Epsilon2 Arae

For other star systems with this Bayer designation, see Epsilon Arae.
Epsilon2 Arae
Diagram showing star positions and boundaries of the Ara constellation and its surroundings
The location of ε2 Arae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Ara
Right ascension 17h 03m 08.70964s[1]
Declination –53° 14′ 13.3020″[1]
Apparent magnitude (V) 5.29[2] (5.44/8.65)[3]
Characteristics
Spectral type F5 V Fe+0.5[4]
U−B color index +0.015[5]
B−V color index +0.48[2]
Astrometry
Radial velocity (Rv)+4.9[6] km/s
Proper motion (μ) RA: +0.15[1] mas/yr
Dec.: −165.20[1] mas/yr
Parallax (π)36.73 ± 0.63 mas[1]
Distance89 ± 2 ly
(27.2 ± 0.5 pc)
Absolute magnitude (MV)3.27[7]
Details
Surface gravity (log g)4.29[7] cgs
Temperature6,577[7] K
Metallicity [Fe/H]+0.02[7] dex
Rotational velocity (v sin i)45.4[8] km/s
Age1.9[6] Gyr
Other designations
CPD−53° 8316, GJ 3985, HD 153580, HIP 83431, HR 6314, SAO 244388.[5]
Database references
SIMBADdata

Epsilon2 Arae (ε2 Arae, ε2 Ara) is the Bayer designation for a double star in the southern constellation of Ara. It is approximately 89 light-years (27 parsecs) distant from Earth. With an apparent visual magnitude of 5.3,[2] it is faintly visible to the naked eye.

The brighter star is a magnitude 5.44 F-type main sequence star with a stellar classification of F5 V Fe+0.5.[4] The Fe+0.5 notation indicates that it has a somewhat higher than normal abundance of iron. It has a magnitude 8.65 companion at an angular separation of 0.590 arcseconds.[3] It has a common proper motion white dwarf companion, WDS J17031-5314, with a magnitude of 13.47.[9]

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