| |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 18h51m 05.40849s[2] |
| Declination | −03° 15′ 40.0050″[2] |
| Apparent magnitude (V) | 6.894[3] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | F0V[3] or F0IV[4] |
| B−V color index | +0.285[1] |
| Variable type | δ Sct[1] |
| Astrometry | |
| Radial velocity (Rv) | −20.65[2] km/s |
| Proper motion (μ) | RA: −46.266[2] mas/yr Dec.: −59.024[2] mas/yr |
| Parallax (π) | 9.0793 ± 0.0286 mas[2] |
| Distance | 359 ± 1 ly (110.1 ± 0.3 pc) |
| Absolute magnitude (MV) | 1.22[3] |
| Details | |
| Mass | 2.05[3][1] M☉ |
| Radius | 2.73[5] R☉ |
| Luminosity | 24[1] L☉ |
| Surface gravity (log g) | 3.62[3] cgs |
| Temperature | 7,257[3] K |
| Metallicity [Fe/H] | 0.01[3] dex |
| Rotational velocity (v sin i) | 32[1] km/s |
| Age | 1.17[2] Gyr |
| Other designations | |
7 Aql, V1728 Aql, BD–03°4390, HD 174532, HIP 92501, SAO 142696[6] | |
| Database references | |
| SIMBAD | data |
7 Aquilae is a star in the equatorial constellationofAquila,[6] located 359 light years away from the Sun. 7 Aquilae is the Flamsteed designation. It is visible to the naked eye as a faint, yellow-white hued star with a baseline apparent visual magnitude of 6.9. The star is moving closer to the Earth with a heliocentric radial velocityof−21 km/s.
Houk and Swift (1999) find a stellar classification of F0IV,[4] matching an F-type subgiant star that has exhausted the hydrogen at its core and is evolving into a giant. Fox Machado et al. (2010) found a class of F0V, suggesting it is still a main sequence star.[3] This is a pulsating variable star of the Delta Scuti type.[3] It has double[3] the mass of the Sun and 2.7[5] times the Sun's radius. The detection of an infrared excess suggests a debris disk with a mean temperature of 140 K is orbiting about 16.30 AU away from the host star.[5]
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