![]() ![]() Location of α Gruis (circled) |
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Observation data Epoch J2000 Equinox J2000 |
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Constellation | Grus |
Right ascension | 22 |
Declination | –46° 57′ 39.5078″ |
Apparent magnitude (V) | +1.74 |
Characteristics | |
Spectral type | B6 V |
U−B color index | –0.47 |
B−V color index | –0.13 |
Astrometry | |
Radial velocity (Rv) | +11.8 km/s |
Proper motion (μ) | RA: +126.69 mas/yr |
Parallax (π) | 32.29 ± 0.21mas |
Distance | 101.0 ± 0.7 ly (31.0 ± 0.2 pc) |
Details | |
Mass | 4.0M☉ |
Radius | 3.4R☉ |
Luminosity | 263L☉ |
Surface gravity (log g) | 3.76 ± 0.11 |
Temperature | 13,920K |
Metallicity [Fe/H] | –0.13 ± 0.02dex |
Rotational velocity (v sin i) | 215 km/s |
Age | 0.10Gyr |
Other designations | |
Al Na'ir, CD -47°14063, FK5 829, GCTP 5339.00, Gl 848.2, HD 209952, HIP 109268, HR 8425, SAO 230992.
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