HR 8799 e

HR 8799 e
Artistic rendering of HR 8799 e as a hot gas giant
Discovery
Discovered byMarois et al.
Discovery siteKeck and Gemini
observatories in Hawaii
Discovery dateNovember 1, 2010 (announced)
November 22, 2010 (published)
Direct imaging
Orbital characteristics
~ 14.5 ± 0.5[1][note 1] AU
16.4+2.1
−1.1[2] AU
Eccentricity0.15 ± 0.08[2]
~ 50[1][note 1] y
Inclination25 ± 8[2]°
StarHR 8799
Physical characteristics
1.17+0.13
−0.11 RJ[2]
Mass9.6+1.9
−1.8 MJ[3]
104.3 ± 0.3[2] cm s−2
Temperature1,000 [4] K
1150 ± 50[2] K
Spectral type
~L7[2]
  1. ^ a b Value given assuming the planet's orbit is circular and is being observed face-on.

HR 8799 e is a large exoplanet, orbiting the star HR 8799, which lies 129 light-years from Earth. This gas giant is between 5 and 10 times the mass of Jupiter.[1] Due to their young age and high temperature all four discovered planets in the HR 8799 system are large, compared to all gas giants in the Solar System.

  1. ^ a b c Cite error: The named reference Marois2011 was invoked but never defined (see the help page).
  2. ^ a b c d e f g Cite error: The named reference Gravity Collaboration was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Brandt2021 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Skemer2012 was invoked but never defined (see the help page).