α Herculis
E922780
giant star
main-sequence star
multiple star system
red giant star
semiregular variable star
star system in Hercules
stellar system
α Herculis is a bright multiple star system in the constellation Hercules, dominated by a luminous red giant visible to the naked eye.
Observed surface forms (4)
| Surface form | Occurrences |
|---|---|
| α Herculis A | 0 |
| α Herculis B | 0 |
| α Herculis C | 0 |
| Rasalgethi | 0 |
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
giant star
ⓘ
main-sequence star ⓘ multiple star system ⓘ red giant star ⓘ semiregular variable star ⓘ star system in Hercules ⓘ stellar system ⓘ |
| etymology | from Arabic meaning “the kneeler’s head” ⓘ |
| hasApparentMagnitudeV |
about 3.0–4.0
ⓘ
about 3.5 ⓘ |
| hasBayerDesignation | α Herculis NERFINISHED ⓘ |
| hasComponent |
α Herculis A
NERFINISHED
ⓘ
α Herculis B NERFINISHED ⓘ α Herculis C NERFINISHED ⓘ |
| hasDeclination_J2000 | +14° 23′ (approx) ⓘ |
| hasDistanceFromEarth_ly | about 360 ⓘ |
| hasDistanceFromEarth_pc | about 110 ⓘ |
| hasFlamsteedDesignation | 64 Herculis NERFINISHED ⓘ |
| hasGalacticLatitude | +23° (approx) ⓘ |
| hasGalacticLongitude | 29° (approx) ⓘ |
| hasLuminosity_solar | about 10,000 ⓘ |
| hasMass_solar | about 2–3 ⓘ |
| hasOrbitalCompanions | α Herculis B-C pair ⓘ |
| hasOtherDesignation |
BD+14 3223
NERFINISHED
ⓘ
HD 156014 NERFINISHED ⓘ HIP 84345 NERFINISHED ⓘ HR 6406 NERFINISHED ⓘ SAO 102680 NERFINISHED ⓘ |
| hasParallax_mas | about 9 ⓘ |
| hasProperName | Rasalgethi NERFINISHED ⓘ |
| hasRadialVelocity_km_s | about −31 ⓘ |
| hasRadius_solar | about 250–300 ⓘ |
| hasRightAscension_J2000 | 17h 14m 38s (approx) ⓘ |
| hasSpectralType |
A9 IV-V
ⓘ
G5 III ⓘ M5 Ib-II ⓘ M5 Ib-II + G5 III + A9 IV-V (composite) ⓘ |
| hasSystemType | triple star system ⓘ |
| hasVariableType | semiregular variable ⓘ |
| isBrightestStarInConstellation | false ⓘ |
| isDominantComponentOf | α Herculis NERFINISHED ⓘ |
| isNamedAfterArabicPhrase | true ⓘ |
| isNearConstellationBorderWith | Ophiuchus NERFINISHED ⓘ |
| isOpticalCompanionOf | α Herculis A NERFINISHED ⓘ |
| isPhysicalCompanionOf | α Herculis B NERFINISHED ⓘ |
| isVariableStar | true ⓘ |
| isVisibleToNakedEye | true ⓘ |
| locatedInConstellation | Hercules NERFINISHED ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.