Omega1 Aquilae

Omega¹ Aquilae is a single^[8] 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^[3] 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,^[2] 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.^[6]

For other star systems with this Bayer designation, see ω Aquilae.

ω¹ Aquilae

Location of ω1 Aquilae (circled)
Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Aquila[1]
Right ascension	19h 17m 48.999s[2]
Declination	+11° 35′ 43.53″[2]
Apparent magnitude (V)	5.284[3]
Characteristics
Evolutionary stage	subgiant[4][2]
Spectral type	F0 IV[5]
U−B color index	+0.204[3]
B−V color index	+0.238[3]
Astrometry
Radial velocity (Rv)	−14.3[6] km/s
Proper motion (μ)	RA: +1.070 mas/yr[2] Dec.: +13.640 mas/yr[2]
Parallax (π)	8.266±0.0721 mas[2]
Distance	395 ± 3 ly (121 ± 1 pc)
Absolute magnitude (MV)	−0.24[1]
Details
Mass	2.85±0.06[4] M☉
Radius	5.38±0.03[2] R☉
Luminosity	92.2±1.6[2] L☉
Surface gravity (log g)	3.26[2] cgs
Temperature	7,648+15 −14[2] K
Rotational velocity (v sin i)	89[4] km/s
Age	456+129 −49[2] Myr
Other designations
ω1 Aql, 25 Aquilae, BD+11°3790, FK5 725, GC 26609, HD 180868, HIP 94834, HR 7315, SAO 104691, PPM 136078[7]
Database references
SIMBAD	data

The spectrum of this star fits a stellar classification of F0 IV.^[5] 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.^[4] The star has 2.85 times the mass of the Sun^[4] 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.^[2]