Alpha Gruis
From Wikipedia, the free encyclopedia
| Observation data Epoch J2000 |
|
|---|---|
| Constellation | Grus |
| Right ascension | 22h 08m 14.0s |
| Declination | -46° 57′ 39.5″ |
| Apparent magnitude (V) | +1.73 |
| Spectral Characteristics | |
| Spectral type | B7 IV |
| U-B color index | -0.46 |
| B-V color index | -0.13 |
| Variable type | None |
| Astrometry | |
| Radial velocity (Rv) | +10.9 km/s |
| Proper motion (μ) | RA: 127.6 mas/yr Dec.: -147.9 mas/yr |
| Parallax (π) | 32.16 ± 0.82 mas |
| Distance | 101 ± 3 ly (31.1 ± 0.8 pc) |
| Absolute magnitude (MV) | -0.74 |
| Physical Characteristics | |
| Mass | ? M☉ |
| Radius | 3.6 R☉ |
| Luminosity | 380 L☉ |
| Temperature | 13,500 K |
| Metallicity | ? |
| Rotation | ~236 km/s. |
| Age | ? years |
| Other designations | |
Alpha Gruis (α Gru / α Gruis) is the brighest star in the constellation Grus. It also has the traditional name Al Na'ir (also known as Al Nair or Alnair, from the Arabic meaning "the light" or "the bright one") and is also known with the name The Persian[1]. Confusingly, Alnair is also a name for Zeta Centauri.
 |
This subgiant star-related article is a stub. You can help Wikipedia by expanding it. |
