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gptkbp:instanceOf
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gptkb:star
variable star
red supergiant
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gptkbp:apparentMagnitude
|
3.44
-7.6
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gptkbp:catalogueNumber
|
gptkb:BD+58_2316
gptkb:HD_206936
gptkb:HIP_107259
gptkb:HR_8316
gptkb:SAO_33693
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gptkbp:colorIndexB-V
|
+2.26
+2.38
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gptkbp:constellationAbbreviation
|
gptkb:Cep
|
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gptkbp:declination
|
+58° 46′ 48″
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gptkbp:diameter
|
about 1,260 solar radii
|
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gptkbp:discoveredBy
|
gptkb:William_Herschel
|
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gptkbp:discoveredIn
|
1783
|
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gptkbp:distanceFromEarth
|
approximately 2,400 light-years
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|
gptkbp:epoch
|
gptkb:J2000
|
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gptkbp:evolutionaryStage
|
late stage supergiant
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|
https://www.w3.org/2000/01/rdf-schema#label
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Mu Cephei
|
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gptkbp:locatedIn
|
gptkb:constellation_Cepheus
|
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gptkbp:luminosity
|
about 350,000 times the Sun
|
|
gptkbp:mass
|
about 19.2 solar masses
|
|
gptkbp:metallicity
|
[Fe/H] = -0.16
|
|
gptkbp:notableFor
|
deep red color visible to the naked eye
one of the largest and most luminous stars known
|
|
gptkbp:otherName
|
gptkb:Erakis
gptkb:Herschel's_Garnet_Star
|
|
gptkbp:parallax
|
1.64 mas
|
|
gptkbp:properMotionRA
|
-1.55 mas/yr
-3.86 mas/yr
|
|
gptkbp:rightAscension
|
21h 43m 30.4s
|
|
gptkbp:spectralType
|
M2 Ia
|
|
gptkbp:temperature
|
3,750 K
|
|
gptkbp:variableStar
|
gptkb:V509_Cephei
|
|
gptkbp:variant
|
semiregular variable
|
|
gptkbp:bfsParent
|
gptkb:Cepheus
|
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gptkbp:bfsLayer
|
6
|