HD 108147 b

HD 108147 b / Tumearandu
The exoplanet HD 108147 b (min mass ~0.4 MJ) rendered by Celestia
Discovery
Discovered byPepe, Mayor,
Galland et al.
Discovery siteLa Silla Observatory, Chile
Discovery dateApril 15, 2000[1]
Doppler spectroscopy
(CORALIE)
Orbital characteristics
0.104 AU (15,600,000 km)
Eccentricity0.498 ± 0.025
10.901 ± 0.001 d
2,451,591.6 ± 0.1
318 ± 3.03
Semi-amplitude25.1 ± 6.1
StarHD 108147

HD 108147 b, also named Tumearandu, is a gas giant exoplanet with a minimum mass about half that of Jupiter. It orbits the star in a very tight "torch orbit". The distance between the planet and the star is only a tenth of the distance between Earth and the Sun (0.1AU).[2] A number of such worlds are known to exist, but the eccentricity of this planet is unusually high. Planets orbiting very close to their parent stars usually have round orbits because of the tidal forces between the bodies.

In December 2019, the International Astronomical Union announced the exoplanet will bear the name Tumearandu, after the popular character Tumé Arandú of the folklore of Paraguay. The name was a result of a contest ran in Paraguay by the Centro Paraguayo de Informaciones Astronómicas, along with the IAU100 NameExoWorlds 2019 global contest.[3]

  1. ^ Cite error: The named reference eso0019 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference Pepe2002 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference IAU100 was invoked but never defined (see the help page).