Alpha Centauri

E439488
binary star system exoplanet main-sequence star multiple star system red dwarf star star system triple star system

Alpha Centauri is the closest star system to the Solar System, consisting of a triple-star arrangement that includes the Sun-like stars Alpha Centauri A and B and the red dwarf Proxima Centauri.

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Observed surface forms (8)

Surface form Occurrences
Proxima Centauri 3
Alpha Centauri A 1
Alpha Centauri B 1

Statements (53)

Predicate Object
instanceOf binary star system ⓘ
exoplanet ⓘ
main-sequence star ⓘ
main-sequence star ⓘ
multiple star system ⓘ
red dwarf ⓘ
star ⓘ
star ⓘ
star ⓘ
star system ⓘ
triple star system ⓘ
apparentMagnitude −0.27 ⓘ
constellation Centaurus NERFINISHED ⓘ
declination about −60° 50′ ⓘ
distanceFromSun about 4.24 light-years ⓘ
about 4.37 light-years ⓘ
eccentricity about 0.52 ⓘ
hasComponent Alpha Centauri A NERFINISHED ⓘ
Alpha Centauri B NERFINISHED ⓘ
Proxima Centauri NERFINISHED ⓘ
hasCulturalSignificanceIn navigation in Southern Hemisphere ⓘ
hasExoplanet Proxima Centauri b NERFINISHED ⓘ
isBinarySubsystem Alpha Centauri AB NERFINISHED ⓘ
isBrightestStarSystemIn constellation Centaurus NERFINISHED ⓘ
isInHabitableZoneOf Proxima Centauri NERFINISHED ⓘ
isNearestStarSystemTo Solar System NERFINISHED ⓘ
isNearestStarTo Sun NERFINISHED ⓘ
isNotVisibleFrom most of Northern Hemisphere ⓘ
isVisibleFrom Southern Hemisphere NERFINISHED ⓘ
luminosity about 0.5 times solar luminosity ⓘ
about 1.5 times solar luminosity ⓘ
mass about 0.12 solar masses ⓘ
about 0.9 solar masses ⓘ
about 1.1 solar masses ⓘ
orbitalCompanion Alpha Centauri A NERFINISHED ⓘ
Alpha Centauri B NERFINISHED ⓘ
orbitalPeriod about 79.9 years ⓘ
orbitalPeriodAroundAlphaCentauriAB hundreds of thousands of years (approximate) ⓘ
orbits Proxima Centauri NERFINISHED ⓘ
orbitsCommonBarycenterWith Alpha Centauri AB NERFINISHED ⓘ
otherName Rigil Kent NERFINISHED ⓘ
Rigil Kentaurus NERFINISHED ⓘ
Toliman NERFINISHED ⓘ
partOf Milky Way NERFINISHED ⓘ
radius about 0.14 solar radii ⓘ
about 0.86 solar radii ⓘ
about 1.2 solar radii ⓘ
rightAscension about 14h 39m ⓘ
semiMajorAxis about 23.4 AU ⓘ
similarTo Sun NERFINISHED ⓘ
spectralType G2V ⓘ
K1V ⓘ
M5.5Ve ⓘ

Referenced by (14)

Full triples — surface form annotated when it differs from this entity's canonical label.

Project Longshot → targetStarSystem → Alpha Centauri ⓘ
Local Fluff → isNear → Alpha Centauri ⓘ
Centaurus constellation region → contains → Alpha Centauri ⓘ
Centaurus constellation region → containsBrightStar → Alpha Centauri ⓘ
this entity surface form: Alpha Centauri A
Centaurus constellation region → containsBrightStar → Alpha Centauri ⓘ
this entity surface form: Alpha Centauri B
Centaurus constellation region → containsBrightStar → Alpha Centauri ⓘ
this entity surface form: Proxima Centauri
Centaurus → containsStar → Alpha Centauri ⓘ
Centaurus → containsStar → Alpha Centauri ⓘ
this entity surface form: Proxima Centauri
Centaurus → containsNearestStarSystemToSun → Alpha Centauri ⓘ
this entity surface form: Proxima Centauri
Centaurus → containsNearestSunLikeStarSystem → Alpha Centauri ⓘ
this entity surface form: Alpha Centauri A and B
Na'vi → homeSystem → Alpha Centauri ⓘ
this entity surface form: Alpha Centauri system
Alpha Centauri Expeditions (ACE) → operatesIn → Alpha Centauri ⓘ
subject surface form: Alpha Centauri Expeditions
this entity surface form: Alpha Centauri star system
Alpha Centauri Expeditions (ACE) → homeSystem → Alpha Centauri ⓘ
subject surface form: Alpha Centauri Expeditions
Pandora → locatedInFictionalGalaxy → Alpha Centauri ⓘ
this entity surface form: Alpha Centauri system