HD 126129 and HD 126128

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Template:Short description

HD 126129 and HD 126128
Observation data
Epoch J2000      Equinox J2000
Constellation Boötes[1]
HD 126129
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) 5.04[3]
HD 126128
Right ascension Template:RA[4]
Declination Template:DEC[4]
Apparent magnitude (V) 6.74[3] (7.50 + 7.70)‍[5]
Characteristics
HD 126129
Evolutionary stage main sequence[6]
Spectral type A0V[7]
U−B Template:Engvar −0.08[8]
B−V Template:Engvar −0.02[8]
HD 126128
Spectral type F0V + F2V[7]
U−B Template:Engvar −0.01[8]
B−V Template:Engvar +0.43[8]
Astrometry
HD 126129
Radial velocity (Rv)−22.6[9] km/s
Proper motion (μ) RA: −75.188[2] mas/yr
Dec.: −9.265[2] mas/yr
Parallax (π)14.3216±0.1123 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
HD 126128
Radial velocity (Rv)−17.6[9] km/s
Proper motion (μ) RA: −83.783[4] mas/yr
Dec.: −4.601[4] mas/yr
Parallax (π)9.7572±0.7363 mas[10]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Orbit[11]
PrimaryB
CompanionC
Period (P)40.0 yr
Semi-major axis (a)0.24″
Eccentricity (e)0.25
Inclination (i)42°
Details
HD 126129
Mass2.4[2] Template:Solar mass
Radius2.4[2] Template:Solar radius
Luminosity47[2] Template:Solar luminosity
Surface gravity (log g)3.95[2] cgs
Temperature9,729[2] K
Rotational velocity (v sin i)133[6] km/s
Age381[2] Myr
Metallicity [Fe/H]{{{metal_fe2}}} dex
B
Mass1.37 Template:Solar mass
Rotational velocity (v sin i)133[12] km/s
C
Mass1.31 Template:Solar mass
Metallicity [Fe/H] dex
Other designations
Template:Odlist[13]
HD 126129: Template:Odlist
HD 126128: Template:Odlist
Database references
SIMBADdata
HD 126129
HD 126128

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HD 126129 and HD 126128 form a triple star in the northern constellation of Boötes. HD 126128 is a very close pair which lies at an angular separation of 6.250″ from the brightest member of the trio, HD 126129.[7]

The Hipparcos parallax for the combined triple is Script error: No such module "val"., suggesting a distance around 215 light years.[14] The Gaia DR3 parallax for HD 126129 (component A) indicates a distance close to 228 light years. Gaia DR3 does not contain a parallax for the BC pair HD 126128, but Gaia DR2 indicates an approximate distance of 330 light years. However, the stars are treated as being related and both are considered members of the IC 2391 supercluster.[15]

References

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  1. ↑ Script error: No such module "Citation/CS1".
  2. ↑ a b c d e f g h i j k Template:Cite Gaia DR3
  3. ↑ a b Script error: No such module "Citation/CS1".
  4. ↑ a b c d Template:Cite Gaia DR3
  5. ↑ Script error: No such module "Citation/CS1".
  6. ↑ a b Script error: No such module "Citation/CS1".
  7. ↑ a b c Script error: No such module "Citation/CS1".
  8. ↑ a b c d Script error: No such module "Citation/CS1".
  9. ↑ a b Script error: No such module "Citation/CS1".
  10. ↑ Template:Cite Gaia DR2
  11. ↑ Script error: No such module "Citation/CS1".
  12. ↑ Script error: No such module "Citation/CS1".
  13. ↑ Template:Cite simbad
  14. ↑ Script error: No such module "Citation/CS1".
  15. ↑ Script error: No such module "Citation/CS1".

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External links

Template:Stars of Boötes

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