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Octans is a faint constellation located in the deep Southern Sky. Its name is Latin for the eighth part of a circle, but it is named after the octant , a navigational instrument . Devised by French astronomer Nicolas Louis de Lacaille in 1752, Octans remains one of the 88 modern constellations .
Epsilon Octantis, Latinized from ε Octantis, is a star in the southern circumpolar constellation of Octans. It is a faintly visible to the naked eye with an apparent visual magnitude of about 5. The annual parallax shift of 11.22 [1] mas yields a distance estimate of around 291 light years.
Zeta Octantis, Latinized from ζ Octantis, is a solitary, [16] yellowish-white hued star located in the southern circumpolar constellation Octans.It has an apparent magnitude of 5.42, [2] making it faintly visible to the naked eye under ideal conditions.
ν Octantis, Latinised as Nu Octantis, is a star in the constellation of Octans. Unusually, it is the brightest star in this faint constellation at apparent magnitude +3.7. [2] It is a spectroscopic binary [9] star with a period around 2.9 years. Parallax measurements place it at 22.1 parsecs (72 ly) from Earth. [7]
Alpha Octantis is a binary star [12] system in the constellation of Octans.The name is Latinized from α Octantis. Despite being labeled the "alpha" star by Lacaille, it is not the brightest star in the constellation—that title belongs to Nu Octantis.
Star density maps of the Gaia Catalogue of Nearby Stars.The Sun is located at the centre of both maps. The regions with higher density of stars are shown; these correspond with known star clusters (Hyades and Coma Berenices) and moving groups.
Tau Octantis, Latinized from τ Octantis, is a solitary [11] star in the southern circumpolar constellation Octans. It has an apparent magnitude of 5.50, [2] allowing it to be faintly seen with the naked eye. The object is located at a distance of 480 light years [1] but is receding with a heliocentric radial velocity of 31 km/s. [5]
θ Octantis, Latinized as Theta Octantis, is a single [9] star in the southern circumpolar constellation of Octans, near the constellation border with Hydrus.It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.78. [2]