Beta Gruis
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| Observation data Epoch J2000 |
|
|---|---|
| Constellation (pronunciation) |
Grus |
| Right ascension | 22h 42m 40.1s |
| Declination | -46° 53′ 05″ |
| Apparent magnitude (V) | 2.07 |
| Characteristics | |
| Spectral type | M5 III |
| U-B color index | 1.67 |
| B-V color index | 1.60 |
| Variable type | Irregular supergiant |
| Astrometry | |
| Radial velocity (Rv) | +2 km/s |
| Proper motion (μ) | RA: 135.68 mas/yr Dec.: -4.51 mas/yr |
| Parallax (π) | 19.17 ± 0.75 mas |
| Distance | 170 ± 7 ly (52 ± 2 pc) |
| Absolute magnitude (MV) | -1.52 |
| Other designations | |
Beta Gruis (β Gru / β Gruis) is a star in the constellation Grus.
It is a giant star that varies irregularly in magnitude from 2.0 to 2.3. The estimated mass is about three times that of the Sun, and it has a surface temperature of approximately 3,400° K. The total luminosity is about 3,800 that of the Sun, and it has a diameter of around 0.8 Astronomical Units.
