Octans

Octans
Constellation
Octans
AbbreviationOct
GenitiveOctantis
Pronunciationz/, genitive s/
Symbolismthe Octant
Right ascension 22h
Declination−90°
QuadrantSQ4
Area291 sq. deg. (50th)
Main stars3
Bayer/Flamsteed
stars
27
Stars with planets3
Stars brighter than 3.00m0
Stars within 10.00 pc (32.62 ly)1
Brightest starν Oct (3.73m)
Messier objects0
Meteor showers0
Bordering
constellations
Tucana
Indus
Pavo
Apus
Chamaeleon
Mensa
Hydrus
Visible at latitudes between +0° and −90°.
Best visible at 21:00 (9 p.m.) during the month of October.
Circumpolar.

Octans z/ 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. The constellation was devised by French astronomer Nicolas Louis de Lacaille in 1752, and it remains one of the 88 modern constellations.

History and mythology

Octans was one of 14 constellations created by French astronomer Nicolas Louis de Lacaille during his expedition to the Cape of Good Hope, and was originally named l’Octans de Reflexion (“the reflecting octant”) in 1752, after he had observed and catalogued almost 10,000 southern stars during a two-year stay at the Cape of Good Hope. He devised fourteen new constellations in uncharted regions of the Southern Celestial Hemisphere not visible from Europe. All but one honoured instruments that symbolised the Age of Enlightenment.[a][1]

It was part of his catalogue of the southern sky, the Coelum Australe Stelliferum, which was published posthumously in 1763. In Europe, it became more widely known as Octans Hadleianus, in honor of English mathematician John Hadley, who invented the octant in 1730. There is no real mythology related to Octans, partially due to its faintness and relative recentness, but mostly because of its extreme southerly latitude.[2]

Other Languages
العربية: الثمن (كوكبة)
asturianu: Octans
azərbaycanca: Oktant (bürc)
Bân-lâm-gú: Pat-hun-gî-chō
беларуская: Актант (сузор’е)
беларуская (тарашкевіца)‎: Актант (сузор’е)
corsu: Octans
dansk: Oktanten
Ελληνικά: Οκτάς
español: Octans
français: Octant
galego: Octans
客家語/Hak-kâ-ngî: Nàm-khi̍t-chho
한국어: 팔분의자리
Bahasa Indonesia: Octans
Jawa: Octans
Lëtzebuergesch: Octans
lietuvių: Oktantas
македонски: Октант (соѕвездие)
Bahasa Melayu: Oktan (buruj)
Mìng-dĕ̤ng-ngṳ̄: Nàng-gĭk-cô̤
norsk: Oktanten
norsk nynorsk: Oktanten
oʻzbekcha/ўзбекча: Oktant
português: Octans
Scots: Octans
Simple English: Octans
slovenčina: Oktant (súhvezdie)
slovenščina: Oktant (ozvezdje)
српски / srpski: Октант (сазвежђе)
srpskohrvatski / српскохрватски: Oktant (zviježđe)
suomi: Oktantti
svenska: Oktanten
українська: Октант (сузір'я)
اردو: ثمن
Tiếng Việt: Nam Cực (chòm sao)
Winaray: Octans
粵語: 南極座
中文: 南极座