Xi Aquilae b

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Xi Aquilae b
Exoplanet List of exoplanets
Parent star
Star Xi Aquilae
Constellation Aquila
Right ascension (α) 19h 54m 15s
Declination (δ) +08° 27′ 41″
Apparent magnitude (mV) 4.72
Distance205 ± 13 ly
(62.7 ± 3.9 pc)
Spectral type G9IIIb
Orbital elements
Semi-major axis(a) 0.68 AU
(101 Gm)
    10.8 mas
Eccentricity (e) 0
Orbital period(P) 136.75 ± 0.25 d
(0.37439 y)
Time of periastron (T0) 2,453,001.7 ± 1.4 JD
Physical characteristics
Minimum mass(m sin i)2.8 MJ
Discovery information
Discovery date 19 February 2008
Discoverer(s) Sato et al.[1]
Discovery method Radial velocity
Discovery site Okayama Planet Search Program
Discovery status Published[1]
Database references
Extrasolar Planets
Exoplanet Archivedata
Open Exoplanet Cataloguedata

Xi Aquilae b (abbreviated ξ Aquilae b, ξ Aql b), also named Fortitudo, is an extrasolar planet approximately 200 light-years from the Sun in the constellation of Aquila. The planet was discovered orbiting the yellow giant star Xi Aquilae in 2008. The planet has a minimum mass of 2.8 Jupiter and a period of 137 days.[1]

Following its discovery the planet was designated Xi Aquilae b. In July 2014 the International Astronomical Union launched a process for giving proper names to certain exoplanets and their host stars.[2] The process involved public nomination and voting for the new names.[3] In December 2015, the IAU announced the winning name was Fortitudo for this planet.[4]

The winning name was submitted by Libertyer, a student club at Hosei University of Tokyo, Japan. 'Fortitudo' is Latin for 'fortitude'. 'Aquila' is Latin for 'eagle', an embodiment of fortitude - emotional and mental strength in the face of adversity.[5]

See also[edit]


External links[edit]

  • "ksi Aql". Exoplanets. Retrieved 2008-06-25. 

Coordinates: Sky map 19h 54m 15s, +08° 27′ 41″