Betelgeuse is a semiregular variable star located in the constellation Orion.
It is the second brightest star in the constellation and the ninth brightest star in the night sky.
It has an apparent magnitude of 0.58 (Var 0.3 -> 1.2) and an absolute magnitude of -5.14.
See related link for more information.
Betelgeuse varies in brightness a bit, but it's around #8 in brightness.
-6.02
Brightness is a function of a stars luminosity as observed from Earth. So our Sun is the brightest. Vega has an apparent magnitude of: 0.03 Betelgeuse has an apparent magnitude of 0.42 So, in apparent magnitude, Vega is brighter.
Answer When Bayer prepared his catalogue, there was no way to measure stellar brightness precisely. Traditionally, the stars were assigned to one of six magnitude classes, and Bayer's catalog lists all the first-magnitude stars, followed by all the second-magnitude stars, and so on. However within each magnitude class, there was no attempt to arrange stars by relative brightness. For example, in the Orion constellation, Bayer first designated the two 1st-magnitude stars, Betelgeuse and Rigel, as Alpha and Beta, with Betelgeuse (the shoulder) coming ahead of Rigel (the foot), even though the latter is the brighter.Also worth mentioningis that Betelgeuse is a semiregular variable star, and sometimes IS brighter than Rigel.So, it is possible that Betelgeuse was mistakenly classified as the brightest because it could have been experiencing an increase in brightness at that time.
betelgeuse
Betelgeuse varies in brightness a bit, but it's around #8 in brightness.
-6.02
Brightness is a function of a stars luminosity as observed from Earth. So our Sun is the brightest. Vega has an apparent magnitude of: 0.03 Betelgeuse has an apparent magnitude of 0.42 So, in apparent magnitude, Vega is brighter.
Answer When Bayer prepared his catalogue, there was no way to measure stellar brightness precisely. Traditionally, the stars were assigned to one of six magnitude classes, and Bayer's catalog lists all the first-magnitude stars, followed by all the second-magnitude stars, and so on. However within each magnitude class, there was no attempt to arrange stars by relative brightness. For example, in the Orion constellation, Bayer first designated the two 1st-magnitude stars, Betelgeuse and Rigel, as Alpha and Beta, with Betelgeuse (the shoulder) coming ahead of Rigel (the foot), even though the latter is the brighter.Also worth mentioningis that Betelgeuse is a semiregular variable star, and sometimes IS brighter than Rigel.So, it is possible that Betelgeuse was mistakenly classified as the brightest because it could have been experiencing an increase in brightness at that time.
betelgeuse
No. Betelgeuse does not affect us.
No, Betelgeuse is a red star.
No. Betelgeuse is a single star.
No, the name Betelgeuse comes from Arabic.
Betelgeuse is a supergiant star.
No, Betelgeuse is a red giant star.
No. Betelgeuse is in Orion.