HD 128429

HD 128429
Observation data
Epoch J2000      Equinox J2000
Constellation Libra
Right ascension 14h 36m 59.79592s[1]
Declination −12° 18′ 19.0687″[1]
Apparent magnitude (V) 6.197±0.005[2]
Characteristics
Evolutionary stage Blue straggler[3]
Spectral type F6V[4]
B−V color index 0.464±0.011[5]
Astrometry
Radial velocity (Rv)−66.1±0.5[5] km/s
Proper motion (μ) RA: −868.62[1] mas/yr
Dec.: −364.52[1] mas/yr
Parallax (π)37.1800 ± 0.4010 mas[1]
Distance87.7 ± 0.9 ly
(26.9 ± 0.3 pc)
Absolute magnitude (MV)3.66[5]
Orbit[3]
CompanionAb
Period (P)1,086±77 d
Semi-major axis (a)1.589 AU[6]
Eccentricity (e)≤ 0.15
Details[2]
Aa
Mass1.32 M☉
Radius1.39±0.06 R☉
Luminosity2.75[7] L☉
Surface gravity (log g)4.28±0.10 cgs
Temperature6,341±70 K
Metallicity [Fe/H]−0.10±0.06 dex
Rotational velocity (v sin i)16.2±0.5 km/s
Age1.7±0.6[3] Gyr
3.10[7] Gyr
Ab
Mass0.49±0.09 M☉[3]
0.130+0.036
−0.015[6] M☉
Other designations
BD−11°3770, FK5 1381, HD 128429, HIP 71469, HR 5455, SAO 158677, LAL 26630, LHS 2953[8]
Database references
SIMBADdata

HD 128429 is a binary star[3] system located at a distance of 88[1] light years from the Sun in the southern zodiac constellation of Libra. It has a yellow-white hue and is just barely visible to the naked eye with an apparent visual magnitude of 6.20.[5] The system is drifting closer to the Sun with a radial velocity of −66 km/s[5] and has a high proper motion, traversing the celestial sphere at the rate of 0.945″ per year.[9] It is a well-known high velocity star[10] system with a net heliocentric velocity of 158.8 km/s. The system is orbiting the through the galaxy with a high eccentricity of 0.62, which carries it from as close as 4.1 out to 17.5 kpc away from the Galactic Center.[5]

  1. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Fuhrmann_Chini_2019 was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference Fuhrmann_Chini_2017 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Gray_et_al_2006 was invoked but never defined (see the help page).
  5. ^ a b c d e f Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Kervella_et_al_2019 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Earle2017 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Luyten1979 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Heck1978 was invoked but never defined (see the help page).