HD 191829

HD 191829
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Telescopium
Right ascension 20h 14m 19.0252s[1]
Declination −52° 26′ 44.7553″[1]
Apparent magnitude (V) 5.632±0.009[2]
Characteristics
Spectral type K4 III[3]
B−V color index +1.5[4]
Astrometry
Radial velocity (Rv)14±3[5] km/s
Proper motion (μ) RA: +25.493[1] mas/yr
Dec.: −54.246[1] mas/yr
Parallax (π)4.5849 ± 0.1152 mas[1]
Distance710 ± 20 ly
(218 ± 5 pc)
Absolute magnitude (MV)−0.95[6]
Details
Mass1.17[7] M☉
Radius46.44[8] R☉
Luminosity561[9] L☉
Surface gravity (log g)1.13[7] cgs
Temperature3,800[7] K
Metallicity [Fe/H]+0.13[7] dex
Rotational velocity (v sin i)2.2±1.2[10] km/s
Other designations
81 G. Telescopii, CPD−52°11643, GC 28063, HD 191829, HIP 99747, HR 7714, SAO 246495
Database references
SIMBADdata

HD 191829 (HR 7714) is a solitary[11] star located in the southern constellation Telescopium. It has an apparent magnitude of 5.632, making it faintly visible to the naked eye if viewed under ideal conditions. The star is situated at a distance of 710 light years but is receding with a heliocentric radial velocity of 14 km/s.

HD 191829 has a stellar classification of K4 III, indicating that the object is an ageing K-type giant.[3] It has an angular diameter of 1.98±0.16,[12] yielding a diameter 47 times that of the Sun at its estimated distance.[8] At present it has 117% the mass of the Sun[7] and shines at 561 L☉[9] from its enlarged photosphere at an effective temperature of 3,800 K,[7] giving it an orange glow. HD 191829 has a metallicity 135% that of the Sun[7] and spins modestly with a projected rotational velocity of 2.4 km/s.[10]

  1. ^ a b c d e Cite error: The named reference EDR3 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 Houk1978 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Corben1966 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b c d e f g Cite error: The named reference Anders2019 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference ticv8 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference dr2 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference DeMederios2014 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Bourges2014 was invoked but never defined (see the help page).