| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Virgo |
| Right ascension | 12h 55m 36.2s |
| Declination | +3° 23′ 51″ |
| Apparent magnitude (V) | 3.38 |
| Characteristics | |
| Spectral type | M3+ III |
| U−B color index | 1.78 |
| B−V color index | 1.58 |
| Variable type | Semiregular |
| Astrometry | |
| Radial velocity (Rv) | -17.8 km/s |
| Proper motion (μ) | RA: -471.44 mas/yr Dec.: -52.81 mas/yr |
| Parallax (π) | 16.11 ± 0.88 mas |
| Distance | 202 ly (62 pc) |
| Absolute magnitude (MV) | -0.58 |
| Details | |
| Mass | 1.5-2 M☉ |
| Radius | 65 R☉ |
| Luminosity | 630 L☉ |
| Temperature | 3,720 K |
| Metallicity | ? |
| Rotation | ? |
| Age | ? years |
| Other designations | |
Delta Virginis (δ Vir, δ Virginis) is a red giant star in the constellation Virgo. It also has the traditional name Auva.
It has a spectral type of M3-III, and an magnitude of 3.38, bright enough to be seen with the naked eye. It is classified as a semiregular variable star and its brightness varies from magnitude +3.32 to +3.40.
Delta Virginis is a possible binary star, as an 11th magnitude star is located only 80 arcseconds from it. This type K dwarf is believed to have an orbital period of over 200,000 years, but this has not been confirmed.
The medieval names Auva, Al Awwa, and Minelauva are from the Arabic عوى cawwa’ "barking (dog)".
This star, along with β Vir(Zavijava), γ Vir (Porrima), η Vir (Zaniah) and ε Vir (Vindemiatrix), were Al ʽAwwāʼ, the Barker.[1]
In Chinese, 太微左垣 (Tài Wēi Zuǒ Yuán), meaning Left Wall of Supreme Palace Enclosure, refers to an asterism consisting of δ Virginis, η Virginis, γ Virginis, ε Virginis and α Comae Berenices.[2] Consequently, δ Virginis itself is known as 太微左垣三 (Tài Wēi Zuǒ Yuán sān, English: the Third Star of Left Wall of Supreme Palace Enclosure.),[3] representing 東次相 (Dōngcìxiāng), meaning The Second Eastern Minister.[4] 東次相 (Dōngcìxiāng), westernized into Tsze Seang by R.H. Allen and the meaning is "the Second Minister of State" [5]
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