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] |
Distance | 89 ± 2
ly (27.2 ± 0.5 pc) |
Absolute magnitude (MV) | 3.27 [7] |
Details | |
Surface gravity (log g) | 4.29 [7] cgs |
Temperature | 6,577 [7] K |
Metallicity [Fe/H] | +0.02 [7] dex |
Rotational velocity (v sin i) | 45.4 [8] km/s |
Age | 1.9 [6] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
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]
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] |
Distance | 89 ± 2
ly (27.2 ± 0.5 pc) |
Absolute magnitude (MV) | 3.27 [7] |
Details | |
Surface gravity (log g) | 4.29 [7] cgs |
Temperature | 6,577 [7] K |
Metallicity [Fe/H] | +0.02 [7] dex |
Rotational velocity (v sin i) | 45.4 [8] km/s |
Age | 1.9 [6] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
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]