000-150,000 Solar luminosity(1 solar luminosity is 3.846×1026)

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