69 Virginis

69 Virginis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Virgo
Right ascension 13h 27m 27.16348s[1]
Declination −15° 58′ 24.8980″[1]
Apparent magnitude (V) 4.76[2]
Characteristics
Evolutionary stage horizontal branch
Spectral type K0 III-IIIb CN1.5 CH0.5[3]
U−B color index +1.06[4]
B−V color index +1.09[4]
Astrometry
Radial velocity (Rv)−12.9±0.5[5] km/s
Proper motion (μ) RA: −121.016[1] mas/yr
Dec.: +21.197[1] mas/yr
Parallax (π)12.5871 ± 0.2367 mas[1]
Distance259 ± 5 ly
(79 ± 1 pc)
Absolute magnitude (MV)0.09[2]
Details[6]
Mass3.51±0.94 M☉
Radius15[7] R☉
Luminosity87.1[7] L☉
Surface gravity (log g)2.70±0.11 cgs
Temperature4,909±92 K
Metallicity [Fe/H]0.11[8] dex
Rotational velocity (v sin i)4.3[7] km/s
Age288+343
−156 Myr
Other designations
16 Vir, NSV 6253, BD+04°2604, GJ 9444, HD 116976, HIP 65639, HR 5068, SAO 157946[9]
Database references
SIMBADdata

69 Virginis is a single[10] star in the zodiac constellation of Virgo, located about 259 light years away. It is visible to the naked eye as a faint orange-hued star with an apparent visual magnitude of 4.76,[2] although it is a suspected variable that may range in magnitude from 4.75 down to 4.79.[11] This object is moving closer to the Earth with a heliocentric radial velocity of −13 km/s.[5] The light from this star is polarized due to intervening interstellar dust.[12]

This is an evolved K-type giant star with a stellar classification of K0 III-IIIb CN1.5 CH0.5,[3] showing overabundances of CN and CH molecules in the spectrum. It is a red clump giant, which indicates is on the horizontal branch generating energy via helium fusion at its core.[13] The star is about 288 million years old with 3.5[6] times the mass of the Sun and 15[7] times the Sun's radius. It is radiating 87[7] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,909 K.[6]

  1. ^ a b c d e Cite error: The named reference gaia_dr2 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference perkins1989 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference hr was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference feuillet2016 was invoked but never defined (see the help page).
  7. ^ a b c d e Cite error: The named reference Massarotti2008 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Melendez2008 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Samus2017 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Leroy1993 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Alves2000 was invoked but never defined (see the help page).