Xi Gruis

Xi Gruis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Grus
Right ascension 21h 32m 05.87583s[1]
Declination −41° 10′ 45.5242″[1]
Apparent magnitude (V) 5.29[2]
Characteristics
Spectral type K0 III[3]
B−V color index +1.10[2]
Astrometry
Radial velocity (Rv)−9.81±0.13[1] km/s
Proper motion (μ) RA: +19.427[1] mas/yr
Dec.: +11.278[1] mas/yr
Parallax (π)7.5904 ± 0.1226 mas[1]
Distance430 ± 7 ly
(132 ± 2 pc)
Absolute magnitude (MV)−0.47[4]
Details
Radius19.2±0.6[1] R☉
Luminosity161.7±3.1[1] L☉
Temperature4,703+76
−74[1] K
Other designations
ξ Gru, CD−41° 14550, FK5 3719, HD 204783, HIP 106327, HR 8229, SAO 230726[5]
Database references
SIMBADdata

ξ Gruis, Latinised as Xi Gruis, is a solitary[6] star in the southern constellation of Grus, near the constellation border with Microscopium. It is visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of 5.3.[2] The star is located about 430 light-years distant from the Sun, based on parallax, but is drifting closer with a radial velocity of −10 km/s.[1]

This is an evolved giant star with a stellar classification of K0 III,[3] having exhausted the supply of hydrogen at its core then cooled and expanded. It now has 19 times the girth of the Sun and is radiating 12 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,703 K.[1]

  1. ^ a b c d e f g h i j k Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Houk1978 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).