Properties (50)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
star
|
| gptkbp:category |
a giant star
a target for amateur astronomers |
| gptkbp:has |
also_known_as_Alpha_Cephei
|
| gptkbp:hasDescription |
HD 213307
|
| gptkbp:hasFacilities |
about 2.5 solar masses
|
| gptkbp:hasGoals |
about 10 solar radii
|
| gptkbp:hasHistoricalSignificance |
noted in ancient star catalogs
|
| gptkbp:hasPersonnel |
approximately 1.5 billion years
|
| gptkbp:hasProductLine |
-0.020 arcseconds/year
-0.045 arcseconds/year |
| gptkbp:hasRecognition |
3.73
|
| gptkbp:hasRelatedPatent |
K3III
|
| gptkbp:hasTechnology |
about 4,800 K
|
| https://www.w3.org/2000/01/rdf-schema#label |
Epsilon Cephei
|
| gptkbp:isA |
red giant star
|
| gptkbp:isAccessibleBy |
true
|
| gptkbp:isAssociatedWith |
the constellation's mythology
the_mythological_figure_of_Cepheus |
| gptkbp:isChallengedBy |
Epsilon_Cephei_B_(companion_star)
|
| gptkbp:isFiledIn |
+1.45
|
| gptkbp:isLocatedIn |
constellation_Cepheus
|
| gptkbp:isNotedFor |
its brightness and visibility
its brightness in the night sky its role in the history of astronomy its historical observations by astronomers. its position in the celestial coordinate system its role in the study of stellar dynamics its stability as a star its_relatively_close_proximity_to_Earth |
| gptkbp:isPartOf |
Milky Way
the northern celestial hemisphere the celestial sphere the study of red giants the spectral classification system the study of stellar populations the astronomical community's observations the_Bayer_designation_system the_Cepheus_constellation_group |
| gptkbp:isRelatedTo |
stellar evolution studies
|
| gptkbp:isServedBy |
ground-based telescopes
various astronomical studies |
| gptkbp:isStudiedIn |
its chemical composition
its light curve variations |
| gptkbp:isUsedIn |
stellar distance measurements
navigation by astronomers |
| gptkbp:isUtilizedIn |
the Hipparcos catalog
the autumn sky |
| gptkbp:length |
approximately 45 light years
|
| gptkbp:resolution |
about 50 times that of the Sun
|