HD 158614

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HD 158614
Observation data
J2000.0
Constellation
Ophiuchus
Right ascension 17h 30m 23.79699s[1]
Declination −01° 03′ 46.4882″[1]
Apparent magnitude (V) +5.31[2] (6.02 + 5.93)[3]
Characteristics
Evolutionary stage Subgiant[4]
Spectral type G9IV-V + G9IV-V[3]
B−V color index +0.715±0.013[5]
Distance
53.3 ± 0.6 ly
(16.3 ± 0.2 pc)
Absolute magnitude (MV)4.24[5]
Argument of periastron
(ω)
(secondary)		148.±1.3°
Details
A
Gyr
B
Mass0.951±0.005[6] M☉
HR 6516, SAO 141702, WDS J17304-0104[8]
Database references
SIMBADdata

HD 158614 is a

Zeta Herculis moving group.[10] However, chemical abundances appear to rule that out.[11]

The pair were found to be a

F. G. W. Struve in 1827 and given the catalogue identifier Σ 2173 (now STF 2173). Since then it has completed multiple orbits,[12] yielding orbital elements showing a period of 46.3 years and an eccentricity of 0.17.[3] The two components have similar spectra that match a stellar classification of G9IV-V.[3] They show almost no luminosity variation; one of the pair appears to vary by 0.002 in magnitude.[4] Both components have a slightly lower mass than the Sun: 96% and 95%, respectively.[6] The system is estimated to be 12.3 billion years old.[7]

This binary was included in a search for brown dwarfs that turned up no large companions.[citation needed]

See also

References

  1. ^
    S2CID 18759600
    .
  2. ^
    Bibcode:1990A&AS...85.1015M
    .
  3. ^
    doi:10.1051/aas:2000237
    .
  4. ^
    Bibcode:1998ASPC..140..261L
    .
  5. ^
    S2CID 119257644
    .
  6. ^
    doi:10.1051/0004-6361/201936199
    . A96.
  7. ^
    S2CID 56118016
    .
  8. ^ "HD 158614". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-11-20.
  9. S2CID 59039482
    . A35.
  10. doi:10.1086/116006
    .
  11. doi:10.1017/S174392131000092X
    .
  12. S2CID 123341219
    .
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