Alpha Gruis

Location of α Gruis (circled)
Observation data
Epoch J2000      Equinox J2000
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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Alnair, which is released under the Creative Commons Attribution-Share-Alike License 3.0