(Alpha Crucis B) is the Bayer Classification for the star. The Bayer Classification was created by Johann Bayer in the early nineteenth century. The brightest star in the constellation is normally given the Alpha designation although there are exceptions such as Pollux which is Beta Geminorum.
More details on objects' alternative names can be found at Star Names .
The location of the main sequence star in the night sky is determined by the Right Ascension (R.A.) and Declination (Dec.), these are equivalent to the Longitude and Latitude on the Earth. The Right Ascension is how far expressed in time (hh:mm:ss) the star is along the celestial equator. If the R.A. is positive then its eastwards. The Declination is how far north or south the object is compared to the celestial equator and is expressed in degrees. For Acrux B, the location is 12h 26m 35.94 and -63 ° 05` 56.6 .
Acrux B has a spectral type of B1V. This means the star is a blue main sequence star. Acrux B lies at a distance of 320.71 light years away from our Sun and our planet Earth or to put it another way, 98.33 parsecs away from the Sun.
Acrux B has an apparent magnitude of 0.77 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. Magnitude, whether it be apparent/visual or absolute magnitude is measured by a number, the smaller the number, the brighter the Star is. Our own Sun is the brightest star and therefore has the lowest of all magnitudes, -26.74. A faint star will have a high number.
Acrux B is an estimated 320.71 light years from our Solar System (Earth and Sun). It would take a spaceship 320.71 years travelling at the speed of light to get there. We don't have a space ship that can travel that distance or at that speed yet.
|Primary / Proper / Traditional Name||Acrux B|
|Alternative Names||Alpha Crucis B|
|Constellation's Main Star||No|
|Multiple Star System||Yes|
|Star Type||main sequence Dwarf Star|
|Visual / Apparent Magnitude||0.77|
|Naked Eye Visible||Yes - Magnitudes|
|Right Ascension (R.A.)||12h 26m 35.94|
|Declination (Dec.)||-63 ° 05` 56.6|
|Distance from the Sun / Earth||320.71 Light Years|
|Associated / Clustered Stars||Acrux|
|Radius (x the Sun)||0.00|
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