Observation data Epoch J2000 Equinox J2000 |
|
---|---|
Constellation | Taurus |
Right ascension | 05h 24m 25.46380s[1] |
Declination | +17° 23′ 00.7166″[1] |
Apparent magnitude (V) | 5.1149[1] |
Characteristics | |
Spectral type | F8V[2] |
U−B color index | −0.05[3] |
B−V color index | 0.544[1] |
Variable type | BY Dra[3] |
Astrometry | |
Radial velocity (Rv) | +37.8[4] km/s |
Proper motion (μ) | RA: +251.05[1] mas/yr Dec.: −7.99[1] mas/yr |
Parallax (π) | 69.51 ± 0.38[1] mas |
Distance | 46.9 ± 0.3 ly (14.39 ± 0.08 pc) |
Details | |
Radius | 1.3[5] R☉ |
Surface gravity (log g) | 4.24[6] |
Luminosity | 1.845[7] L☉ |
Temperature | 6,015[6] K |
Metallicity | [Fe/H] = −0.14[6] |
Rotation | 4.1 days[8] |
Rotational velocity (v sin i) | 16.0[9] km/s |
Age | 3.76[10] Gyr |
Other designations | |
111 Tauri is a single star in the constellation Taurus. It is located at a distance of about 47 light years from the Sun. This is a main sequence star with a stellar classification of F8V. It is larger and more luminous than the Sun, with about 130% of the Sun's radius and 185% of the Sun's luminosity. The apparent magnitude of 5.1 indicates it is a faint star that can be viewed by the naked eye under good, dark-sky conditions.
The metallicity of this star, which measures the proportion of elements other than hydrogen and helium, is similar to the Sun. Estimates of [Fe/H], which is the logarithm of the ratio of iron to hydrogen as compared to the Sun, range from a low of −0.14 to a high of 0.05.[6][8] This star shows an unusually high content of Lithium, which remains unexplained.[8] Age estimates for this star range from 3.6 to 3.76 billion years.[4][10] It is a prominent X-ray source.[8]
This star is rotating relatively rapidly, completing a rotation along the equator every 4.1 days as compared to 25 days for the Sun. It is also undergoing differential rotation in which the rotation velocity varies by latitude.[11]
This star was examined for an excess of infrared emission that could indicate it has a circumstellar debris disk of dust, but no significant excess was observed.[10] The space velocity components of this star are [U, V, W] = [−36.94, −14.63, 7.63] km/s.[2] It shares a common proper motion with HD 25220, an active star with stellar classification K4V. Both stars are members of the Hyades stellar kinematic group of co-moving stars.[8]