NGC 869
E460835
NGC 869 is a young, massive open star cluster in the constellation Perseus, best known as one half of the prominent Double Cluster visible to the naked eye.
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical object
ⓘ
open star cluster ⓘ star cluster ⓘ |
| age |
about 13 million years
ⓘ
young ⓘ |
| angularSize | 30 arcminutes ⓘ |
| apparentBrightness | prominent ⓘ |
| apparentMagnitudeV | 5.3 ⓘ |
| appearsIn | Perseus OB association region NERFINISHED ⓘ |
| bestSeenFrom | Northern Hemisphere NERFINISHED ⓘ |
| bestSeenInMonth | November ⓘ |
| CaldwellNumber | C14 ⓘ |
| catalog |
Caldwell catalog
NERFINISHED
ⓘ
NGC NERFINISHED ⓘ |
| clusterType | rich ⓘ |
| constellation | Perseus NERFINISHED ⓘ |
| contains |
B-type stars
ⓘ
blue giants ⓘ main-sequence stars ⓘ massive stars ⓘ |
| coreRadius | a few arcminutes ⓘ |
| declination | +57° 09′ ⓘ |
| discoveredBy | Hipparchus NERFINISHED ⓘ |
| distanceFromEarth |
about 2,300 parsecs
ⓘ
about 7,500 light-years ⓘ |
| galacticLatitude | about +4° ⓘ |
| galacticLongitude | about 135° ⓘ |
| hasAlternativeName |
Double Cluster in Perseus (component)
NERFINISHED
ⓘ
h Persei NERFINISHED ⓘ |
| locatedIn |
Milky Way
ⓘ
Perseus Arm NERFINISHED ⓘ |
| mass | several thousand solar masses ⓘ |
| metallicity | near-solar ⓘ |
| numberOfStars | several hundred visible members ⓘ |
| observedSince | antiquity ⓘ |
| observedWith |
binoculars
ⓘ
small telescopes ⓘ |
| pairedWith | NGC 884 NERFINISHED ⓘ |
| partOf | Double Cluster NERFINISHED ⓘ |
| rightAscension | 02h 19m ⓘ |
| stellarPopulation | Population I ⓘ |
| usedFor |
studies of open cluster dynamics
ⓘ
studies of stellar evolution ⓘ |
| visibleToNakedEye | true ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.