BD+31 643
E459041
BD+31 643 is a young, massive star system located in the Perseus OB2 stellar association, notable for its role in studies of early stellar evolution and circumstellar material.
Observed surface forms (2)
| Surface form | Occurrences |
|---|---|
| BD+31 643 A | 0 |
| BD+31 643 B | 0 |
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
B-type main-sequence star
ⓘ
B-type main-sequence star ⓘ B-type star ⓘ binary star system ⓘ stellar system ⓘ young stellar object ⓘ |
| emitsStronglyIn |
optical
ⓘ
ultraviolet ⓘ |
| hasAge | a few million years ⓘ |
| hasAssociatedDust | yes ⓘ |
| hasAssociatedReflectionNebula | yes ⓘ |
| hasCircumstellarMaterial | yes ⓘ |
| hasColorIndex | blue ⓘ |
| hasComponent |
BD+31 643 A
NERFINISHED
ⓘ
BD+31 643 B NERFINISHED ⓘ |
| hasDeclination | +32° (approximate) ⓘ |
| hasDistanceFromEarth |
about 1000 light-years
ⓘ
about 300 parsecs ⓘ |
| hasEffectiveTemperature | about 15000 K (order of magnitude) ⓘ |
| hasEnvironment |
OB association
ⓘ
star-forming region ⓘ |
| hasGalacticPopulation | Population I ⓘ |
| hasHighMass | yes ⓘ |
| hasInfraredExcess | yes ⓘ |
| hasLuminosityClass | V ⓘ |
| hasNearbyMolecularCloud | yes ⓘ |
| hasObservedDiskOrRingStructure | yes ⓘ |
| hasRightAscension | 03h 44m (approximate) ⓘ |
| hasSpectralType | B-type ⓘ |
| hasStellarClassification | B5 V ⓘ |
| hasStellarWind | yes ⓘ |
| hasVariability | possible or low-level ⓘ |
| is |
massive
ⓘ
young ⓘ |
| isCataloguedIn | Bonner Durchmusterung NERFINISHED ⓘ |
| isImportantFor |
constraining models of circumstellar disks around massive stars
ⓘ
understanding early evolution of B-type stars ⓘ |
| isSubjectOf |
high-resolution imaging studies
ⓘ
polarimetric studies ⓘ spectroscopic studies ⓘ |
| isUsedForStudyOf |
circumstellar material
ⓘ
early stellar evolution ⓘ protoplanetary environments ⓘ |
| locatedIn |
Perseus OB2 association
NERFINISHED
ⓘ
Perseus constellation NERFINISHED ⓘ |
| memberOf | Perseus OB2 stellar association NERFINISHED ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.