| Observation data Epoch J2000.0 Equinox J2000.0 |
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|---|---|
| Constellation | Capricornus |
| Right ascension | 20h27m19.2s |
| Declination | −18°12′42″ |
| Apparent magnitude (V) | +5.08 |
| Distance | 670 ± 110 ly (204 ± 33 pc) |
| Spectral type | B8II-III |
| Other designations | |
Pi Capricorni (π Cap, π Capricorni) is a double star in the constellation Capricornus. It also has the traditional star name Okul or Oculus (meaning eye in Latin)[1]. It is approximately 670 light years from Earth.
In Chinese, 牛宿 (Niú Su), meaning Ox (asterism), refers to an asterism consisting of π Capricorni, β Capricorni, α2 Capricorni, ξ2 Capricorni, ο Capricorni and ρ Capricorni.[2] Consequently, π Capricorni itself is known as 牛宿四 (Niú Su sì, English: the Fourth Star of Ox.)[3]
The primary component, π Capricorni A, is a blue-white B-type bright giant with an apparent magnitude of +5.08. It is a spectroscopic binary whose two components are separated by 0.1 arcseconds. The third component, π Capricorni B, is an eighth magnitude star 3.4 arcseconds from the primary.
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