HD 156091

HD 156091
Observation data
Epoch J2000      Equinox J2000
Constellation Ara
Right ascension 17h 19m 12.50730s[1]
Declination −59° 41′ 40.5989″[1]
Apparent magnitude (V) 5.91[2] (5.91 + 13.00)[3]
Characteristics
Spectral type K2 IIICNIB/II[4]
B−V color index 1.37[2]
Astrometry
Radial velocity (Rv)−5.0±0.4[5] km/s
Proper motion (μ) RA: −3.15[1] mas/yr
Dec.: −8.05[1] mas/yr
Parallax (π)1.31 ± 0.36 mas[1]
Distanceapprox. 2,500 ly
(approx. 800 pc)
Details
Mass8.4±1.0[6] M☉
Luminosity4,266[7] L☉
Temperature4,306[7] K
Age33.7±8.6[6] Myr
Other designations
CD-59° 6506, HD 156091, HIP 84731, HR 6408, SAO 244613.
Database references
SIMBADdata

HD 156091 is a double star in the southern constellation of Ara. The primary is a sixth magnitude giant star with stronger than normal lines of carbon, nitrogen, and barium in its spectrum.[8] The companion is a 13th magnitude star at an angular separation of 27.4″ along a position angle of 275°, as of 2000.[3]

  1. ^ a b c d e Cite error: The named reference van Leeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference mnrassa27_11 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference WDSC2014 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference houk1979 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Gontcharov was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference mnras410_1_190 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Mcdonald_et_al_2012 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference pasp99_629 was invoked but never defined (see the help page).