Octans

Octans contains the south celestial pole, the southern counterpart of Polaris's position in Ursa Minor. However, there is no bright star near the south pole; Sigma Octantis, the closest naked-eye star, is barely visible at magnitude 5.4.

Location in the Sky

When to Observe

Octans is best observed during October. It is located in the SQ4 quadrant and is primarily visible from the southern hemisphere. The constellation contains 3 main stars forming its asterism, with 23 Bayer/Flamsteed designated stars in total. Its brightest star is Nu Octantis.

Mythology & History

Octans was introduced by Nicolas-Louis de Lacaille in the 1750s, representing the octant, a navigational instrument that preceded the sextant. Its most significant feature is its location: it contains the south celestial pole, though no bright star marks the position.