HD 80194

HD 80194
Observation data
Epoch J2000      Equinox J2000
Constellation Chamaeleon
Right ascension 09h 12m 12.3671s[1]
Declination −76° 39′ 46.9007″[1]
Apparent magnitude (V) 6.12±0.01[2]
Characteristics
Evolutionary stage Horizontal branch[3]
Spectral type K1 III[4]
U−B color index +0.99[5]
B−V color index +1.09[5]
Astrometry
Radial velocity (Rv)0.9±0.4[6] km/s
Proper motion (μ) RA: +39.844 mas/yr[1]
Dec.: −43.834 mas/yr[1]
Parallax (π)9.2743 ± 0.02 mas[1]
Distance351.7 ± 0.8 ly
(107.8 ± 0.2 pc)
Absolute magnitude (MV)+0.75[7]
Details
Mass1.15[8] M☉
Radius9.82[9] R☉
Luminosity47±2[10] L☉
Surface gravity (log g)2.43[8] cgs
Temperature4,798±122[11] K
Metallicity [Fe/H]−0.09[12] dex
Rotational velocity (v sin i)<1[13] km/s
Other designations
12 G. Chamaeleontis, CD−76°416, CPD−76°574, FK5 2735, GC 12766, HD 80194, HIP 45166, HR 3695, SAO 256594[14][15]
Database references
SIMBADdata

HD 80194 (HR 3695) is a solitary star in the southern circumpolar constellation Chamaeleon. It has an apparent magnitude of 6.12,[2] allowing it to be faintly seen with the naked eye. Parallax measurements place the object at a distance of 351 light years[1] and is currently receding with a poorly constrained radial velocity of 0.9 km/s.[6]

HD 80194 has a stellar classification of K1 III,[4] indicating that it is a red giant that has exhausted its core hydrogen. It is thought to be a red clump star, on the cool end of the horizontal branch and fusing helium in its core.[3] It has 115% the mass of the Sun[8] but has expanded to 9.82 times its girth.[9] It shines at 47 times the luminosity of the Sun[10] from its photosphere at an effective temperature of 4,798 K,[11] giving it an orange glow. HD 80194 has an iron abundance 81% that of the Sun[12] and spins slowly with a projected rotational velocity lower than 1 km/s.[13]

  1. ^ a b c d e Cite error: The named reference EDR3 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Tycho2000 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Laney2011 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Houk1975 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference Anders2019 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Kervella2021 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference Charbonnel2020 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  12. ^ a b Cite error: The named reference Eggen1993 was invoked but never defined (see the help page).
  13. ^ a b Cite error: The named reference DeMederios2014 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Gould1879 was invoked but never defined (see the help page).