Messier 12

E486469

Messier 12 is a globular star cluster located in the constellation Ophiuchus, notable for its relatively loose structure and rich population of ancient stars.

All labels observed (1)

Label Occurrences
Messier 12 canonical 2

How this entity was disambiguated

Statements (47)

Predicate Object
instanceOf Messier object ⓘ
NGC object ⓘ
globular star cluster ⓘ
absoluteMagnitudeV about −7.3 ⓘ
age about 12.6 billion years ⓘ
alsoKnownAs M12 ⓘ
NGC 6218 ⓘ
angularSize 14.5 arcminutes ⓘ
apparentMagnitudeB 7.68 ⓘ
apparentMagnitudeRangeOfStars down to about magnitude 13 ⓘ
apparentMagnitudeV 6.7 ⓘ
belongsTo Milky Way globular cluster system ⓘ
bestSeenFrom Northern Hemisphere ⓘ
bestViewingSeason late spring ⓘ
canBeObservedWith small telescope ⓘ
catalog Messier catalogue ⓘ
New General Catalogue ⓘ
contains ancient stars ⓘ
blue straggler stars ⓘ
horizontal branch stars ⓘ
red giant branch stars ⓘ
coreRadius about 1.77 arcminutes ⓘ
declination −01° 56′ 54″ ⓘ
discoveredAs nebula without stars ⓘ
discoveredBy Charles Messier ⓘ
discoveryDate 1764 ⓘ
distanceFromEarth about 16,000 light-years ⓘ
about 4.9 kiloparsecs ⓘ
epoch J2000 ⓘ
galacticLatitude 26.31 degrees ⓘ
galacticLongitude 15.72 degrees ⓘ
halfLightRadius about 3.0 arcminutes ⓘ
hasColorIndexBminusV about 0.73 ⓘ
hasLooseStructure true ⓘ
heliocentricRadialVelocity about +16 km/s ⓘ
isNearOnSky Messier 10 ⓘ
locatedIn Galactic halo ⓘ
Milky Way ⓘ
locatedInConstellation Ophiuchus ⓘ
metallicityFeH about −1.3 ⓘ
notableFor relatively loose structure ⓘ
rich population of ancient stars ⓘ
observedBy Hubble Space Telescope ⓘ
partOf Ophiuchus constellation region ⓘ
linked to: Ophiuchus
rightAscension 16h 47m 14s ⓘ
ShapleySawyerConcentrationClass IX ⓘ
tidalRadius about 17.6 arcminutes ⓘ

How these facts were elicited

Referenced by (2)

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

Ophiuchus → containsDeepSkyObject → Messier 12 ⓘ
Ophiuchus → containsDeepSkyObject → Messier 12 ⓘ
subject linked to: Oph