Horsehead Nebula
E132579
The Horsehead Nebula is a dark molecular cloud in the constellation Orion, famous for its distinctive horse-head shape silhouetted against a bright emission nebula.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Horsehead Nebula canonical | 4 |
| Horsehead Nebula (Barnard 33) | 1 |
| Lynds Dark Nebula 1630 | 1 |
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical object
ⓘ
dark nebula ⓘ interstellar cloud ⓘ molecular cloud ⓘ |
| alsoKnownAs | Barnard 33 ⓘ |
| angularSize | about 8 arcminutes by 6 arcminutes ⓘ |
| apparentMagnitudeV | 6.8 ⓘ |
| bestSeenFrom |
Northern Celestial Hemisphere
ⓘ
surface form:
Northern Hemisphere
|
| catalogCode | B33 ⓘ |
| composition |
cold molecular gas
ⓘ
interstellar dust ⓘ |
| contains |
dense clumps of gas
ⓘ
star-forming regions ⓘ |
| declination | −02° 27′ 30″ ⓘ |
| discoveredBy | Williamina Fleming ⓘ |
| discoveryYear | 1888 ⓘ |
| distanceFromEarth |
about 1375 light-years
ⓘ
about 420 parsecs ⓘ |
| dustContent | high ⓘ |
| emissionMechanismOfBackground | hydrogen recombination in IC 434 ⓘ |
| featuredIn | many astronomical catalogs ⓘ |
| galacticLatitude | −17.4 ⓘ |
| galacticLongitude | 206.9 ⓘ |
| gasDensity | relatively high for interstellar medium ⓘ |
| hostGalaxy | Milky Way ⓘ |
| ionizingSourceOfBackground |
σ Orionis cluster
ⓘ
surface form:
Sigma Orionis
|
| locatedIn |
Milky Way
ⓘ
Orion constellation ⓘ
surface form:
Orion Belt region
Orion Molecular Cloud Complex ⓘ |
| locatedInConstellation | Orion ⓘ |
| near |
Flame Nebula
ⓘ
NGC 2024 ⓘ |
| notableFor |
distinctive dark outline
ⓘ
popular astrophotography target ⓘ |
| observationalDifficulty | requires dark skies and imaging ⓘ |
| observedIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ radio wavelengths ⓘ |
| partOf | IC 434 region ⓘ |
| reddeningEffect | strong extinction of background light ⓘ |
| regionType | star-forming region ⓘ |
| rightAscension | 05h 40m 59s ⓘ |
| shapeDescription | horse-head silhouette ⓘ |
| silhouettedAgainst |
Barnard 33
ⓘ
surface form:
IC 434
|
| spectralFeatures | molecular emission lines ⓘ |
| temperature | very cold ⓘ |
| typeOfCloud | Bok globule-like structure ⓘ |
| visibleNear | Alnitak ⓘ |
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Lynds Dark Nebula 1630
this entity surface form:
Horsehead Nebula (Barnard 33)