Celestial Atlas
Norma <—     Octans: The Mariner's Octant     —> Ophiuchus
(possessive form Octantis, abbreviation Oct)
Hold the cursor over any Greek letter shown in the text to see its English transliteration

One of fourteen southern constellations created by Nicolas Louis de Lacaille in 1756, as a result of his observations of ten thousand southern stars; but not introduced to the public until the posthumous publication of his work, in 1763.


Illustration of Octans
From Bode's 1801 Uranographia
(Image Credit and © Tartu Observatory Virtual Museum; used by permission)
Portion of Bode's Uranographia showing the region near Octans

Map of Octans
Modified version of Wikimedia Commons map by Torsten Bronger


Stars in Octans

     Stars which have common names often have multiple names, so the common names shown (if any) cannot be considered authoritative. Right ascension and declination are given in 2000.0 coordinates.

α Oct

β Oct

γ Oct

δ Oct

ε Oct


Celestial Atlas
Norma <—     Octans: The Mariner's Octant     —> Ophiuchus