Tags: Star.
Sigma Octantis (σ Oct σ Octantis) is a magnitude 5.42 star in the constellation Octans most notable for being the current South Star. Sigma Octantis is approximately 270 light years from Earth and is classified as a giant with a spectral type of F0 III. It is a Delta Scuti variable with magnitude varying by about 0.03 magnitudes over 2.3 hours.Sigma Octantis is the dimmest star to be represented on a national flag.
