Messier 30
E247367
Messier 30 is a dense globular star cluster located in the constellation Capricornus, composed of hundreds of thousands of ancient stars bound tightly by gravity.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Messier 30 canonical | 2 |
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
Messier object
ⓘ
deep-sky object ⓘ globular star cluster ⓘ |
| absoluteMagnitudeV | −7.45 ⓘ |
| age | about 12.9 billion years ⓘ |
| alsoKnownAs |
M30
ⓘ
NGC 7099 ⓘ |
| angularSize | 12 arcminutes ⓘ |
| apparentMagnitudeV | 7.2 ⓘ |
| bestViewingMonth | August ⓘ |
| binding | gravitationally bound star cluster ⓘ |
| catalog |
Messier catalogue
ⓘ
New General Catalogue ⓘ |
| contains |
RR Lyrae variable stars
ⓘ
surface form:
RR Lyrae variables
blue straggler stars ⓘ hundreds of thousands of stars ⓘ variable stars ⓘ |
| coreCollapseStatus | core-collapsed ⓘ |
| coreConcentration | high ⓘ |
| coreRadius | about 0.05 arcminutes ⓘ |
| declination | −23° 10′ 47″ ⓘ |
| discoveredBy | Charles Messier ⓘ |
| discovererRole | French astronomer ⓘ |
| discoveryDate | 1764 ⓘ |
| distanceFromEarth |
about 27,000 light-years
ⓘ
about 8.3 kiloparsecs ⓘ |
| dominantStellarType | old, low-metallicity stars ⓘ |
| galacticLatitude | −27.3 degrees ⓘ |
| galacticLongitude | 27.2 degrees ⓘ |
| halfLightRadius | about 1.0 arcminutes ⓘ |
| locatedIn | Milky Way ⓘ |
| locatedInConstellation | Capricornus ⓘ |
| mass | about 1.6×10^5 solar masses ⓘ |
| memberOf |
Milky Way stellar halo
ⓘ
surface form:
Milky Way halo
|
| metallicity | low ⓘ |
| metallicityFeH | about −2.3 ⓘ |
| observedBy | Hubble Space Telescope ⓘ |
| observedIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ |
| OosterhoffType | II ⓘ |
| radialVelocity | about −182 km/s ⓘ |
| reddeningEBV | about 0.03 ⓘ |
| rightAscension | 21h 40m 22s ⓘ |
| skyLocation | southern sky ⓘ |
| stellarPopulation | Population II ⓘ |
| surfaceBrightness | high ⓘ |
| tidalRadius | about 18 arcminutes ⓘ |
| visibility | best seen from southern and equatorial latitudes ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Capricornus
subject surface form:
Capricornus