|
gptkbp:instance_of
|
gptkb:planet
|
|
gptkbp:bfsLayer
|
7
|
|
gptkbp:bfsParent
|
gptkb:first_image_of_an_exoplanet
|
|
gptkbp:apparent_magnitude
|
15.5
|
|
gptkbp:atmosphere
|
hydrogen, helium, methane
clouds, possible weather patterns
|
|
gptkbp:average_temperature
|
approximately 1200 K
|
|
gptkbp:companion_plants
|
gptkb:HR_8799_c
gptkb:HR_8799_d
gptkb:HR_8799_e
|
|
gptkbp:depicted_in
|
gptkb:battle
|
|
gptkbp:discovered_by
|
gptkb:2008
direct imaging
|
|
gptkbp:distance
|
129 light years
|
|
gptkbp:eccentricity
|
0.1
|
|
gptkbp:has_spectral_type
|
L-type
|
|
gptkbp:hosts
|
gptkb:HR_8799
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
HR 8799 b
|
|
gptkbp:image
|
gptkb:Gemini_Observatory
gptkb:Hubble_Space_Telescope
gptkb:Keck_Observatory
|
|
gptkbp:is_considered
|
a gas giant
|
|
gptkbp:is_part_of
|
gptkb:planet
HR 8799 planetary system
|
|
gptkbp:is_studied_in
|
exoplanet researchers
|
|
gptkbp:located_in
|
gptkb:Milky_Way_Galaxy
|
|
gptkbp:location
|
constellation Pegasus
|
|
gptkbp:mass
|
7 to 10 times the mass of Jupiter
approximately 7 times the mass of Jupiter
|
|
gptkbp:mission
|
gptkb:HR_8799
|
|
gptkbp:notable_for
|
being one of the first directly imaged exoplanets.
|
|
gptkbp:orbital_inclination
|
30 degrees
|
|
gptkbp:orbital_period
|
none known
approximately 45.5 years
HR 8799 system
40.4 years
|
|
gptkbp:semi_major_axis
|
24 AU
|
|
gptkbp:year_created
|
gptkb:2008
|