Achernar
E552642
Achernar is a bright, rapidly rotating blue-white star and the ninth-brightest star in the night sky, marking the end of the constellation Eridanus.
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
Be star
ⓘ
main-sequence star ⓘ star ⓘ |
| belongsTo |
Milky Way
NERFINISHED
ⓘ
local spiral arm of the Milky Way ⓘ |
| hasAlternativeName | Alpha Eridani NERFINISHED ⓘ |
| hasApparentMagnitude | 0.46 ⓘ |
| hasApparentMagnitudeV | 0.46 ⓘ |
| hasBayerDesignation | α Eridani NERFINISHED ⓘ |
| hasCatalogIdentifier |
HD 10144
NERFINISHED
ⓘ
HIP 7588 NERFINISHED ⓘ HR 472 NERFINISHED ⓘ |
| hasColor | blue-white ⓘ |
| hasCompanion | Achernar B NERFINISHED ⓘ |
| hasCompanionSeparation | about 12 AU ⓘ |
| hasCompanionSpectralType | A-type main-sequence star ⓘ |
| hasConstellation | Eridanus NERFINISHED ⓘ |
| hasDeclination | −57° 14′ 12.3″ ⓘ |
| hasDistanceFromEarth |
about 139 light-years
ⓘ
about 43 parsecs ⓘ |
| hasEffectiveTemperature | about 15,000 K ⓘ |
| hasEmissionLines | hydrogen Balmer lines ⓘ |
| hasEquatorialToPolarRadiusRatio | about 1.5 ⓘ |
| hasFlamsteedDesignation | 39 Eridani NERFINISHED ⓘ |
| hasIAUNameStatus | approved star name ⓘ |
| hasLuminosity | about 3,000 times solar luminosity ⓘ |
| hasMass | about 6.7 solar masses ⓘ |
| hasParallax | 22.68 mas ⓘ |
| hasProperMotionDec | −40.08 mas/yr ⓘ |
| hasProperMotionRA | +88.02 mas/yr ⓘ |
| hasRadialVelocity | +16.7 km/s ⓘ |
| hasRadius |
about 5.8 solar radii (polar)
ⓘ
about 7.3 solar radii (equatorial) ⓘ |
| hasRightAscension | 01h 37m 42.845s ⓘ |
| hasRotationalVelocity | about 250 km/s ⓘ |
| hasRotationPeriod | about 2 days ⓘ |
| hasSpectralType | B6 Vep ⓘ |
| hasStellarClassification | B-type main-sequence star ⓘ |
| hasStellarWind | strong ⓘ |
| hasTraditionalNameOrigin | Arabic ⓘ |
| isDifficultToSeeFrom | most of the Northern Hemisphere ⓘ |
| isOblate | true ⓘ |
| isPartOfSystem | Achernar binary system NERFINISHED ⓘ |
| isRankedByBrightness | ninth-brightest star in the night sky ⓘ |
| isRapidlyRotating | true ⓘ |
| isUsedFor | celestial navigation ⓘ |
| isVisibleFrom | Southern Hemisphere NERFINISHED ⓘ |
| marks | end of the constellation Eridanus ⓘ |
| nameMeaning | end of the river ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.