Alpha Orionis
E557727
Alpha Orionis is the Bayer designation for Betelgeuse, a prominent red supergiant star in the constellation Orion known for its brightness and variability.
Observed surface forms (1)
| Surface form | Occurrences |
|---|---|
| α Orionis | 1 |
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf | star ⓘ |
| alsoKnownAs |
Betelgeuse
NERFINISHED
ⓘ
α Orionis NERFINISHED ⓘ |
| exhibitsMassLoss | true ⓘ |
| formsPartOfAsterism | Orion constellation figure ⓘ |
| greatDimmingCause | combination of dust formation and surface changes ⓘ |
| hasAngularDiameter | about 0.04 arcseconds ⓘ |
| hasApparentMagnitudeV | about 0.0 to +1.6 ⓘ |
| hasAverageApparentMagnitudeV | about +0.5 ⓘ |
| hasBayerDesignation | α Orionis NERFINISHED ⓘ |
| hasCircumstellarDust | true ⓘ |
| hasColorIndexBminusV | +1.85 ⓘ |
| hasCulturalSignificance | featured in many mythologies and modern media ⓘ |
| hasDeclination | +07° 24′ 25.4″ ⓘ |
| hasDistanceFromEarth |
about 170 parsecs
ⓘ
about 550 light-years ⓘ |
| hasEffectiveTemperature | about 3500 K ⓘ |
| hasEquinox | J2000.0 ⓘ |
| hasEstimatedRemainingLifetime | on the order of 10^5 years ⓘ |
| hasExtendedAtmosphere | true ⓘ |
| hasFlamsteedDesignation | 58 Orionis NERFINISHED ⓘ |
| hasLuminosity | about 100,000 times solar luminosity ⓘ |
| hasMass | about 10–20 solar masses ⓘ |
| hasMassLossRate | about 1–2 × 10^-6 solar masses per year ⓘ |
| hasMetallicityFeH | approximately solar ⓘ |
| hasParallax | about 4.51 mas ⓘ |
| hasPrimaryVariabilityPeriod | about 400 days ⓘ |
| hasProperMotionInDec | about 9.56 mas/yr ⓘ |
| hasProperMotionInRA | about 24.95 mas/yr ⓘ |
| hasRadialVelocity | about +21 km/s ⓘ |
| hasRadius | about 700–1000 solar radii ⓘ |
| hasRightAscension | 05h 55m 10.3053s ⓘ |
| hasSecondaryVariabilityPeriod | about 2000 days ⓘ |
| hasSpectralType | M1–M2 Ia–ab ⓘ |
| hasStellarWind | true ⓘ |
| hasSurfaceConvectionCells | true ⓘ |
| hasVariableType | semiregular variable ⓘ |
| isBrightestStarInConstellation | Orion NERFINISHED ⓘ |
| isEvolvedStar | true ⓘ |
| isExpectedToEndAs | core-collapse supernova ⓘ |
| isIrregularInShape | true ⓘ |
| isNorthernHemisphereWinterStar | true ⓘ |
| isOneOfBrightestStarsInSky | true ⓘ |
| isRedSupergiantPhase | true ⓘ |
| isShoulderOfOrion | true ⓘ |
| isVisibleToNakedEye | true ⓘ |
| locatedInConstellation | Orion NERFINISHED ⓘ |
| wasObservedToDimUnusually | 2019–2020 great dimming event ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
α Orionis