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HR 8799 e

HR 8799 e is a large exoplanet, orbiting the star HR 8799, which lies 129 light-years from Earth. This gas giant has 7.5 times the mass of Jupiter and 1.13 times its radius. Due to their young age, all four discovered planets in the HR 8799 system are large, compared to all gas giants in the Solar System.

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Detection method
Direct imaging
Discovered by
Marois et al.
Discovery date
November 1, 2010 (announced) November 22, 2010 (published)
Discovery site
Keck and Gemini observatories in Hawaii
Eccentricity
0.150±0.004: 6
Inclination
26.5±0.5: 6 °

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Description

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HR 8799 e

Nodes34
Edges33
Triples49
Avg. degree1.94
Density0.058824
Components1

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HR 8799 e

Top relations

related to Observations · 13
HR 8799 e → European Southern Observatory, GRAVITY, HR, In, March, On, Palomar Observatory, Sylvestre Lacour, Team, There, This, Very Large Telescope, VLTI
related to Discovery · 12
HR 8799 e → Astrophysics, Christian Marois, HR, Institute, Keck Observatory, Large Binocular Telescope, National Research Council's Herzberg, November, Observations, Thayne Currie, They, Very Large Telescope
related to Description · 8
HR 8799 e → AU, HR, It, Saturn, Solar System, The, This, Uranus
is a · 2
HR 8799 e → innermost known planet as it orbits closer to its star than the other three known planets in this planetary system, large exoplanet
Detection method · 1
HR 8799 e → Direct imaging
Discovered by · 1
HR 8799 e → Marois et al.
Discovery date · 1
HR 8799 e → November 1, 2010 (announced) November 22, 2010 (published)
Discovery site · 1
HR 8799 e → Keck and Gemini observatories in Hawaii
Eccentricity · 1
HR 8799 e → 0.150±0.004: 6
Inclination · 1
HR 8799 e → 26.5±0.5: 6 °

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Important terminology

hr 8799 planet gas large observations gravity methane carbon atmosphere system star detection spectral giant mass exoplanet discovery announced young

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
HR 8799 eDetection methodDirect imaging1.00infobox
HR 8799 eDiscovered byMarois et al.1.00infobox
HR 8799 eDiscovery dateNovember 1, 2010 (announced) November 22, 2010 (published)1.00infobox
HR 8799 eDiscovery siteKeck and Gemini observatories in Hawaii1.00infobox
HR 8799 eEccentricity0.150±0.004: 61.00infobox
HR 8799 eInclination26.5±0.5: 6 °1.00infobox
HR 8799 eMass7.5±0.6: 6 MJ1.00infobox
HR 8799 eMean radius1.13±0.05: 25 RJ1.00infobox
HR 8799 eOrbital period (sidereal)52.37: 13 years1.00infobox
HR 8799 eSemi-major axis16.00±0.10: 6 AU1.00infobox
HR 8799 eSpectral type~L71.00infobox
HR 8799 eStarHR 87991.00infobox
HR 8799 eSurface gravity104.18+0.06 −0.05: 25 cgs1.00infobox
HR 8799 eTemperature1,138+30 −22: 25 K1.00infobox
HR 8799 eis alarge exoplanet0.90text
HR 8799 eis ainnermost known planet as it orbits closer to its star than the other three known planets in this planetary system0.90text

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