Messier 4
E473829
Messier 4 is a bright, nearby globular star cluster located in the constellation Scorpius and is one of the easiest globular clusters to observe with small telescopes.
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
Messier object
ⓘ
NGC object ⓘ deep-sky object ⓘ globular star cluster ⓘ |
| absoluteMagnitudeV | about −7.2 ⓘ |
| age | about 12 billion years ⓘ |
| angularSize | 26 arcminutes ⓘ |
| apparentMagnitudeV | 5.6 ⓘ |
| bestSeenInMonth | June ⓘ |
| cataloguedBy | Charles Messier NERFINISHED ⓘ |
| contains |
RR Lyrae variable stars
ⓘ
blue straggler stars ⓘ millisecond pulsars ⓘ pulsars ⓘ white dwarfs ⓘ |
| coreRadius | about 0.53 parsecs ⓘ |
| declination | −26° 32′ ⓘ |
| discoveredBy | Philippe Loys de Chéseaux NERFINISHED ⓘ |
| discoveryYear | 1746 ⓘ |
| distanceFromEarth |
about 2.2 kiloparsecs
ⓘ
about 6,000 light-years ⓘ |
| distanceFromGalacticCenter | about 5.9 kiloparsecs ⓘ |
| easilyResolvedWith | small telescopes ⓘ |
| galacticPopulation | Population II ⓘ |
| halfLightRadius | about 2.3 parsecs ⓘ |
| hasCentralBarStructure | yes ⓘ |
| hasDesignation |
M4
NERFINISHED
ⓘ
NGC 6121 NERFINISHED ⓘ |
| hasNotableObject |
PSR B1620−26
NERFINISHED
ⓘ
PSR B1620−26 b NERFINISHED ⓘ |
| isOneOfNearestGlobularClusters | yes ⓘ |
| locatedInConstellation | Scorpius NERFINISHED ⓘ |
| locatedInDirectionOf | Scorpius tail region NERFINISHED ⓘ |
| locatedInGalacticComponent | inner halo ⓘ |
| locatedInGalaxy | Milky Way NERFINISHED ⓘ |
| mass | about 1.6×10^5 solar masses ⓘ |
| messierNumber | 4 ⓘ |
| metallicityFeH | about −1.1 ⓘ |
| nearbyBrightStar | Antares NERFINISHED ⓘ |
| observedBy | Hubble Space Telescope NERFINISHED ⓘ |
| observedFromHemisphere |
Southern Hemisphere
NERFINISHED
ⓘ
low northern latitudes ⓘ |
| rankByDistance | among closest globular clusters to Earth ⓘ |
| rightAscension | 16h 23m ⓘ |
| separationFromAntares | about 1.3 degrees ⓘ |
| tidalRadius | about 32.5 parsecs ⓘ |
| usedForStudyOf |
stellar evolution in low metallicity environments
ⓘ
white dwarf cooling sequences ⓘ |
| visibilityToNakedEye | visible under dark skies ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.