Acrux, also known as Alpha Crucis is the brightest star of the constellation of Crux, the Southern Cross.
It is a double star, easily splittable in a small telescope. The separation is 3.6 arc-seconds.
The Acrux multiple star system is 321 light-years from the Earth. Both are massive Class B stars many thousands of times brighter than the Sun and they orbit each other over a period of 1500 years.
All images © R.Powell