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.

All labels observed (2)

Label Occurrences
Alpha Orionis canonical 6
α Orionis 5

How this entity was disambiguated

Statements (48)

Predicate Object
instanceOf star ⓘ
alsoKnownAs Betelgeuse ⓘ
α Orionis ⓘ
linked to: Alpha Orionis
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 ⓘ
linked to: Alpha Orionis
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 ⓘ
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 ⓘ
isEvolvedStar true ⓘ
isExpectedToEndAs core-collapse supernova ⓘ
isIrregularInShape true ⓘ
isNorthernHemisphereWinterStar true ⓘ
isOneOfBrightestStarsInSky true ⓘ
isRedSupergiantPhase true ⓘ
isShoulderOfOrion true ⓘ
isVisibleToNakedEye true ⓘ
locatedInConstellation Orion ⓘ
wasObservedToDimUnusually 2019–2020 great dimming event ⓘ

How these facts were elicited

Referenced by (11)

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

Betelgeuse → variableStarDesignation → Alpha Orionis ⓘ
Betelgeuse → BayerDesignation → α Orionis ⓘ
linked to: Alpha Orionis
Alpha Orionis → alsoKnownAs → α Orionis ⓘ
linked to: Alpha Orionis
Alpha Orionis → hasBayerDesignation → α Orionis ⓘ
linked to: Alpha Orionis
HR 2061 → alsoKnownAs → Alpha Orionis ⓘ
HR 2061 → bayerDesignation → Alpha Orionis ⓘ
HD 39801 → alsoKnownAs → Alpha Orionis ⓘ
HD 39801 → bayerDesignation → α Orionis ⓘ
linked to: Alpha Orionis
SAO 113271 → otherDesignation → Alpha Orionis ⓘ
SAO 113271 → otherDesignation → α Orionis ⓘ
linked to: Alpha Orionis
SAO 113271 → bayerDesignation → Alpha Orionis ⓘ