7 Aquilae is a star in the equatorial constellation of Aquila,[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 velocity of −21 km/s.

7 Aquilae

A blue band light curve for 7 Aquilae, adapted from Machado et al. (2007)[1]
Observation data Epoch J2000      Equinox J2000
Constellation	Aquila
Right ascension	18h 51m 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

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]

References