| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 19h37m 47.31770s[1] |
| Declination | −04° 38′ 51.5072″[1] |
| Apparent magnitude (V) | 5.45[2] |
| Characteristics | |
| Spectral type | F3 IV/V[3] |
| B−V color index | 0.429±0.003[2] |
| Astrometry | |
| Radial velocity (Rv) | −37.6±1.8[4] km/s |
| Proper motion (μ) | RA: +105.381[1] mas/yr Dec.: –53.557[1] mas/yr |
| Parallax (π) | 31.1671 ± 0.1422 mas[1] |
| Distance | 104.6 ± 0.5 ly (32.1 ± 0.1 pc) |
| Absolute magnitude (MV) | 2.98[5] |
| Details | |
| Mass | 1.26[6] M☉ |
| Luminosity | 5.76[2] L☉ |
| Surface gravity (log g) | 4.00[6] cgs |
| Temperature | 6,749±80[4] K |
| Metallicity [Fe/H] | 0.17[4] dex |
| Rotational velocity (v sin i) | 87.0±4.4[5] km/s |
| Age | 1.283[6] Gyr |
| Other designations | |
42 Aql, BD−04° 4861, HD 185124, HIP 96556, HR 7460, SAO 143621[7] | |
| Database references | |
| SIMBAD | data |
42 Aquilae, abbreviated 42 Aql, is a single[8] star in the equatorial constellationofAquila. 42 Aquilae is its Flamsteed designation. It is a dim star but visible to the naked eye under suitable viewing conditions, having an apparent visual magnitude of 5.45.[2] 42 Aql is located some 104.6 light years away, as determined from its annual parallax shiftof31.2 mas.[1] it is moving closer to the Earth with a heliocentric radial velocity of −38 km/s,[4] and is predicted to come to within 52 light-years of the Sun in around 752,000 years.[2]
The stellar classification of this star is F3 IV/V,[3] which matches an F-type star with blended spectral traits of a main sequence star and a subgiant star. It is around 1.3[6] billion years old with a relatively high rate of rotation, having a projected rotational velocity of 87 km/s.[5] The star has 1.26[6] times the mass of the Sun and is radiating 5.76[2] times the Sun's luminosity from its photosphere at an effective temperature of 6,749 K.[4] These coordinates are a source of X-ray emission, which is most likely (99.3% chance) coming from the star.[9]
|
| |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| |||||||||||||
| Stars |
| ||||||||||||
| |||||||||||||
| |||||||||||||
| Nebulae |
| ||||||||||||
| Galaxies |
| ||||||||||||
