Herschel's Garnet Star

URI: https://gptkb.org/entity/Herschel's_Garnet_Star
GPTKB entity
Statements (46)
Predicate Object
gptkbp:instanceOf gptkb:star
variable star
gptkbp:apparentMagnitude 4.08
gptkbp:catalogueNumber gptkb:FK5_841
gptkb:BD+58_2316
gptkb:HD_206936
gptkb:HIP_107259
gptkb:HR_8316
gptkb:SAO_33693
GC 30416
2MASS J21433047+5846481
ADS 15184 A
AG+58 2102
GSC 03966-02816
IRC +60390
PLX 4992
PPM 41906
TYC 3966-2816-1
WDS J21434+5847A
gptkbp:colorIndexB-V +2.26
+2.38
gptkbp:constellation gptkb:Cepheus
gptkbp:declination +58° 46′ 48.2″
gptkbp:diameter ~1,000 times Sun
gptkbp:discoveredBy gptkb:William_Herschel
gptkbp:distanceFromEarth ~2,400 light years
gptkbp:epoch gptkb:J2000
gptkbp:galaxyType red supergiant
https://www.w3.org/2000/01/rdf-schema#label Herschel's Garnet Star
gptkbp:luminosity ~38,000 times Sun
gptkbp:mass ~19 solar masses
gptkbp:metallicity [Fe/H] = -0.16
gptkbp:namedAfter gptkb:William_Herschel
gptkbp:notableFor one of the largest known stars
deep red color
prototype of Garnet stars
gptkbp:otherName gptkb:Mu_Cephei
gptkbp:parallax 1.64 mas
gptkbp:rightAscension 21h 43m 30.46s
gptkbp:spectralType M2Ia
gptkbp:temperature 3,750 K
gptkbp:variabilityPeriod 730 days
gptkbp:variableType semiregular variable
gptkbp:visibleToNakedEye yes
gptkbp:bfsParent gptkb:Mu_Cephei
gptkbp:bfsLayer 7