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gptkbp:instanceOf
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gptkb:star
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gptkbp:alsoKnownAs
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gptkb:Beta_Persei
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gptkbp:apparentMagnitude
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2.12 to 3.39
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gptkbp:catalogueNumber
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gptkb:ADS_2362
gptkb:BD+40_673
gptkb:GC_3728
gptkb:HD_19356
gptkb:HIP_14576
gptkb:HR_936
gptkb:SAO_38592
gptkb:FK5_111
gptkb:WDS_J03082+4057
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gptkbp:constellation
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gptkb:Perseus
|
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gptkbp:contains
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gptkb:Algol_A
gptkb:Algol_B
gptkb:Algol_C
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gptkbp:culturalSignificance
|
known as the Demon Star
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gptkbp:declination
|
+40° 57′ 20″
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gptkbp:discoveredBy
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gptkb:John_Goodricke
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gptkbp:discoveredIn
|
1783
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gptkbp:distanceFromEarth
|
about 90 light-years
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gptkbp:eclipsingBinary
|
yes
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gptkbp:hasExoplanet
|
no known exoplanets
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https://www.w3.org/2000/01/rdf-schema#label
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Algol Star System
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gptkbp:locatedIn
|
gptkb:Perseus_constellation
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gptkbp:luminosityOfAlgolA
|
98 times solar luminosity
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gptkbp:luminosityOfAlgolB
|
4.5 times solar luminosity
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gptkbp:luminosityOfAlgolC
|
10 times solar luminosity
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gptkbp:massOfAlgolA
|
3.17 solar masses
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gptkbp:massOfAlgolB
|
0.70 solar masses
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gptkbp:massOfAlgolC
|
1.76 solar masses
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gptkbp:metallicity
|
near solar
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gptkbp:notableFor
|
first known eclipsing binary
prototype of Algol variable stars
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gptkbp:orbitalPeriodAlgolA-B
|
2.867 days
|
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gptkbp:orbitalPeriodAlgolAB-C
|
1.862 years
|
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gptkbp:parallax
|
0.85 mas
35.28 mas
|
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gptkbp:properMotionRA
|
-1.95 mas/yr
+2.43 mas/yr
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gptkbp:radialVelocity
|
+4.1 km/s
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gptkbp:radiusOfAlgolA
|
2.73 solar radii
|
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gptkbp:radiusOfAlgolB
|
3.48 solar radii
|
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gptkbp:radiusOfAlgolC
|
1.73 solar radii
|
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gptkbp:rightAscension
|
03h 08m 10.1s
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gptkbp:separationAlgolA-B
|
0.062 AU
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gptkbp:separationAlgolAB-C
|
2.69 AU
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gptkbp:spectralType
|
A7m (Algol C)
B8V (Algol A)
K0IV (Algol B)
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gptkbp:variabilityPeriod
|
2.867 days
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gptkbp:variableType
|
binary star system
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gptkbp:bfsParent
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gptkb:Phantasy_Star
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gptkbp:bfsLayer
|
7
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