HD 168592

HD 168592
Location of HD 168592 (circled)
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]
Distance490 ± 10 ly
(149 ± 4 pc)
Absolute magnitude (MV)−0.76[6]
Details
Mass1.18[7] M☉
Radius43.6±2.2[8] R☉
Luminosity666+44
−40[1] L☉
Surface gravity (log g)1.34[7] cgs
Temperature4,148±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
7 G. Coronae Australis[12], CD−38°12729, CPD−38°7475, GC 25051, HD 168592, HIP 90037, HR 6862, SAO 210048[13]
Database references
SIMBADdata

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]

  1. ^ a b c d e f g Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference Tycho2000 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Houk1982 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Corben1968 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Anders2019 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Kervella2004 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference Poggio2022 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference DeMed2014 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Gould1879 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Gontcharov2017 was invoked but never defined (see the help page).