GCl 117
E507132
GCl 117 is a dense globular star cluster in the constellation Sagittarius, better known as Messier 75 in the Messier catalog.
Statements (39)
| Predicate | Object |
|---|---|
| instanceOf | globular star cluster ⓘ |
| absoluteMagnitudeV | about −8.5 ⓘ |
| addedToMessierCatalogueBy | Charles Messier NERFINISHED ⓘ |
| age | ~13 billion years ⓘ |
| angularSize | 6.8 arcminutes ⓘ |
| apparentMagnitudeV | 8.6 ⓘ |
| belongsToGalaxy | Milky Way NERFINISHED ⓘ |
| bestViewingHemisphere |
Southern Hemisphere
NERFINISHED
ⓘ
low southern skies from Northern Hemisphere ⓘ |
| bestViewingSeason | summer ⓘ |
| catalogCode | GCl 117 ⓘ |
| concentrationClass | I ⓘ |
| contains | old, metal-poor stars ⓘ |
| declination | −21° 55′ 17″ ⓘ |
| discoveredBy | Pierre Méchain NERFINISHED ⓘ |
| discoveryYear | 1780 ⓘ |
| distanceFromEarth |
~20.7 kiloparsecs
ⓘ
~67,500 light-years ⓘ |
| distanceFromGalacticCenter | ~14.7 kiloparsecs ⓘ |
| galacticLatitude | −25.75° ⓘ |
| galacticLongitude | 12.19° ⓘ |
| hasAlternativeName |
M75
ⓘ
Messier 75 NERFINISHED ⓘ NGC 6864 NERFINISHED ⓘ |
| hasColorIndexBminusV | about 0.76 ⓘ |
| hasMorphology | highly concentrated core ⓘ |
| isCoreCollapsed | true ⓘ |
| isPartOf |
Messier catalogue
NERFINISHED
ⓘ
New General Catalogue NERFINISHED ⓘ |
| locatedIn | Milky Way halo NERFINISHED ⓘ |
| locatedInConstellation | Sagittarius NERFINISHED ⓘ |
| messierNumber | 75 ⓘ |
| metallicityFeH | about −1.3 ⓘ |
| ngcNumber | 6864 ⓘ |
| notes | one of the most centrally concentrated globular clusters known ⓘ |
| radialVelocity | ~−186 km/s ⓘ |
| rightAscension | 20h 06m 04s ⓘ |
| shapleySawyerClass | I ⓘ |
| visibility | best seen with medium to large amateur telescopes ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.