open cluster IC 1805
E480048
Open cluster IC 1805 is a young, massive star cluster in the constellation Cassiopeia that illuminates and shapes the surrounding Heart Nebula with its hot, luminous stars.
Observed surface forms (2)
| Surface form | Occurrences |
|---|---|
| IC 1805 | 0 |
| cluster IC 1805 | 1 |
Statements (52)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical object
ⓘ
open star cluster ⓘ young massive cluster ⓘ |
| age |
about 1.5 million years
ⓘ
less than 5 million years ⓘ |
| apparentMagnitude | about 6.5 ⓘ |
| associatedWith |
Heart Nebula
NERFINISHED
ⓘ
W4 H II region NERFINISHED ⓘ |
| bestObservedIn | autumn ⓘ |
| bestSeenFrom | Northern Hemisphere NERFINISHED ⓘ |
| catalogCode | IC 1805 NERFINISHED ⓘ |
| cataloguedIn | Index Catalogue NERFINISHED ⓘ |
| constellation | Cassiopeia NERFINISHED ⓘ |
| contains |
B-type stars
ⓘ
Herbig Ae/Be candidates ⓘ OB association members ⓘ T Tauri candidates ⓘ emission-line stars ⓘ massive O-type stars ⓘ pre-main-sequence stars ⓘ |
| declination | +61° 27′ ⓘ |
| discoveredIn | 19th century ⓘ |
| distanceFromEarth |
about 1.9 kiloparsecs
ⓘ
about 6000 light-years ⓘ |
| dominantSpectralTypes |
O-type
ⓘ
early B-type ⓘ |
| drives | stellar winds that carve cavities in the nebula ⓘ |
| embeddedIn | molecular cloud complex W3–W4–W5 NERFINISHED ⓘ |
| hasAngularSize | about 20 arcminutes ⓘ |
| hasCoreRadius | a few arcminutes ⓘ |
| hasInfraredExcessSources | young stellar objects ⓘ |
| hasMassiveMembers |
O4-type stars
NERFINISHED
ⓘ
O5-type stars ⓘ |
| hasStellarPopulation | several thousand stars ⓘ |
| hasXRayEmission | from hot massive stars ⓘ |
| illuminates | Heart Nebula NERFINISHED ⓘ |
| ionizes | surrounding H II region ⓘ |
| isSiteOf | ongoing star formation in surrounding region ⓘ |
| liesNear |
Double Cluster in Perseus
NERFINISHED
ⓘ
IC 1848 NERFINISHED ⓘ |
| locatedIn |
Heart Nebula
NERFINISHED
ⓘ
Milky Way ⓘ Perseus Arm NERFINISHED ⓘ |
| observedIn |
X-ray wavelengths
ⓘ
infrared wavelengths ⓘ optical wavelengths ⓘ |
| otherName |
Collinder 26
NERFINISHED
ⓘ
Melotte 15 NERFINISHED ⓘ OCL 344 ⓘ |
| partOf | Cas OB6 association ⓘ |
| rightAscension | 02h 32m ⓘ |
| shapes | Heart Nebula NERFINISHED ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
cluster IC 1805