Statements (31)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:star
|
| gptkbp:apparentMagnitude |
3.23
|
| gptkbp:BayerDesignation |
gptkb:Beta_Cephei
|
| gptkbp:catalogueNumber |
gptkb:ADS_14859
gptkb:BD+69_1128 gptkb:FK5_822 gptkb:GC_30113 gptkb:HR_8238 gptkb:SAO_19787 gptkb:HD_205021 gptkb:HIP_106032 gptkb:WDS_J21287+7034 |
| gptkbp:constellation |
gptkb:Cepheus
|
| gptkbp:declination |
+70° 33′ 39″
|
| gptkbp:diameter |
5.6 solar radii
|
| gptkbp:discoveredBy |
known since antiquity
|
| gptkbp:distanceFromEarth |
690 light years
|
| gptkbp:hasCompanion |
binary star system
|
| https://www.w3.org/2000/01/rdf-schema#label |
Alfirk
|
| gptkbp:luminosity |
3,900 times Sun
|
| gptkbp:mass |
8.4 solar masses
|
| gptkbp:metallicity |
-0.16
|
| gptkbp:nameMeaning |
the flock (of sheep)
|
| gptkbp:otherName |
gptkb:Beta_Cephei
|
| gptkbp:rightAscension |
21h 28m 39.6s
|
| gptkbp:rotationPeriod |
28 km/s
|
| gptkbp:spectralType |
B2III
|
| gptkbp:temperature |
26,000 K
|
| gptkbp:variableStar |
gptkb:Beta_Cephei_variable
|
| gptkbp:bfsParent |
gptkb:Beta_Cephei
|
| gptkbp:bfsLayer |
7
|