Statements (29)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:star
|
| gptkbp:apparentMagnitude |
8.6
|
| gptkbp:catalogue |
gptkb:Henry_Draper_Catalogue
gptkb:Bonner_Durchmusterung |
| gptkbp:colorIndexB-V |
-0.62
+0.36 |
| gptkbp:constellation |
gptkb:Cassiopeia
|
| gptkbp:declination |
+58° 31′ 22″
|
| gptkbp:diameter |
~50 solar radii
|
| gptkbp:discoveredBy |
gptkb:Friedrich_Argelander
|
| gptkbp:discoveredIn |
1859
|
| gptkbp:distance |
~2,000 parsecs
|
| gptkbp:HD_number |
gptkb:HD_25914
|
| https://www.w3.org/2000/01/rdf-schema#label |
BD+57 521
|
| gptkbp:luminosity |
Ia
~200,000 solar luminosities |
| gptkbp:mass |
~20 solar masses
|
| gptkbp:otherDesignation |
gptkb:V481_Cas
|
| gptkbp:parallax |
0.51 mas
|
| gptkbp:properMotionRA |
-1.13 mas/yr
-0.13 mas/yr |
| gptkbp:radialVelocity |
-45 km/s
|
| gptkbp:rightAscension |
01h 16m 00.5s
|
| gptkbp:SIMBAD_identifier |
gptkb:BD+57_521
|
| gptkbp:spectralType |
B2.5Ia
|
| gptkbp:temperature |
16,000 K
|
| gptkbp:variableType |
gptkb:Alpha_Cygni_variable
|
| gptkbp:bfsParent |
gptkb:S_Persei
|
| gptkbp:bfsLayer |
7
|