Acrux (Alpha Crucis) is not a single star, what we know of it makes two stars visible (A1 and A2). Both stars are Class B, pushing Class O (blue-white to blue). A1 is a B0.5IV (B=blue-white class, 0.5=temperature range {0 being hottest, 9 being coolest}, IV puts A1 in the sub-giant range. A2 is a B1V, the same B class, however it is cooler than A1 and much smaller, V-making it a dwarf.
So, B is the color from the Harvard Spectral Classification. The number is a subdivision of the Harvard Spectral Classification and addresses temperature and luminosity. The Roman numeral is the Yerkes Spectral Classification and addresses the size and luminosity (broken into 8 divisions from hypergiants to white dwarfs).
Acrux is blue in color
Acrux is over 9000 years old
Acrux is the brightest star in the constellation Crux.It has an apparent magnitude of +0.77It has an absolute magnitude of -4.14
Acrux is the brightest star in constellation Crux. It is a multi star system, but only two stars are visually distinguishable.They are approximately 14 and 10 times larger than our Sun.
Crux - the Southern Cross. The Bethlehem Star could have been Alpha Crucis (Acrux).
Acrux is a type B star and will have a temperature of between 10,000 and 30,000 K
Acrux is blue in color
Acrux is over 9000 years old
Acrux is the brightest star in the constellation Crux.It has an apparent magnitude of +0.77It has an absolute magnitude of -4.14
Acrux is the brightest star in constellation Crux. It is a multi star system, but only two stars are visually distinguishable.They are approximately 14 and 10 times larger than our Sun.
Crux - the Southern Cross. The Bethlehem Star could have been Alpha Crucis (Acrux).
Acrux is actually a binary star system, comprising of at least three stars. The largest (α Cru 1) has a mass of about 14 times that of the Sun and is 25,000 times more luminous.
Acrux (Alpha Crucis) is the brightest star in constellation Crux.
blue
People in Bethlehem
over 9000 years
en yo mamas house