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.
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
A-type main-sequence star
ⓘ
rapidly rotating star ⓘ star ⓘ |
| age_Gyr | 1.2 ⓘ |
| apparentMagnitudeV | 0.77 ⓘ |
| bayerDesignation | Alpha Aquilae NERFINISHED ⓘ |
| belongsToAsterism | Summer Triangle NERFINISHED ⓘ |
| colorIndexBMinusV | 0.22 ⓘ |
| constellation | Aquila NERFINISHED ⓘ |
| 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 NERFINISHED ⓘ |
| hdNumber | HD 187642 NERFINISHED ⓘ |
| hemisphereProminence | northern summer sky ⓘ |
| hipparcosNumber | HIP 97649 NERFINISHED ⓘ |
| hrNumber | HR 7557 NERFINISHED ⓘ |
| 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
NERFINISHED
ⓘ
Hipparcos satellite NERFINISHED ⓘ Very Large Telescope Interferometer NERFINISHED ⓘ |
| otherComponentOf |
Deneb
NERFINISHED
ⓘ
Summer Triangle NERFINISHED ⓘ Vega NERFINISHED ⓘ |
| partOf | Summer Triangle NERFINISHED ⓘ |
| 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
NERFINISHED
ⓘ
Southern Hemisphere NERFINISHED ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.