Tucana Dwarf Galaxy

E136264
dwarf spheroidal galaxy galaxy satellite galaxy

The Tucana Dwarf Galaxy is a faint, isolated dwarf spheroidal galaxy located on the outskirts of the Local Group, notable for its old stellar population and lack of recent star formation.

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All labels observed (1)

Label Occurrences
Tucana Dwarf Galaxy canonical 4

Statements (47)

Predicate Object
instanceOf dwarf spheroidal galaxy ⓘ
galaxy ⓘ
satellite galaxy ⓘ
belongsTo southern sky ⓘ
discoveredBy Halton Arp ⓘ
surface form: H. C. Arp

R. G. Tifft ⓘ
discoveryYear 1969 ⓘ
hasAbsoluteMagnitudeV about −9.5 ⓘ
hasAlternativeName Tucana Dwarf Spheroidal ⓘ
Tucana dSph ⓘ
hasAngularSize ~15 arcminutes ⓘ
hasApparentMagnitudeV ~15.1 ⓘ
hasClassification isolated dwarf spheroidal of the Local Group ⓘ
hasColor red ⓘ
hasDarkMatterContent dark-matter-dominated ⓘ
hasDeclination −64° 25′ ⓘ
hasDistanceFromEarth ~2.8 million light-years ⓘ
~870 kiloparsecs ⓘ
hasDominantStellarPopulation red giant branch stars ⓘ
hasDominantStellarPopulationAge >8 Gyr ⓘ
hasEnvironment relatively isolated from massive Local Group galaxies ⓘ
hasEscapeEnvironment far from Milky Way and Andromeda ⓘ
hasGalaxyType early-type dwarf ⓘ
hasGasContent gas-poor ⓘ
hasGasPhaseStarFormation absent ⓘ
hasGlobularClusters none known ⓘ
hasHIEmission undetected or extremely weak ⓘ
hasKinematics pressure-supported ⓘ
hasLuminosityClass low-luminosity ⓘ
hasMetallicity low ⓘ
hasMorphologicalType dSph ⓘ
hasNeutralHydrogenContent very low ⓘ
hasRadialVelocity ~+194 km/s (heliocentric) ⓘ
hasRecentStarFormation no ⓘ
hasRightAscension 22h 41m ⓘ
hasShape spheroidal ⓘ
hasStarFormation quiescent ⓘ
hasStarFormationHistory no significant star formation in the last several Gyr ⓘ
hasStarFormationRate negligible ⓘ
hasStellarComponent old, metal-poor stars ⓘ
hasStellarPopulation old ⓘ
hasSurfaceBrightness low ⓘ
isIsolated true ⓘ
locatedIn constellation Tucana ⓘ
locatedOnOutskirtsOf Local Group ⓘ
memberOf Local Group ⓘ
orbits Local Group barycenter ⓘ

Referenced by (4)

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

Local Group → contains → Tucana Dwarf Galaxy ⓘ
LG → containsGalaxy → Tucana Dwarf Galaxy ⓘ
constellation Tucana → contains → Tucana Dwarf Galaxy ⓘ
subject surface form: Tucana
constellation Tucana → notableDeepSkyObject → Tucana Dwarf Galaxy ⓘ
subject surface form: Tucana