31 Aquilae

This article is about b Aquilae. Not to be confused with β Aquilae.
31 Aquilae
Diagram showing star positions and boundaries of the Aquila constellation and its surroundings
Location of 31 Aquarii (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Aquila
Right ascension 19h 24m 58.20027s[1]
Declination +11° 56′ 39.8862″[1]
Apparent magnitude (V) 5.16[2]
Characteristics
Spectral type G8 IV[2]
U−B color index +0.42[3]
B−V color index +0.77[2]
Astrometry
Radial velocity (Rv)–100.5[4] km/s
Proper motion (μ) RA: +721.02[1] mas/yr
Dec.: +642.49[1] mas/yr
Parallax (π)65.89 ± 0.26 mas[1]
Distance49.5 ± 0.2 ly
(15.18 ± 0.06 pc)
Absolute bolometric
magnitude (Mbol)		4.01[5]
Details
Mass1.16 ± 0.07[5] M☉
Radius1.379 ± 0.042[6] R☉
Luminosity1.904 ± 0.045[6] L☉
Surface gravity (log g)4.18 ± 0.03[5] cgs
Temperature5,510 ± 90[2] K
Metallicity [Fe/H]+0.37[7] dex
Age4.5 ± 0.2[5] Gyr
Other designations
BD+11 3833, FK5 1503, HD 182572, GJ 759, NLTT 47763, HIP 95447, HR 7373, LFT 1477, LHS 3463, LTT 15668, NSV 11994, SAO 104807.[8]
Database references
SIMBADdata

31 Aquilae (abbreviated 31 Aql) is a star in the equatorial constellation of Aquila. 31 Aquilae is its Flamsteed designation though it also bears the Bayer designation b Aquilae. This star has an apparent visual magnitude of 5.16 and is 49.5 light years from Earth. It has no known companions.

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