| Discovery | |
|---|---|
| Discovered by | Satoet al.[1] |
| Discovery site | Okayama Planet Search Program, Japan |
| Discovery date | 19 February 2008 |
| Radial velocity | |
| Orbital characteristics | |
| 0.68 AU (102 million km) | |
| Eccentricity | 0 |
| 136.75 ± 0.25d 0.37439y | |
| 2,453,001.7 ± 1.4 | |
| Star | Xi Aquilae |
| Physical characteristics | |
| Mass | ≥2.0 and <37.1[2]MJ |
Xi Aquilae b (abbreviatedξ Aquilae b,ξ Aql b), formally namedFortitudo/fɔːrtɪˈtjuːdoʊ/, is anextrasolar planet approximately 184light-years from theSun in theconstellation ofAquila. The planet was discovered orbiting theyellow giant starXi Aquilae in 2008. The planet has a minimum mass of 2.8Jupiters and a period of 137 days.[1]
Following its discovery the planet was designated Xi Aquilae b. In July 2014 theInternational Astronomical Union (IAU) launchedNameExoWorlds, a process for giving proper names to certain exoplanets and their host stars.[3] The process involved public nomination and voting for the new names.[4] In December 2015, the IAU announced the winning name was Fortitudo for this planet.[5]
The winning name was submitted by Libertyer, a student club atHosei University ofTokyo,Japan.Fortitudo isLatin for 'fortitude'.Aquila is Latin for 'eagle', a symbol of fortitude—emotional and mental strength in the face of adversity.[6]
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