Astronomy:HD 108147 b
.jpg) The exoplanet HD 108147 b (min mass ~0.4 MJ) rendered by Celestia | |
| Discovery | |
|---|---|
| Discovered by | Pepe, Mayor, Galland et al. |
| Discovery site | La Silla Observatory, Chile |
| Discovery date | April 15, 2000[1] |
| Doppler spectroscopy (CORALIE) | |
| Orbital characteristics | |
| 0.104 AU (15,600,000 km) | |
| Eccentricity | 0.498 ± 0.025 |
| Orbital period | 10.901 ± 0.001 d |
| astron|astron|helion}} | 2,451,591.6 ± 0.1 |
| 318 ± 3.03 | |
| Semi-amplitude | 25.1 ± 6.1 |
| Star | HD 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]
See also
References
- ↑ "Exoplanets Galore!" (Press release). Garching, Germany: European Southern Observatory. April 15, 2000. Retrieved December 30, 2012.
- ↑ Pepe, F. et al. (2002). "The CORALIE survey for southern extra-solar planets VII. Two short-period Saturnian companions to HD 108147 and HD 168746". Astronomy and Astrophysics 388 (2): 632–638. doi:10.1051/0004-6361:20020433. Bibcode: 2002A&A...388..632P. https://www.aanda.org/articles/aa/full/2002/23/aah3477/aah3477.html.
- ↑ NameExoWorlds Paraguay. http://www.nameexoworlds.iau.org/paraguay.
External links
Coordinates: 
12h 25m 46.2686s, −64° 01′ 19.516″
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