IC 1805
E482654
IC 1805 is a large emission nebula and active star-forming region in the constellation Cassiopeia, notable for its heart-shaped appearance and young, massive star cluster.
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
H II region
ⓘ
deep-sky object ⓘ emission nebula ⓘ star-forming region ⓘ |
| ageOfCentralCluster |
a few million years
ⓘ
about 1.5 million years ⓘ |
| apparentSize |
about 1 degree
ⓘ
about 200 arcminutes ⓘ |
| associatedOpenCluster | Melotte 15 NERFINISHED ⓘ |
| associatedWith | Cassiopeia OB6 association NERFINISHED ⓘ |
| belongsTo | Milky Way NERFINISHED ⓘ |
| bestSeenFrom | Northern Hemisphere NERFINISHED ⓘ |
| bestViewingSeason |
autumn
ⓘ
northern winter ⓘ |
| catalog | Index Catalogue NERFINISHED ⓘ |
| catalogNumber | IC 1805 NERFINISHED ⓘ |
| constellation | Cassiopeia NERFINISHED ⓘ |
| contains |
OB stars
ⓘ
dark dust lanes ⓘ ionization fronts ⓘ massive stellar winds ⓘ pillars of gas and dust ⓘ shock fronts ⓘ star cluster Melotte 15 NERFINISHED ⓘ young massive stars ⓘ |
| declination | +61° 27′ (approximate) ⓘ |
| discoveredIn | 19th century ⓘ |
| discoveryCatalogedBy | John Louis Emil Dreyer NERFINISHED ⓘ |
| distanceFromEarth |
about 2300 parsecs
ⓘ
about 7500 light-years ⓘ |
| dominantEmissionLine | H-alpha ⓘ |
| ionizationSource |
massive O-type stars
ⓘ
young star cluster Melotte 15 NERFINISHED ⓘ |
| locationInGalaxy | Perseus Arm NERFINISHED ⓘ |
| morphology | heart-shaped ⓘ |
| observedIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ radio wavelengths ⓘ |
| otherName | Heart Nebula NERFINISHED ⓘ |
| partOf | a large star-forming complex in Cassiopeia ⓘ |
| popularFor | astrophotography ⓘ |
| requires | narrowband filters for best contrast ⓘ |
| rightAscension | 02h 32m (approximate) ⓘ |
| shapedBy |
radiation pressure from OB stars
ⓘ
stellar winds from massive stars ⓘ |
| starFormationActivity | active ⓘ |
| visibleWith | small telescopes under dark skies ⓘ |
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
IC 1805
subject surface form:
IC 1848