Epsilon Sextantis
Star in the constellation Sextans / From Wikipedia, the free encyclopedia
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]
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 | |
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]