variable star R Scuti
E459138
R Scuti is a luminous RV Tauri-type pulsating variable star in the constellation Scutum, notable for its large, irregular brightness variations and advanced evolutionary stage.
Observed surface forms (1)
| Surface form | Occurrences |
|---|---|
| R Scuti | 0 |
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
RV Tauri variable
ⓘ
pulsating variable star ⓘ variable star ⓘ |
| apparentMagnitudeRange | 4.2–8.6 ⓘ |
| belongsTo | Milky Way NERFINISHED ⓘ |
| brightnessVariation |
irregular
ⓘ
large ⓘ |
| canBeObservedWithNakedEye | yes ⓘ |
| catalogDesignation |
BD−05°4573
NERFINISHED
ⓘ
HD 173819 NERFINISHED ⓘ HIP 92175 NERFINISHED ⓘ HR 7065 NERFINISHED ⓘ R Sct NERFINISHED ⓘ |
| colorIndex | variable ⓘ |
| constellation | Scutum NERFINISHED ⓘ |
| declination | −05° 42′ (approx) ⓘ |
| displaysPeriodChanges | yes ⓘ |
| distanceFromEarth |
~1.5 kiloparsecs
ⓘ
~4900 light-years ⓘ |
| effectiveTemperature | ~4500 K ⓘ |
| energySource | shell hydrogen and helium burning ⓘ |
| evolutionaryStage |
highly evolved star
ⓘ
post-asymptotic giant branch star ⓘ |
| futureEvolution | will evolve into white dwarf ⓘ |
| galacticPopulation | Population II ⓘ |
| hasCircumstellarEnvelope | yes ⓘ |
| hasDustShell | yes ⓘ |
| hasInfraredExcess | yes ⓘ |
| hasPhotometricVariability | yes ⓘ |
| isPrototypeOf | RV Tauri variables with irregular minima ⓘ |
| lightCurveShape | alternating deep and shallow minima ⓘ |
| luminosity | several thousand times solar ⓘ |
| luminosityClass | Ib ⓘ |
| mass | ~0.6–0.8 solar masses ⓘ |
| metallicity | subsolar ⓘ |
| minimumBrightnessRequiresBinoculars | yes ⓘ |
| observedBy | AAVSO NERFINISHED ⓘ |
| parallax | ~0.66 mas ⓘ |
| pulsationMode | radial ⓘ |
| radialVelocity | ~+44 km/s ⓘ |
| radius | ~150–200 solar radii ⓘ |
| rightAscension | 18h 47m (approx) ⓘ |
| showsEmissionLines | yes ⓘ |
| spectralType |
G5Ib
ⓘ
K2Ib ⓘ |
| variabilityPeriod | ~140 days ⓘ |
| variableStarDesignation | R Scuti NERFINISHED ⓘ |
| variableType | RV Tauri NERFINISHED ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.