Nu Aquilae
 Location of ν Aquarii (circled) |
|
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Aquila |
| Right ascension | 19h 26m 31.09000s[1] |
| Declination | +00° 20′ 18.8521″[1] |
| Apparent magnitude (V) | 4.646[2] |
| Characteristics | |
| Spectral type | F3 Ib[3] |
| U−B color index | +0.592[2] |
| B−V color index | +0.593[2] |
| R−I color index | 0.46 |
| Astrometry | |
| Radial velocity (Rv) | –1.0[4] km/s |
| Proper motion (μ) | RA: +0.57[1] mas/yr Dec.: –2.31[1] mas/yr |
| Parallax (π) | 1.15 ± 0.27[1] mas |
| Distance | approx. 2,800 ly (approx. 900 pc) |
| Absolute magnitude (MV) | –5.0[3] |
| Details | |
| Mass | 10.6[3] M☉ |
| Radius | 78[3] R☉ |
| Luminosity | 11,800[3] L☉ |
| Temperature | 6,900[3] K |
| Metallicity | 7.47[3] |
| Rotational velocity (v sin i) | 13[5] km/s |
| Age | 15[3] Myr |
| Other designations | |
Nu Aquilae (ν Aql, ν Aquilae) is the Bayer designation for a solitary[7] star in the constellation of Aquila and lies close to the celestial equator. It has an apparent visual magnitude of 4.646[2] and so is visible to the naked eye. Based upon an annual parallax shift of only 1.15 mas (with a 23% margin of error),[1] it is approximately 2,800 light-years (860 parsecs) from Earth.
The spectrum of this star matches a stellar classification of F3 Ib,[3] with the luminosity class of Ib indicating this is a supergiant. It has over twelve times the mass of the Sun and 78 times the Sun's radius. The outer atmosphere has an effective temperature of 6,900 K and it is radiating 11,800 times as much light as the Sun.[3] At this heat, it has the yellow-white hue of an F-type star.[8]
References
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