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ζ Arae (above η) in the Ara Constellation |
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| Observation data Epoch J2000 Equinox J2000 |
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|---|---|
| Constellation | Ara |
| Right ascension | 16h 58m 37.2117s |
| Declination | -55° 59′ 24.507″ |
| Apparent magnitude (V) | 3.127 |
| Characteristics | |
| Spectral type | K3III |
| U−B color index | 1.97 |
| B−V color index | 1.6 |
| Astrometry | |
| Radial velocity (Rv) | -6.0 km/s |
| Proper motion (μ) | RA: -18.31 mas/yr Dec.: -35.29 mas/yr |
| Parallax (π) | 5.68 ± 0.91 mas |
| Distance | approx. 570 ly (approx. 180 pc) |
| Absolute magnitude (MV) | 4.77 |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) |
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Zeta Arae (ζ Ara, ζ Arae) is a star in the constellation Ara. It is an orange K-type giant with an apparent magnitude of +3.12. It is approximately 574 light years from Earth.
This star sometimes is called by the name Tseen Yin, together with δ Arae. [1]
In Chinese, 杵 (Guī), meaning Tortoise, refers to an asterism consisting of ζ Arae, ε1 Arae, γ Arae, δ Arae and η Arae.[2] Consequently, ζ Arae itself is known as 龜五 (Guī wǔ, English: the Fifth Star of Tortoise.)[3]
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