|
gptkbp:instanceOf
|
gptkb:open_cluster
|
|
gptkbp:age
|
~12.2 billion years
|
|
gptkbp:alsoKnownAs
|
gptkb:M4
|
|
gptkbp:angularSize
|
36 arcminutes
|
|
gptkbp:apparentMagnitude
|
5.6
|
|
gptkbp:bestViewedIn
|
May to August
|
|
gptkbp:catalogue
|
gptkb:NGC_6121
gptkb:Messier_Catalogue
|
|
gptkbp:cataloguedIn
|
gptkb:Charles_Messier
|
|
gptkbp:catalogueNumber
|
4
|
|
gptkbp:constellation
|
gptkb:Scorpius
|
|
gptkbp:contains
|
gptkb:planet_PSR_B1620-26_b
millisecond pulsar PSR B1620-26
|
|
gptkbp:coreRadius
|
0.83 light-years
|
|
gptkbp:declination
|
-26° 31′ 32.7″
|
|
gptkbp:discoveredBy
|
gptkb:Philippe_Loys_de_Chéseaux
|
|
gptkbp:discoveredIn
|
1746
|
|
gptkbp:distanceFromEarth
|
7,200 light-years
|
|
gptkbp:hasViewOf
|
gptkb:Southern_Hemisphere
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Messier 4
|
|
gptkbp:locatedIn
|
gptkb:Scorpius
|
|
gptkbp:mass
|
~100,000 solar masses
|
|
gptkbp:metallicity
|
[Fe/H] = -1.07
|
|
gptkbp:notableFeature
|
closest globular cluster to Earth
contains a central bar structure
|
|
gptkbp:partOf
|
gptkb:Milky_Way
|
|
gptkbp:rightAscension
|
16h 23m 35.22s
|
|
gptkbp:tidalRadius
|
21.5 light-years
|
|
gptkbp:bfsParent
|
gptkb:Charles_Messier
gptkb:Scorpius
gptkb:Scorpius_constellation
|
|
gptkbp:bfsLayer
|
6
|