Eta Capricorni
Binary star system in Capricornus visible to the naked eye.
Eta Capricorni, Latinized from η Capricorni, is a binary star system in the southern constellation of Capricornus. It has a combined apparent visual magnitude of +4.84 and is located about 196 light-years from the Sun. The system is visible to the naked eye.
Quick Facts
- Bayer designation
- η Capricorni
- Apparent visual magnitude (combined)
- +4.84
- Distance from sun
- 196 ly
- Orbital period
- 27.85 years
- Semimajor axis
- 0.265 arc seconds
- Orbital eccentricity
- 0.410
- Primary apparent magnitude
- +5.02
- Secondary apparent magnitude
- +7.39
Facts from the source article.
Nomenclature
Eta Capricorni, also known by the Bayer designation η Capricorni or the Flamsteed number 22 Capricorni, is a star system. In Chinese astronomy, it belongs to the asterism Twelve States, which includes sixteen stars such as φ Capricorni and ι Capricorni, representing ancient states from the Spring and Autumn and Warring States periods. The Chinese name for η Capricorni itself, along with 21 Capricorni and β Serpentis, is linked to the Zhou dynasty, located in the Right Wall of the Heavenly Market Enclosure asterism. In astrological contexts, this star is occasionally called Armus.
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