Mu Horologii

Mu Horologii (μ Horologii) is a solitary,^[9] yellow-white hued star in the southern constellation of Horologium. It is faintly visible to the naked eye with an apparent visual magnitude of 5.11.^[2] Based upon an annual parallax shift of 23.04 mas as seen from Earth,^[1] it is located about 141.6 light years from the Sun.

Mu Horologii

Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Horologium
Right ascension	03h 03m 36.81891s[1]
Declination	−59° 44′ 15.9925″[1]
Apparent magnitude (V)	5.11[2]
Characteristics
Spectral type	F0 III/IV[3]
B−V color index	+0.34[2]
Astrometry
Radial velocity (Rv)	17.3±2.8[4] km/s
Proper motion (μ)	RA: −73.29[1] mas/yr Dec.: −64.06[1] mas/yr
Parallax (π)	23.04±0.16 mas[1]
Distance	141.6 ± 1.0 ly (43.4 ± 0.3 pc)
Absolute magnitude (MV)	1.99[5]
Details
Mass	1.53+0.08 −0.01[6] M☉
Luminosity	13[7] L☉
Surface gravity (log g)	3.80±0.02[6] cgs
Temperature	6,898±63[6] K
Metallicity [Fe/H]	−0.42±0.05[6] dex
Rotational velocity (v sin i)	79.2±4.0[5] km/s
Age	1.95+0.20 −0.14[6] Gyr
Other designations
μ Hor, CPD−60°236, HD 19319, HIP 14240, HR 934, SAO 232981[8]
Database references
SIMBAD	data

This is an evolving F-type star with a stellar classification of F0 III/IV,^[3] showing mixed traits of a subgiant and a giant star. It is around two billion years old with a projected rotational velocity of 79.2 km/s.^[5] The star has 1.5^[6] times the mass of the Sun and is radiating 13^[7] times the solar luminosity from its photosphere at an effective temperature of 6,898 K.^[6]