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gptkbp:instance_of
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gptkb:star
|
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gptkbp:bfsLayer
|
8
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gptkbp:bfsParent
|
gptkb:HR_8799_b
|
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gptkbp:age
|
approximately 30 million years
|
|
gptkbp:average_temperature
|
approximately 1,200 K
|
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gptkbp:country
|
gptkb:HR_8799_b
gptkb:HR_8799_c
gptkb:HR_8799_d
gptkb:HR_8799_e
|
|
gptkbp:depicted_in
|
gptkb:battle
|
|
gptkbp:discovered_by
|
gptkb:2008
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gptkbp:has_color
|
B-V = 0.1
|
|
gptkbp:has_luminosity
|
approximately 10 times that of the Sun
|
|
gptkbp:has_spectral_type
|
gptkb:A5_V
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
HR 8799
|
|
gptkbp:is_approximately
|
129 light-years away from Earth
|
|
gptkbp:is_considered
|
one of the first systems with direct imaging of exoplanets
|
|
gptkbp:is_known_for
|
hosting multiple exoplanets
|
|
gptkbp:is_observed_in
|
gptkb:Gemini_Observatory
gptkb:Hubble_Space_Telescope
gptkb:Keck_Observatory
|
|
gptkbp:is_part_of
|
gptkb:Milky_Way_galaxy
stellar population studies
exoplanetary research
exoplanet discovery history
|
|
gptkbp:is_studied_in
|
gptkb:observatory
atmospheric composition of its planets
|
|
gptkbp:lighting
|
magnitude 6.5
|
|
gptkbp:located_in
|
constellation Pegasus
|
|
gptkbp:mass
|
1.5 times the mass of the Sun
|
|
gptkbp:orbital_period
|
approximately 100 years
|
|
gptkbp:type_of
|
A-type main-sequence star
|