|
gptkbp:instanceOf
|
gptkb:star
variable star
|
|
gptkbp:age
|
10 billion years
|
|
gptkbp:apparentMagnitude
|
+0.75
7.06–8.12
|
|
gptkbp:catalogue
|
gptkb:GSC_Catalogue
gptkb:HR_Catalogue
gptkb:Henry_Draper_Catalogue
gptkb:Hipparcos_Catalogue
gptkb:BD_Catalogue
gptkb:2MASS
gptkb:Bright_Star_Catalogue
gptkb:SAO_Catalogue
|
|
gptkbp:declination
|
+42° 47′ 03″
|
|
gptkbp:diameter
|
5.1 solar radii
|
|
gptkbp:discoveredBy
|
gptkb:Williamina_Fleming
|
|
gptkbp:discoveredIn
|
1899
|
|
gptkbp:distanceFromEarth
|
860 light-years
|
|
gptkbp:heliumContent
|
low
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
RR Lyrae
|
|
gptkbp:lightCurveType
|
sawtooth
|
|
gptkbp:locatedIn
|
constellation Lyra
|
|
gptkbp:luminosity
|
40–50 times Sun
|
|
gptkbp:mass
|
0.65 solar masses
|
|
gptkbp:metalContent
|
low
|
|
gptkbp:metallicity
|
[Fe/H] = –1.39
|
|
gptkbp:namedAfter
|
gptkb:RR_Lyrae_variable_stars
|
|
gptkbp:notableFor
|
prototype of RR Lyrae variables
|
|
gptkbp:otherDesignation
|
gptkb:2MASS_J19252792+4247032
gptkb:BD+42_3338
gptkb:GSC_03153-01397
gptkb:HD_182989
gptkb:HIP_95497
gptkb:HR_7387
gptkb:SAO_47857
|
|
gptkbp:parallax
|
0.20 mas
3.80 mas
|
|
gptkbp:period
|
0.56686776 days
|
|
gptkbp:properMotionRA
|
–2.63 mas/yr
–77.16 mas/yr
|
|
gptkbp:pulsationMode
|
fundamental mode
|
|
gptkbp:radialVelocity
|
–73.5 km/s
|
|
gptkbp:rightAscension
|
19h 25m 27.9s
|
|
gptkbp:spectralType
|
A7-F8
|
|
gptkbp:stellarPopulation
|
gptkb:Population_II
|
|
gptkbp:temperature
|
6,500 K
|
|
gptkbp:variableType
|
pulsating variable
|
|
gptkbp:bfsParent
|
gptkb:Lyra
gptkb:variable_star
|
|
gptkbp:bfsLayer
|
6
|