Altair

E572585

Altair is a bright, nearby A-type main-sequence star in the constellation Aquila and one of the three stars forming the prominent Summer Triangle asterism.

All labels observed (1)

Label Occurrences
Altair canonical 11

How this entity was disambiguated

Statements (48)

Predicate Object
instanceOf A-type main-sequence star ⓘ
rapidly rotating star ⓘ
star ⓘ
age_Gyr 1.2 ⓘ
apparentMagnitudeV 0.77 ⓘ
bayerDesignation Alpha Aquilae ⓘ
belongsToAsterism Summer Triangle ⓘ
linked to: SummerTriangle
colorIndexBMinusV 0.22 ⓘ
constellation Aquila ⓘ
declination_J2000 +08°52′06″ ⓘ
distanceFromEarth_ly 16.7 ⓘ
distanceFromEarth_pc 5.13 ⓘ
effectiveTemperature_K 7550 ⓘ
equatorialCoordinatesEpoch J2000.0 ⓘ
equatorialToPolarRadiusRatio ~1.25 ⓘ
flamsteedDesignation 53 Aquilae ⓘ
galacticPopulation thin disk ⓘ
hasExoplanetsDetected no confirmed planets as of 2024 ⓘ
hasProperName Altair ⓘ
hdNumber HD 187642 ⓘ
hemisphereProminence northern summer sky ⓘ
hipparcosNumber HIP 97649 ⓘ
hrNumber HR 7557 ⓘ
isBrightStar true ⓘ
luminosity_solar 10.6 ⓘ
mass_solar 1.8 ⓘ
metallicity_FeH −0.24 ⓘ
nameEtymology from Arabic "al-nasr al-ṭāʼir" meaning "the flying eagle" ⓘ
notableFeature first main-sequence star whose surface was imaged interferometrically ⓘ
oblateness significant ⓘ
observedBy CHARA Array ⓘ
Hipparcos satellite ⓘ
Very Large Telescope Interferometer ⓘ
otherComponentOf Deneb ⓘ
Summer Triangle ⓘ
linked to: SummerTriangle

Vega ⓘ
partOf Summer Triangle ⓘ
linked to: SummerTriangle
projectedRotationalVelocity_kmPerS ~240 ⓘ
radius_solar_equatorial 1.9 ⓘ
radius_solar_polar 1.6 ⓘ
rankByBrightness among 20 brightest stars in night sky ⓘ
rightAscension_J2000 19h50m47s ⓘ
rotationPeriod_hours ~9 ⓘ
spectralType A7 V ⓘ
traditionalAssociation Eagle ⓘ
variabilityType mild, not a major variable star ⓘ
visibleFrom Northern Hemisphere ⓘ
Southern Hemisphere ⓘ

How these facts were elicited

Referenced by (11)

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