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Xi Aquilae, 59 Aquilae

Proper NameLibertas
Bayer DesignationXi Aquilae
Flamsteed Number59 Aquilae
HR (BSC)7595
Right Ascension19h 54m 15s
Declination+8° 27' 41"
Distance186 light years
57 parsecs
MagnitudeApparent: +4.71
Absolute: +0.96
Spectral ClassG9.5IIIb yellow giant
Planets in this systemFortitudo (Libertas b), gas giant
Optimum VisibilityJuly / August
NotesFalling near the bright star Altair in the sky, Libertas (or Xi Aquilae) is an evolved star that has undergone expansion into its red giant phase. It has a single known planet, named Fortitudo, which is an immense gas giant estimated to be nearly three times as massive as Jupiter, but in a much closer orbit around its star.

The brilliant foreground star to the northwest in this image is Altair or Alpha Aquilae, actually a rather less luminous star than giant Libertas, but less than a tenth of its distance from the Solar System. Imagery provided by Aladin sky atlas


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