47 Tucanae

E492362

globular star cluster

47 Tucanae is a massive, bright globular star cluster in the constellation Tucana, notable as one of the closest and most studied such clusters in the Milky Way.

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Observed surface forms (3)

Surface form	Occurrences
NGC 104	2
47 Tuc	1
47 Tucanae (as a notable southern cluster)	1

Statements (47)

Predicate	Object
instanceOf	globular star cluster ⓘ
age	about 11–13 billion years ⓘ
alsoKnownAs	47 Tuc NERFINISHED ⓘ Caldwell 106 NERFINISHED ⓘ NGC 104 NERFINISHED ⓘ
angularDiameter	about 30 arcminutes ⓘ
apparentMagnitudeV	about 4.0 ⓘ
brighterOnlyThan	Omega Centauri NERFINISHED ⓘ
CaldwellNumber	C106 ⓘ
catalog	Caldwell catalogue NERFINISHED ⓘ New General Catalogue NERFINISHED ⓘ
catalogNumber	NGC 104 NERFINISHED ⓘ
constellation	Tucana NERFINISHED ⓘ
contains	X-ray binaries ⓘ blue straggler stars ⓘ horizontal branch stars ⓘ millisecond pulsars ⓘ red giant branch stars ⓘ white dwarfs ⓘ
coreRadius	about 0.5 parsecs ⓘ
declination	−72° 05′ ⓘ
discoveredBy	Nicolas-Louis de Lacaille NERFINISHED ⓘ
discoveryYear	1751–1752 ⓘ
distanceFromEarth	about 13,000 light-years ⓘ about 4,000 parsecs ⓘ
galacticComponent	Galactic halo ⓘ
galacticLatitude	about −44° ⓘ
galacticLongitude	about 305° ⓘ
halfLightRadius	about 3.2 parsecs ⓘ
hemisphereVisibility	best seen from Southern Hemisphere ⓘ
lineOfSightNear	Small Magellanic Cloud NERFINISHED ⓘ
locatedIn	Milky Way ⓘ
mass	about 10^6 solar masses ⓘ
metallicity[Fe/H]	about -0.7 ⓘ
numberOfKnownMillisecondPulsars	over 20 ⓘ
observedBy	Chandra X-ray Observatory NERFINISHED ⓘ Hubble Space Telescope NERFINISHED ⓘ Very Large Telescope NERFINISHED ⓘ
rankByBrightness	second-brightest globular cluster in the sky ⓘ
rightAscension	00h 24m ⓘ
skyRegion	Small Magellanic Cloud region of the sky ⓘ
surfaceBrightness	very high ⓘ
usedForStudyOf	binary star evolution ⓘ dynamics of dense stellar systems ⓘ millisecond pulsar populations ⓘ stellar evolution ⓘ
visibility	naked-eye object under dark southern skies ⓘ

Referenced by (6)

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

47 Tucanae (in its vicinity on the sky) → alsoKnownAs → 47 Tucanae ⓘ

subject surface form: 47 Tucanae

this entity surface form: NGC 104

47 Tucanae (in its vicinity on the sky) → alsoKnownAs → 47 Tucanae ⓘ

subject surface form: 47 Tucanae

this entity surface form: 47 Tuc

47 Tucanae (in its vicinity on the sky) → catalogNumber → 47 Tucanae ⓘ

subject surface form: 47 Tucanae

this entity surface form: NGC 104

constellation Tucana → contains → 47 Tucanae ⓘ

subject surface form: Tucana

Nicolas de Lacaille → discovered → 47 Tucanae ⓘ

this entity surface form: 47 Tucanae (as a notable southern cluster)

constellation Tucana → notableDeepSkyObject → 47 Tucanae ⓘ

subject surface form: Tucana