Gamma Aquilae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 19h 46m 15.58029s |
| Declination | +10° 36′ 47.7408″ |
| Apparent magnitude (V) | +2.712 |
| Characteristics | |
| Spectral type | K3 II |
| U−B color index | +1.720 |
| B−V color index | +1.500 |
| Astrometry | |
| Radial velocity (Rv) | −2.79 km/s |
| Proper motion (μ) | RA: +16.99 mas/yr Dec.: −2.98 mas/yr |
| Parallax (π) | 8.26±0.17 mas |
| Distance | 395 ± 8 ly (121 ± 2 pc) |
| Absolute magnitude (MV) | −3.38+0.24 −0.22 |
| Details | |
| Mass | 3.51±0.23 M☉ |
| Radius | 91.81+2.19 −2.12 R☉ |
| Luminosity | 2,146±139 L☉ |
| Surface gravity (log g) | 1.52 cgs |
| Temperature | 4,098±56 K |
| Metallicity [Fe/H] | −0.29 dex |
| Rotational velocity (v sin i) | 8 km/s |
| Age | 270±40 Myr |
| Other designations | |
| Tarazed, Reda, Gamma Aql, γ Aql, 50 Aql, BD+10 4043, FK5 741, HD 186791, HIP 97278, HR 7525, SAO 105223 | |
| Database references | |
| SIMBAD | data |
Gamma Aquilae is a star in the constellation of Aquila. Its name is a Bayer designation that is Latinized from γ Aquilae, and abbreviated gamma Aql or γ Aql. The star is formally known as Tarazed, pronounced /ˈtærəzɛd/. It has an apparent visual magnitude of 2.712, making it readily visible to the naked eye at night. Parallax measurements place it at a distance of 395 light-years (121 parsecs) from the Sun. The star is drifting closer to the Sun with a radial velocity of −2.8 km/s.