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Deneb al Okab, Deneb el Okab, Zeta Aquilae, 17 Aquilae

Proper NamesOkab, Deneb al Okab, Deneb el Okab
Bayer DesignationZeta Aquilae
Flamsteed Number17 Aquilae
HR (BSC)7235
Right Ascension19h 5m 25s
Declination+13° 51' 49"
Distance83 light years
25 parsecs
MagnitudeApparent: +3.0
Absolute: +1.0
Spectral ClassA0Vn white main sequence star
Optimum VisibilityJuly
NotesOne of several stars in Aquila with confusingly similar names. This star, in combination with nearby Epsilon Aquilae, historically formed the 'tail of the Eagle', or Deneb al Okab. That name came to be applied to both Zeta and Epsilon individually, and also to Delta Aquilae in the centre of the constellation. The formally recognised name of Zeta Aquilae is now Okab, meaning simply 'Eagle'.


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