redSupergiant Stephenson 2-18
E459136
Stephenson 2-18 is an extremely luminous red supergiant star, considered one of the largest known stars in the Milky Way.
Observed surface forms (1)
| Surface form | Occurrences |
|---|---|
| Stephenson 2-18 | 0 |
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
cool supergiant
ⓘ
luminous supergiant ⓘ red supergiant star ⓘ star ⓘ |
| discoveredBy | Charles Bruce Stephenson NERFINISHED ⓘ |
| discoveryMethod | infrared survey ⓘ |
| hasAlternativeName |
RSGC2-18
NERFINISHED
ⓘ
St2-18 NERFINISHED ⓘ Stephenson 2 DFK 49 NERFINISHED ⓘ |
| hasApparentMagnitude | very faint in visible light ⓘ |
| hasApproximateDistanceFromEarth |
about 19,000 light-years
ⓘ
about 6 kiloparsecs ⓘ |
| hasApproximateLuminosity | hundreds of thousands of times the luminosity of the Sun ⓘ |
| hasApproximateRadius |
over 2000 times the radius of the Sun
ⓘ
over 9 astronomical units ⓘ |
| hasColor | red ⓘ |
| hasEffectiveTemperature | approximately 3200 K ⓘ |
| hasEstimatedInitialMass | tens of solar masses ⓘ |
| hasEvolutionaryStage | late stage massive star ⓘ |
| hasExtendedStellarAtmosphere | true ⓘ |
| hasGalacticEnvironment | highly reddened region ⓘ |
| hasGalacticLocation | inner Milky Way disk ⓘ |
| hasHighInfraredBrightness | true ⓘ |
| hasHighMassLossRate | true ⓘ |
| hasLuminosityClass | Ia ⓘ |
| hasOuterLayers | cool extended envelope ⓘ |
| hasResearchInterest |
late stages of massive stars
ⓘ
mass loss in red supergiants ⓘ massive star evolution ⓘ |
| hasSpectralClass | M6 ⓘ |
| hasSpectralType | M-type ⓘ |
| hasStellarPopulation | Population I ⓘ |
| hasStellarWind | dense slow stellar wind ⓘ |
| hasVariability | suspected semiregular variability ⓘ |
| isAmong |
largest known stars
ⓘ
most luminous red supergiants ⓘ |
| isEmbeddedIn | rich red supergiant cluster Stephenson 2 NERFINISHED ⓘ |
| isObscuredBy | interstellar dust ⓘ |
| isUsedAs |
example of extreme red supergiant
ⓘ
example of extreme stellar radius ⓘ |
| locatedIn |
Milky Way
ⓘ
constellation Scutum NERFINISHED ⓘ |
| memberOf | open cluster Stephenson 2 NERFINISHED ⓘ |
| willEndAs | core-collapse supernova ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.