Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Ara |
Right ascension | 17h 26m 00.04169s [1] |
Declination | –50° 38′ 00.6417″ [1] |
Apparent magnitude (V) | 5.21 [2] |
Characteristics | |
Spectral type | G8 III [3] |
B−V color index | +1.05 [2] |
Astrometry | |
Radial velocity (Rv) | +17.3 [4] km/s |
Proper motion (μ) |
RA: +13.45
[1]
mas/
yr Dec.: +8.36 [1] mas/ yr |
Parallax (π) | 7.16 ± 0.40 mas [1] |
Distance | 460 ± 30
ly (140 ± 8 pc) |
Absolute magnitude (MV) | –0.58 [5] |
Details | |
Radius | 14 [6] R☉ |
Surface gravity (log g) | 2.3 [5] cgs |
Temperature | 4,950 [5] K |
Metallicity [Fe/H] | –0.3 [5] dex |
Other designations | |
Database references | |
SIMBAD | data |
Kappa Arae (κ Ara, κ Arae) is the Bayer designation for a single [8] star in the southern constellation of Ara. Based upon parallax measurements, it is approximately 460 light-years (140 parsecs) distant from Earth, give or take a 30 light-year margin of error. [1] With an apparent visual magnitude of 5.21, [2] this star is faintly visible to the naked eye.
This is a giant star with a stellar classification of G8 III; [3] its outer envelope has expanded to about 14 times the radius of the Sun. [6] It is radiating energy into space at an effective temperature of 4,950 K. [5] This is hot enough for it to shine with the golden-hued glow of a G-type star. [9]
It has two 14th magnitude optical companions that are at an angular distance of 25 and 30 arcseconds.[ citation needed]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Ara |
Right ascension | 17h 26m 00.04169s [1] |
Declination | –50° 38′ 00.6417″ [1] |
Apparent magnitude (V) | 5.21 [2] |
Characteristics | |
Spectral type | G8 III [3] |
B−V color index | +1.05 [2] |
Astrometry | |
Radial velocity (Rv) | +17.3 [4] km/s |
Proper motion (μ) |
RA: +13.45
[1]
mas/
yr Dec.: +8.36 [1] mas/ yr |
Parallax (π) | 7.16 ± 0.40 mas [1] |
Distance | 460 ± 30
ly (140 ± 8 pc) |
Absolute magnitude (MV) | –0.58 [5] |
Details | |
Radius | 14 [6] R☉ |
Surface gravity (log g) | 2.3 [5] cgs |
Temperature | 4,950 [5] K |
Metallicity [Fe/H] | –0.3 [5] dex |
Other designations | |
Database references | |
SIMBAD | data |
Kappa Arae (κ Ara, κ Arae) is the Bayer designation for a single [8] star in the southern constellation of Ara. Based upon parallax measurements, it is approximately 460 light-years (140 parsecs) distant from Earth, give or take a 30 light-year margin of error. [1] With an apparent visual magnitude of 5.21, [2] this star is faintly visible to the naked eye.
This is a giant star with a stellar classification of G8 III; [3] its outer envelope has expanded to about 14 times the radius of the Sun. [6] It is radiating energy into space at an effective temperature of 4,950 K. [5] This is hot enough for it to shine with the golden-hued glow of a G-type star. [9]
It has two 14th magnitude optical companions that are at an angular distance of 25 and 30 arcseconds.[ citation needed]