HD 119124

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HD 119124
Observation data
Epoch J2000      Equinox J2000
Constellation Ursa Major[1]
A
Right ascension 13h 40m 23.2321s[2]
Declination +50° 31′ 09.894″[2]
Apparent magnitude (V) 6.32[3]
B
Right ascension 13h 40m 24.5187s[4]
Declination +50° 30′ 57.569″[4]
Apparent magnitude (V) 10.51[5]
Characteristics
Spectral type F8 V[6] + K7[7]
U−B color index −0.01[3]
B−V color index +0.52[3]
Distance
83.05 ± 0.03 ly
(25.46 ± 0.01 pc)
Absolute magnitude (MV)8.59[10]
Details
A
dex
TYC 3469-1423-1, 2MASS J13402450+5030576[20]
Database references
SIMBADdata
B

HD 119124 is a wide

light years. The pair are candidate members of the Castor Moving Group,[22] which implies a relatively youthful age of around 200 million years.[15] HD 119124 is moving closer to the Sun with a radial velocity of −12 km/s.[8]

This system was first identified as a

gravitationally bound with an estimated orbital period of around 7,000 years and a linear projected separation of 444.6 AU.[21]

The primary, component A, is a

Sun's luminosity from its photosphere at an effective temperature of 6,149 K.[13]

HD 119124 A displays a strong

circumstellar disk of cold dust. The emission fits a model with a grain temperature of 40 K, indicating a minimum orbital radius of 60 AU from the host star. The estimated grain lifetimes are 84,000 years – much shorter than the star's lifespan. This suggests the grains are being replenished via collisions between some number of larger bodies totalling around 1−6 times the mass of the Moon.[12]

This system is a likely (80.4% chance) source of the strong X-ray emission coming from these coordinates.[24]

References

  1. doi:10.1134/S1063773712050015
    .
  2. ^
    S2CID 244398875
    . Gaia DR3 record for this source at VizieR.
  3. ^
    Bibcode:1991A&AS...89..415O
    .
  4. ^
    S2CID 244398875
    . Gaia DR3 record for this source at VizieR.
  5. ^
    doi:10.1086/323920
    .
  6. ^
    S2CID 119476992
    .
  7. doi:10.1086/113994
    .
  8. ^
    S2CID 119231169
    .
  9. S2CID 118577511
    .
  10. doi:10.1086/117655
    .
  11. ^
    doi:10.1093/mnras/stv2825
    .
  12. ^
    doi:10.1086/497124
    .
  13. ^
    S2CID 56420519
    , L8.
  14. doi:10.3847/1538-3881/ad2c86
    .
  15. ^
    S2CID 118446756
    , 5.
  16. S2CID 16238033
    .
  17. doi:10.1051/0004-6361/202245762
    .
  18. ^ "WDS J13404+5031AB". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-10-14.
  19. ^ "HD 119124". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-10-14.
  20. ^ "HD 119124B". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-10-14.
  21. ^
    S2CID 56066740
    , 87.
  22. S2CID 118875432
    .
  23. Bibcode:2000IBVS.5003....1A
    .
  24. S2CID 119267456
    .
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