HD 169405

HD 169405
Observation data
Epoch J2000      Equinox J2000
Constellation Telescopium
Right ascension 18h 26m 54.01379s[1]
Declination −48° 07′ 02.0638″[1]
Apparent magnitude (V) +5.44[2]
Characteristics
Spectral type K0.5III + F/G[3]
B−V color index 0.855±0.004[2]
Astrometry
Radial velocity (Rv)+2.11±3.42[1] km/s
Proper motion (μ) RA: +3.041±0.182[1] mas/yr
Dec.: −54.895±0.169[1] mas/yr
Parallax (π)12.2045 ± 0.2664 mas[1]
Distance267 ± 6 ly
(82 ± 2 pc)
Absolute magnitude (MV)1.14[4]
Details
Mass2.4[4] M☉
Radius9.8[1] R☉
Luminosity35[4] L☉
Surface gravity (log g)2.94[4] cgs
Temperature5,062[4] K
Metallicity [Fe/H]+0.04[4] dex
Rotational velocity (v sin i)2.7±1.7[5] km/s
Age557[1] Myr
Other designations
CD−48°12505, GC 25150, HD 169405, HIP 90414, HR 6894, SAO 229021[6]
Database references
SIMBADdata

HD 169405 (HR 6894), is a suspected binary star[7] system in the southern constellation Telescopium, about a degree to the north of Zeta Telescopii.[8] It has an apparent magnitude of 5.44,[2] making it faintly visible to the naked eye under ideal conditions. HD 169405 is located at a distance of 267 light years[1] and is drifting away with a heliocentric radial velocity of 3.8 km/s.[2]

The visible component has a spectral classification K0.5III[3] which indicates that it is an evolved star between a K0 and K1 giant. It has expanded to ten times the Sun's radius, shines at 35 solar luminosities, and has an effective temperature of 5,062 K.[4] This temperature gives it the yellowish-orange glow of a K-type star, and it spins slowly with a projected rotational velocity of 2.7 km/s.[5]

  1. ^ a b c d e f g h i Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Anderson2012 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. ^ a b c d e f g Cite error: The named reference cascades was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference deMedeiros2014 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Sinnott1997 was invoked but never defined (see the help page).