σ Orionis cluster
E460826
The σ Orionis cluster is a young, compact star cluster in the Orion constellation, notable for its massive central multiple star system and role in illuminating and shaping the surrounding Orion Molecular Cloud Complex.
Observed surface forms (1)
| Surface form | Occurrences |
|---|---|
| Sigma Orionis | 1 |
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical object
ⓘ
open star cluster ⓘ young stellar cluster ⓘ |
| age | approximately 2–5 million years ⓘ |
| angularSeparationFrom |
Alnilam
NERFINISHED
ⓘ
Alnitak NERFINISHED ⓘ Mintaka NERFINISHED ⓘ |
| associatedWith |
Horsehead Nebula region
NERFINISHED
ⓘ
IC 434 emission nebula NERFINISHED ⓘ |
| contains |
Herbig Ae/Be stars
NERFINISHED
ⓘ
T Tauri stars ⓘ brown dwarfs ⓘ low-mass pre-main-sequence stars ⓘ massive OB-type stars ⓘ planetary-mass objects ⓘ protoplanetary disks ⓘ |
| declination | approximately −02° 36′ ⓘ |
| distanceFromEarth |
approximately 1,200 light-years
ⓘ
approximately 380 parsecs ⓘ |
| embeddedIn | Orion B molecular cloud NERFINISHED ⓘ |
| hasCentralObject | Sigma Orionis multiple star system NERFINISHED ⓘ |
| hasCentralStarType |
B-type companions
ⓘ
O9.5V (Sigma Orionis A) NERFINISHED ⓘ |
| hasMemberCount | several hundred confirmed members ⓘ |
| hasObservationWavelength |
X-ray
ⓘ
infrared ⓘ optical ⓘ |
| hasProperty |
compact
ⓘ
low extinction ⓘ rich in low-mass members ⓘ well-studied initial mass function ⓘ |
| illuminates | IC 434 NERFINISHED ⓘ |
| isNamedAfter | Sigma Orionis NERFINISHED ⓘ |
| isUsedForStudyOf |
X-ray emission from young stars
ⓘ
brown dwarf formation ⓘ initial mass function ⓘ protoplanetary disk evolution ⓘ star formation ⓘ |
| locatedIn |
Milky Way
ⓘ
Orion Molecular Cloud Complex NERFINISHED ⓘ Orion OB1 association NERFINISHED ⓘ |
| locatedInConstellation | Orion NERFINISHED ⓘ |
| partOf | Orion OB1b subgroup NERFINISHED ⓘ |
| rightAscension | approximately 05h 38m ⓘ |
| surveyedBy |
Chandra X-ray Observatory
NERFINISHED
ⓘ
Gaia spacecraft NERFINISHED ⓘ Spitzer Space Telescope NERFINISHED ⓘ XMM-Newton NERFINISHED ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Sigma Orionis