Barnard 33
E459023
Barnard 33, commonly known as the Horsehead Nebula, is a small dark nebula in the constellation Orion whose distinctive horse-head shape is silhouetted against the bright emission nebula IC 434.
Observed surface forms (1)
| Surface form | Occurrences |
|---|---|
| IC 434 | 1 |
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical object
ⓘ
dark nebula ⓘ molecular cloud ⓘ |
| angularHeightOfHorseHead | about 3.5 arcminutes ⓘ |
| apparentSize | about 8 arcminutes by 6 arcminutes ⓘ |
| associatedWith | star formation ⓘ |
| backgroundEmission | H-alpha emission from IC 434 ⓘ |
| bestSeenFrom | Northern Hemisphere NERFINISHED ⓘ |
| bestViewingSeason | winter ⓘ |
| catalog | Barnard Catalogue of Dark Markings in the Sky NERFINISHED ⓘ |
| catalogCode | Barnard 33 NERFINISHED ⓘ |
| contains |
dense molecular gas
ⓘ
interstellar dust ⓘ |
| declination | −02° 27′ 30″ ⓘ |
| discoveredBy | Williamina Fleming NERFINISHED ⓘ |
| discoveryYear | 1888 ⓘ |
| distanceFromEarth |
about 1375 light-years
ⓘ
about 420 parsecs ⓘ |
| dustComposition | silicate and carbonaceous grains ⓘ |
| equatorialCoordinateSystem | J2000 ⓘ |
| featuredIn | many astrophotographs ⓘ |
| gasComposition | primarily molecular hydrogen ⓘ |
| hasColorInImages | dark silhouette against red emission background ⓘ |
| hasCommonName | Horsehead Nebula NERFINISHED ⓘ |
| hasFeature |
bright rim on side facing Sigma Orionis
ⓘ
streamers of gas and dust extending from the head region ⓘ |
| illuminatedBy | Sigma Orionis NERFINISHED ⓘ |
| influencedBy | radiation from nearby massive stars ⓘ |
| locatedInConstellation | Orion NERFINISHED ⓘ |
| locatedInRegion | Orion Molecular Cloud Complex NERFINISHED ⓘ |
| mass | several solar masses ⓘ |
| namedBy | Edward Emerson Barnard NERFINISHED ⓘ |
| near |
Alnitak
NERFINISHED
ⓘ
Flame Nebula NERFINISHED ⓘ |
| nebulaType | absorption nebula ⓘ |
| observedBy |
Hubble Space Telescope
NERFINISHED
ⓘ
Subaru Telescope NERFINISHED ⓘ Very Large Telescope NERFINISHED ⓘ |
| partOf | Orion Belt region NERFINISHED ⓘ |
| projectedOn | IC 434 NERFINISHED ⓘ |
| requires |
dark skies for visual observation
ⓘ
moderate to large telescope for visual observation ⓘ |
| rightAscension | 05h 40m 59s ⓘ |
| shape | horse-head silhouette ⓘ |
| silhouettedAgainst | IC 434 NERFINISHED ⓘ |
| visibleIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ |
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
IC 434