σ Herculis
E933108
σ Herculis is a binary star system in the constellation Hercules, visible to the naked eye and known for its relatively bright, closely orbiting stellar components.
Observed surface forms (2)
| Surface form | Occurrences |
|---|---|
| σ Herculis A | 0 |
| σ Herculis B | 0 |
Statements (32)
| Predicate | Object |
|---|---|
| instanceOf |
binary star system
ⓘ
main-sequence star ⓘ main-sequence star ⓘ stellar system ⓘ |
| apparentMagnitudeV | approximately 4.2 ⓘ |
| BayerDesignation | σ Herculis NERFINISHED ⓘ |
| belongsTo | Milky Way NERFINISHED ⓘ |
| constellation | Hercules NERFINISHED ⓘ |
| declination | +42° ⓘ |
| distanceFromEarth |
about 29 parsecs
ⓘ
about 95 light-years ⓘ |
| FlamsteedDesignation | not commonly used ⓘ |
| galacticPopulation | thin disk ⓘ |
| hasCloseOrbit | true ⓘ |
| hasComponent |
σ Herculis A
NERFINISHED
ⓘ
σ Herculis B NERFINISHED ⓘ |
| hasDebrisDisk | true ⓘ |
| hasOrbitalPeriod | about 7.4 years ⓘ |
| hasProperMotion | measurable ⓘ |
| isBrightStar | true ⓘ |
| isCataloguedIn |
Henry Draper Catalogue
NERFINISHED
ⓘ
Hipparcos Catalogue NERFINISHED ⓘ |
| isNorthernHemisphereObject | true ⓘ |
| isVisibleTo | naked eye ⓘ |
| locatedIn | constellation Hercules ⓘ |
| luminosity | tens of times solar luminosity ⓘ |
| mass | about 2.5 solar masses ⓘ |
| rightAscension | approximately 18h 47m ⓘ |
| showsInfraredExcess | true ⓘ |
| spectralType |
A-type star
ⓘ
B9V ⓘ B9V ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.