Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Corona Australis |
Right ascension | 18h 22m 18.57340s[1] |
Declination | −38° 39′ 24.8261″[1] |
Apparent magnitude (V) | 5.07±0.01[2] |
Characteristics | |
Spectral type | K4/5 III[3] |
B−V color index | +1.49[4] |
Astrometry | |
Radial velocity (Rv) | 17.8±2.8[5] km/s |
Proper motion (μ) | RA: −41.570 mas/yr[1] Dec.: −29.379 mas/yr[1] |
Parallax (π) | 6.7176 ± 0.1706 mas[1] |
Distance | 490 ± 10 ly (149 ± 4 pc) |
Absolute magnitude (MV) | −0.76[6] |
Details | |
Mass | 1.18[7] M☉ |
Radius | 43.6±2.2[8] R☉ |
Luminosity | 666+44 −40[1] L☉ |
Surface gravity (log g) | 1.34[7] cgs |
Temperature | 4,148±122[9] K |
Metallicity [Fe/H] | −0.13±0.01[10] dex |
Rotational velocity (v sin i) | 1.9±1.3[11] km/s |
Other designations | |
Database references | |
SIMBAD | data |
HD 168592, also designated as HR 6862 or rarely 7 G. Coronae Australis, is a solitary star[14] located in the southern constellation Corona Australis. It is faintly visible to the naked eye as an orange-hued star with an apparent magnitude of 5.07. Gaia DR3 parallax measurements place it at a distance of 490 light years[1] and is currently receding with a heliocentric radial velocity of 18 km/s.[5] At its current distance, HD 168592's brightness is diminished by 0.38 magnitudes due to interstellar dust.[15] It has an absolute magnitude of −0.76.[6]
HD 168592 has a stellar classification of K4/5 III,[3] indicating that it is an evolved K-type star with the characteristics of a K4 and K5 giant star. It has a comparable mass to the Sun[7] but the star has expanded to 43.6 times the Sun's radius.[8] It radiates 666 times the luminosity of the Sun[1] from its enlarged photosphere at an effective temperature of 4,148 K.[9] HD 168592 is slightly metal deficient with an iron abundance 26% below solar levels.[10] The star spins slowly, as is common for giant stars, with a projected rotational velocity of 1.9 km/s.[11]