14 Sagittae

14 Sagittae is a binary star^[7] system in the equatorial constellation of Aquila.^[10] 14 Sagittae is the Flamsteed designation. It appears as a sixth magnitude star, near the lower limit of visibility to the naked eye, having an apparent visual magnitude of 5.89.^[3] The system is located 660 light years away, as determined from its annual parallax shift of 4.91 mas.^[2] It is moving closer to the Earth with a heliocentric radial velocity of –22 km/s.^[5]

14 Sagittae

Observation data Epoch J2000      Equinox J2000
Constellation	Aquila[1]
Right ascension	20h 03m 30.01519s[2]
Declination	+16° 01′ 52.5065″[2]
Apparent magnitude (V)	5.89[3]
Characteristics
Spectral type	B9p HgMn[4]
U−B color index	−0.44[3]
B−V color index	−0.06[3]
Astrometry
Radial velocity (Rv)	−21.7[5] km/s
Proper motion (μ)	RA: +5.28[6] mas/yr Dec.: −8.99[6] mas/yr
Parallax (π)	4.9142±0.0849 mas[2]
Distance	660 ± 10 ly (203 ± 4 pc)
Absolute magnitude (MV)	−0.72[1]
Orbit[7]
Period (P)	61.541 d
Eccentricity (e)	0.49
Periastron epoch (T)	2440799.01 JD
Argument of periastron (ω) (secondary)	345°
Semi-amplitude (K1) (primary)	4.2 km/s
Details
14 Sge A
Luminosity	291.53[1] L☉
Surface gravity (log g)	3.60[4] cgs
Temperature	13,200[4] K
Rotational velocity (v sin i)	7.0±0.5[8] km/s
Other designations
14 Sge, BD+15°4033, GC 27812, HD 190229, HIP 98754, HR 7664, SAO 105615[9]
Database references
SIMBAD	data

This is a single-lined spectroscopic binary with an orbital period of 61.5 days and an eccentricity of 0.49.^[7] The visible component is a chemically peculiar mercury-manganese star^[11] with a stellar classification of B9p HgMn.^[4] It is narrow-lined with a projected rotational velocity of 7 km/s.^[8] The star is radiating 292^[1] times the Sun's luminosity from its photosphere at an effective temperature of 13,200 K.^[4]