Our website is made possible by displaying online advertisements to our visitors.
Please consider supporting us by disabling your ad blocker.

Responsive image

HD 119124

HD 119124
Observation data
Epoch J2000      Equinox J2000
Constellation Ursa Major
A
Right ascension 13h 40m 23.2324s[1]
Declination +50° 31′ 09.8962″[1]
Apparent magnitude (V) 6.32[2]
B
Right ascension 13h 40m 24.5190s[3]
Declination +50° 30′ 57.5709″[3]
Apparent magnitude (V) 10.51[4]
Characteristics
Spectral type F8 V[5] + K7[6]
U−B color index −0.01[2]
B−V color index +0.52[2]
Astrometry
A
Radial velocity (Rv)−12.2±0.3[7] km/s
Proper motion (μ) RA: −125.728±0.047[1] mas/yr
Dec.: 58.567±0.046[1] mas/yr
Parallax (π)39.2353 ± 0.0354 mas[1]
Distance83.13 ± 0.08 ly
(25.49 ± 0.02 pc)
Absolute magnitude (MV)4.30[8]
B
Proper motion (μ) RA: −131.130±0.044[3] mas/yr
Dec.: 59.299±0.049[3] mas/yr
Parallax (π)39.3513 ± 0.0326 mas[3]
Distance82.88 ± 0.07 ly
(25.41 ± 0.02 pc)
Details
A
Mass1.15[9] M☉
Radius1.1[10] R☉
Luminosity1.5[10] L☉
Temperature6,149[11] K
Metallicity [Fe/H]−0.18[11] dex
Rotational velocity (v sin i)10.2[12] km/s
Age2.06±22[12] Gyr
B
Mass0.63[9] M☉
Temperature4,130[13] K
Other designations
STF 1774, HD 119124, ADS 8992, CCDM J13404+5031, WDS J13404+5031[14]
A: BD+51°1859, GJ 521.2, HIP 66704, HR 5148, SAO 28836[15]
B: BD+51°1859 B, HIP 66704 B, HR 5148 B, TYC 3469-1423-1, 2MASS J13402450+5030576[16]
Database references
SIMBADdata

HD 119124 is a wide binary star[17] system in the circumpolar constellation of Ursa Major. With an apparent visual magnitude of 6.3,[2] it lies below the normal brightness limit of stars that are visible with the naked eye under most viewing conditions. An annual parallax shift of 39.24[1] mas for the A component provides a distance estimate of 83 light years. The pair are candidate members of the Castor Moving Group,[18] which implies a relatively youthful age of around 200 million years.[12] HD 119124 is moving closer to the Sun with a radial velocity of −12 km/s.[7]

This system was first identified as a double star by Friedrich von Struve (1793−1864) and catalogued as the 1774th entry in his list. As of 2015, the magnitude 10.5 K-type companion star was located at an angular separation of 18.10 arc seconds along a position angle of 135° from the brighter primary.[4] They appear to be gravitationally bound with an estimated orbital period of around 7,000 years and a linear projected separation of 444.6 AU.[17]

The primary, component A, is a Sun-like star[10] with a stellar classification of F8 V,[5] indicating it is an F-type main-sequence star that is generating energy via hydrogen fusion at its core. It is slightly larger and more massive than the Sun[10][9] and appears mildly variable.[19] The star is radiating 1.5[10] times the Sun's luminosity from its photosphere at an effective temperature of 6,149 K.[11]

HD 119124 A displays a strong infrared excess at a wavelength of 70 μm, indicating an orbiting 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 totaling around 1−6 times the mass of the Moon.[10]

This system is a likely (80.4% chance) source of the strong X-ray emission coming from these coordinates.[20]

  1. ^ a b c d e f Cite error: The named reference Gaia DR2 for A was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Oja1991 was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference Gaia DR2 for B was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference WDSC2014 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Gray2006 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Stephenson1986 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Holmberg2009 was invoked but never defined (see the help page).
  9. ^ a b c Cite error: The named reference Tokovinin2015 was invoked but never defined (see the help page).
  10. ^ a b c d e f Cite error: The named reference Chen2005 was invoked but never defined (see the help page).
  11. ^ a b c Cite error: The named reference Pace2013 was invoked but never defined (see the help page).
  12. ^ a b c Cite error: The named reference Zuckerman2013 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Morales2008 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference simbad was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference simbad for A was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference simbad for B was invoked but never defined (see the help page).
  17. ^ a b Cite error: The named reference Tokovinin2014 was invoked but never defined (see the help page).
  18. ^ Cite error: The named reference Caballero2010 was invoked but never defined (see the help page).
  19. ^ Cite error: The named reference Adelman2000 was invoked but never defined (see the help page).
  20. ^ Cite error: The named reference Haakonsen2009 was invoked but never defined (see the help page).

Previous Page Next Page






HD 119124 Swedish HD 119124 Chinese

Responsive image

Responsive image