Blue
All three members of this 'triple-star' system ... Alpha Centauri, Beta Centauri, and Proxima Centauri ... are listed as being located roughly 4.2 light-years from our solar system.
Beta Centauri (Hadar or Agena) is the second brightest star in the constellation Centaurus and the tenth brightest star in the night sky.It has a spectral class of B1 and it is a blue-white giant star.
There is no single star called "alpha" or "beta". The brightest stars (usually) in each constellation are called "alpha" and "beta", followed by the Latin genitiv of the constellation; for example, "alpha centauri", "beta centauri", "alpha orionis", "alpha cruxis", etc.
The term "Beta" isn't a star name -- it's a prefix that indicates that, of a group of stars, which one this one is. So there are Alpha cetauri, Beta Centauri, Gamm Centauri, etc...
Alpha Ursae Majoris (Dubhe) and Beta Ursae Majoris (Merak), which point to Polaris. (Northern Hemisphere)Alpha Centauri and Beta Centauri, which point to the Southern Cross. (Southern Hemisphere)
There are no stars that I am aware of named "SMN". The nearest star to Earth is Proxima Centauri, and the next-closest stars are the binary pair Alpha Centauri and Beta Centauri.
The nearest other star is Proxima Centauri, at 4.2 light years away. Beyond that, Alpha Centauri and Beta Centauri are 4.5 LY away.
Alpha Centauri, Beta Centauri, and Proxima Centauri. Of the three, Proxima is the closest to us, hence the name (which means "nearest"). There is some dispute as to whether the system is actually a trinary star system, or a binary star system with Proxima as a relatively close neighbor that doesn't significantly interact with Alpha and Beta. As a result, the system is sometimes referred to as "AB Centauri", which designates a binary system.
According to recent estimates, around 350 light years or 107 parsecs
B Centauri (B Cen) is a star in the constellation Centaurus.It is an orange giant with a spectral class of K3.
Beta Centauri, also known as Hadar, is a binary star system consisting of two stars orbiting around a common center of mass. The shape of individual stars in the system is approximately spherical, as they are massive celestial bodies that undergo nuclear fusion to produce energy.
Alpha Centauri, Beta Centauri, and Proxima Centauri are the three main stars that make up the Centaurus constellation. Alpha Centauri is the closest star system to Earth, while Proxima Centauri is the closest known star to our solar system.