Omega1 Aquilae
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Aquila |
| Right ascension | 19h 17m 48.999s |
| Declination | +11° 35′ 43.53″ |
| Apparent magnitude (V) | 5.284 |
| Characteristics | |
| Evolutionary stage | subgiant |
| Spectral type | F0 IV |
| U−B color index | +0.204 |
| B−V color index | +0.238 |
| Astrometry | |
| Radial velocity (Rv) | −14.3 km/s |
| Proper motion (μ) | RA: +1.070 mas/yr Dec.: +13.640 mas/yr |
| Parallax (π) | 8.266±0.0721 mas |
| Distance | 395 ± 3 ly (121 ± 1 pc) |
| Absolute magnitude (MV) | −0.24 |
| Details | |
| Mass | 2.85±0.06 M☉ |
| Radius | 5.38±0.03 R☉ |
| Luminosity | 92.2±1.6 L☉ |
| Surface gravity (log g) | 3.26 cgs |
| Temperature | 7,648+15 −14 K |
| Rotational velocity (v sin i) | 89 km/s |
| Age | 456+129 −49 Myr |
| Other designations | |
| ω1 Aql, 25 Aquilae, BD+11°3790, FK5 725, GC 26609, HD 180868, HIP 94834, HR 7315, SAO 104691, PPM 136078 | |
| Database references | |
| SIMBAD | data |
Omega1 Aquilae is a single star in the equatorial constellation of Aquila. Its name is a Bayer designation that is Latinized from ω1 Aquilae, and abbreviated Omega1 Aql or ω1 Aql. With an apparent visual magnitude of 5.2 it is a faint, yellow-white hued star that can be seen with the naked eye in dark skies. From the annual parallax shift of 8.27 mas, the distance to this star can be estimated as 395 light-years (121 parsecs), give or take a 3 light year margin of error. It is drifting closer to the Sun with a radial velocity of −14 km/s.
The spectrum of this star fits a stellar classification of F0 IV. Typically, a luminosity class of IV means that the star is in the subgiant stage. It is rotating rapidly with a projected rotational velocity of 89 km/s. The star has 2.85 times the mass of the Sun and five times the Sun's radius. It is radiating 85 times the luminosity of the Sun from its photosphere at an effective temperature of 7,766 K.