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.

All labels observed (1)

Label Occurrences
variable star R Scuti canonical 3

How this entity was disambiguated

Statements (48)

Predicate Object
instanceOf RV Tauri variable
pulsating variable star
variable star
apparentMagnitudeRange 4.2–8.6
belongsTo Milky Way
brightnessVariation irregular
large
canBeObservedWithNakedEye yes
catalogDesignation BD−05°4573
HD 173819
HIP 92175
HR 7065
R Sct
linked to: R Scuti
colorIndex variable
constellation Scutum
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
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
variableType RV Tauri

How these facts were elicited

Referenced by (3)

Full triples — surface form annotated when it differs from this entity's canonical label.

Scutum contains variable star R Scuti
Scutum contains variable star R Scuti
subject linked to: Scutum constellation
Sobieski’s Shield contains variable star R Scuti