Messier 55

E114375

Messier 55 is a large, relatively loose globular star cluster located in the constellation Sagittarius, visible in small telescopes as a faint, diffuse ball of stars.

All labels observed (1)

Label Occurrences
Messier 55 canonical 3

How this entity was disambiguated

Statements (39)

Predicate Object
instanceOf Messier object ⓘ
NGC object ⓘ
globular star cluster ⓘ
addedToMessierCatalogueBy Charles Messier ⓘ
age about 12.3 billion years ⓘ
angularSize 19 arcminutes ⓘ
apparentMagnitudeV 6.3 ⓘ
belongsTo Local Group ⓘ
bestSeenIn August ⓘ
catalogue Messier catalogue ⓘ
New General Catalogue ⓘ
concentrationClass Class XI ⓘ
constellation Sagittarius ⓘ
contains RR Lyrae variable stars ⓘ
coreCollapseStatus non–core-collapsed ⓘ
declination −30° 58′ ⓘ
discoveredBy Nicolas-Louis de Lacaille ⓘ
linked to: Nicolas de Lacaille
discovererLocation South Africa ⓘ
discoveryYear 1752 ⓘ
distanceFromEarth about 17,600 light-years ⓘ
about 5.4 kiloparsecs ⓘ
galacticLatitude −23.3° ⓘ
galacticLongitude 9.2° ⓘ
locatedIn Galactic halo ⓘ
Milky Way ⓘ
mass about 2.7×10^5 solar masses ⓘ
messierCatalogueNumber 55 ⓘ
metallicityFeH about −1.9 ⓘ
ngcNumber 6809 ⓘ
notableProperty low metallicity ⓘ
relatively loose globular cluster ⓘ
visible in small telescopes as a faint diffuse ball of stars ⓘ
otherName GCl 111 ⓘ
M55 ⓘ
NGC 6809 ⓘ
radius about 48 light-years ⓘ
rightAscension 19h 40m ⓘ
surfaceBrightness low ⓘ
visibleFrom Southern Hemisphere ⓘ

How these facts were elicited

Referenced by (3)

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

Sagittarius → contains → Messier 55 ⓘ
GCl 111 → alsoKnownAs → Messier 55 ⓘ
NGC 6809 → alsoKnownAs → Messier 55 ⓘ