Southern Pole Star (South Star)
Currently, there is no South Star as useful as Polaris. Sigma Octantis is the naked-eye star closest to the south Celestial pole, but at apparent magnitude 5.45 it is too faint to serve as a useful pole star. Its angular separation from the pole is about 1° (as of 2000). The Southern Cross constellation functions as an approximate southern pole constellation, by pointing to where a southern pole star would be. At the equator it is possible to see both Polaris and the Southern Cross.
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