Nu Horologii

ν Horologii
Location of ν Fornacis (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Horologium
Right ascension 02h 49m 01.487s[1]
Declination −62° 48′ 23.48″[1]
Apparent magnitude (V) 5.253±0.006[2]
Characteristics
Spectral type A2 V[3]
U−B color index +0.06[4]
B−V color index +0.10[4]
Astrometry
Radial velocity (Rv)30.90[5] km/s
Proper motion (μ) RA: 94.372 mas/yr[1]
Dec.: 28.564 mas/yr[1]
Parallax (π)19.2611 ± 0.0635 mas[1]
Distance169.3 ± 0.6 ly
(51.9 ± 0.2 pc)
Absolute magnitude (MV)+1.74[6]
Details
Mass1.90±0.02[7] M☉
Radius1.88[8] R☉
Luminosity16.7[7] L☉
Surface gravity (log g)3.96[3] cgs
Temperature8,308[3] K
Metallicity [Fe/H]−0.05[3] dex
Rotational velocity (v sin i)143.7±1.4[9] km/s
Age540±90[7] Myr
Other designations
ν Hor, CPD−63° 188, FK5 2196, HD 17848, HIP 13141, HR 852, SAO 248656[10]
Database references
SIMBADdata

Nu Horologii, Latinized from ν Horologii, is the Bayer designation for a single[11] star in the southern constellation of Horologium. It was catalogued by the Dutch explorer Frederick de Houtman in 1603.[12] With an apparent visual magnitude of 5.3,[2] this star can be seen with the naked eye from the southern hemisphere. (According to the Bortle scale, it can be seen at night from bright suburban skies.) Based upon parallax, Nu Horologii lies at a distance of 169 light-years from Earth.[1] It is drifting closer to the Sun with a radial velocity of +31 km/s.[5]

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