  | |
| Observation data EpochJ2000.0 EquinoxJ2000.0 (ICRS) | |
|---|---|
| Constellation | Aquila[1] |
| Right ascension | 19h 19m 53.067s[2] |
| Declination | +11° 32′ 05.87″[2] |
| Apparent magnitude (V) | 6.03[1] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | A2 V[4] or F0V[5] |
| U−Bcolor index | +0.087±0.007[1] |
| B−Vcolor index | +0.08[6] |
| Astrometry | |
| Radial velocity (Rv) | −26.0±4.3[7][1] km/s |
| Proper motion (μ) | RA: 44.335mas/yr[2] Dec.: 22.475mas/yr[2] |
| Parallax (π) | 11.6957±0.0366 mas[2] |
| Distance | 278.9 ± 0.9 ly (85.5 ± 0.3 pc) |
| Absolute magnitude (MV) | 1.48[1] |
| Details | |
| Mass | 2.10±0.33[3] M☉ |
| Radius | 2.25±0.07[3] R☉ |
| Luminosity | 23.4±1.0[3] L☉ |
| Surface gravity (log g) | 4.06±0.07[3] cgs |
| Temperature | 8,472±125[3] K |
| Rotational velocity (v sin i) | 152[8] km/s |
| Age | 224[8] Myr |
| Other designations | |
| ω2 Aql,29 Aquilae,BD+11°3802,GC 26660,HD 181383,HIP 95002,HR 7332,SAO 104728,PPM 136128[9] | |
| Database references | |
| SIMBAD | data |
Omega2 Aquilae is astar in theequatorialconstellation ofAquila, the eagle.[9] Its name is aBayer designation that isLatinized fromω2 Aquilae, and abbreviated Omega2 Aql or ω2 Aql. This star has anapparent visual magnitude of 6.0,[1] which is close to the lower limit of detectability with thenaked eye. According to theBortle Dark-Sky Scale, this star can be viewed from dark rural skies. As the Earth orbits about the Sun, this star undergoes aparallax shift of11.7 mas.[10] This is equivalent to a physical distance of 279light-years (86parsecs) from Earth. The star is drifting closer to the Sun with aradial velocity of −26 km/s.[1]
Analysis of thespectrum of this white-hued star shows it to match astellar classification of A2 V,[4] indicating it is anA-type main sequence star. (A 2001 study found a discrepant class of F0V.[5]) It has about 2.25 the size and 2.1 times the mass of the Sun. The star is radiating 23.4 times theluminosity of the Sun from itsphotosphere at aneffective temperature of 9,245 K,[3] giving it the white hue of anA-type star.[11] Omega2 Aquilae is 224 million years old and is spinning rapidly with aprojected rotational velocity of 152 km/s.[8]
