Delta Virginis
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| Observation data Epoch J2000 |
|
|---|---|
| Constellation (pronunciation) |
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.
[edit] Etymology
The medieval names Auva, Al Awwa, and Minelauva are from the Arabic عوى cawwa’ "barking (dog)".
[edit] External links
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