Epsilon Sextantis

Epsilon Sextantis, Latinized from ε Sextantis, is a solitary,^[10] yellow-white hued star in the equatorial constellation of Sextans. With an apparent visual magnitude of 5.24,^[2] it is faintly visible to the naked eye on a dark night. The distance to this star, based upon an annual parallax shift of 16.86 mas,^[1] is about 193 light years. It is drifting further away from the Sun with a radial velocity of +15 km/s.^[4]

ε Sextantis

Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Sextans
Right ascension	10h 17m 37.80200s[1]
Declination	−08° 04′ 08.0898″[1]
Apparent magnitude (V)	5.24[2]
Characteristics
Spectral type	F0 IV[3]
U−B color index	+0.09[2]
B−V color index	+0.32[2]
Astrometry
Radial velocity (Rv)	+15.2[4] km/s
Proper motion (μ)	RA: −160.57[1] mas/yr Dec.: +2.91[1] mas/yr
Parallax (π)	16.86±0.28 mas[1]
Distance	193 ± 3 ly (59.3 ± 1.0 pc)
Absolute magnitude (MV)	2.42[5]
Details
Mass	1.94[6] M☉
Radius	3.14+0.18 −0.30[7] R☉
Luminosity	23.24±0.55[7] L☉
Surface gravity (log g)	3.83±0.08[8] cgs
Temperature	7,166±88[8] K
Metallicity [Fe/H]	+0.31±0.05[8] dex
Rotational velocity (v sin i)	63.5±3.2[5] km/s
Age	1.1[6] Gyr
Other designations
ε Sex, 22 Sextantis, BD−07°3001, FK5 1263, HD 89254, HIP 50414, HR 4042, SAO 137469[9]
Database references
SIMBAD	data

This is an F-type subgiant star with a stellar classification of F0 IV.^[3] However, Malaroda (1975) gave a classification of F2 III,^[11] which would indicate a more evolved giant star. It is estimated to have nearly double the mass of the Sun^[6] with 3.1^[7] times the Sun's radius. The star is around 1.1 billion years old and has a projected rotational velocity of 63.5 km/s.^[5] It is radiating 23^[7] times the luminosity of the Sun from its photosphere at an effective temperature of 7,166 K.^[8]