|
gptkbp:instanceOf
|
gptkb:star
concert hall
|
|
gptkbp:age
|
30–90 million years
|
|
gptkbp:apparentMagnitude
|
5.96
|
|
gptkbp:containsPlanet
|
gptkb:HR_8799_b
gptkb:HR_8799_c
gptkb:HR_8799_d
gptkb:HR_8799_e
|
|
gptkbp:declination
|
+21° 08′ 03.302″
|
|
gptkbp:diameter
|
1.34 solar radii
|
|
gptkbp:discoveredBy
|
gptkb:Edward_Emerson_Barnard
|
|
gptkbp:discoveredIn
|
1897
|
|
gptkbp:distanceFromEarth
|
129 light-years
|
|
gptkbp:firstDirectlyImagedExoplanetSystem
|
yes
|
|
gptkbp:hasDebrisDisk
|
yes
|
|
gptkbp:hasInfraredExcess
|
yes
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
HR 8799
|
|
gptkbp:locatedIn
|
constellation Pegasus
|
|
gptkbp:luminosity
|
4.92 solar luminosities
|
|
gptkbp:mass
|
1.5 solar masses
|
|
gptkbp:metallicity
|
[Fe/H] = -0.47
|
|
gptkbp:otherDesignation
|
gptkb:2MASS_J23072853+2108037
gptkb:BD+21_4584
gptkb:GJ_8799
gptkb:HD_218396
gptkb:HIP_114189
gptkb:SAO_91161
|
|
gptkbp:parallax
|
25.38 mas
|
|
gptkbp:partOf
|
gptkb:HR_8799_planetary_system
|
|
gptkbp:rightAscension
|
23h 07m 28.7157s
|
|
gptkbp:rotationPeriod
|
49 km/s
|
|
gptkbp:spectralType
|
A5V
|
|
gptkbp:variableStar
|
gptkb:γ_Doradus_variable
|
|
gptkbp:bfsParent
|
gptkb:exoplanetary_systems
|
|
gptkbp:bfsLayer
|
6
|