HD 135438

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Template:Short description

HD 135438
Observation data
Epoch J2000      Equinox J2000
Constellation Boötes[1]
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) 5.97[3]
Characteristics
Evolutionary stage red giant branch[4]
Spectral type K5III[5] or M0III[4]
B−V Template:Engvar 1.52[6]
Astrometry
Radial velocity (Rv)Script error: No such module "val".[2] km/s
Proper motion (μ) RA: +41.485[2] mas/yr
Dec.: −28.200[2] mas/yr
Parallax (π)5.0111±0.1361 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)−0.33[7]
Details[4]
MassScript error: No such module "val". Template:Solar mass
RadiusScript error: No such module "val". Template:Solar radius
LuminosityScript error: No such module "val". Template:Solar luminosity
Surface gravity (log g)Script error: No such module "val". cgs
TemperatureScript error: No such module "val". K
Metallicity [Fe/H]Script error: No such module "val". dex
Rotation495? days
Rotational velocity (v sin i)4.72 km/s
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[8]
Database references
SIMBADdata

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HD 135438 is a red giant star in the northern constellation of Boötes. With an apparent magnitude of 6.0, it lies about 650 light-years away.

The star displays periodic radial velocity variations, likely caused by both intrinsic variability and an orbiting companion star, making this a probable single-lined spectroscopic binary. The companion star has at least half the mass of the Sun, and has an eccentric orbit with a period of about Script error: No such module "convert"..[4]

HD 135438 has a magnitude 9.36 visual companion at an angular separation of Script error: No such module "val". along a position angle of 158° (as of 2012).[9] Gaia Data Release 3 parallaxes indicate that the visual companion is an unrelated background star.[10]

References

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  1. ↑ Script error: No such module "Citation/CS1".
  2. ↑ a b c d e f Template:Cite Gaia DR3
  3. ↑ Script error: No such module "Citation/CS1".
  4. ↑ a b c d Script error: No such module "Citation/CS1".
  5. ↑ Script error: No such module "Citation/CS1".
  6. ↑ Script error: No such module "Citation/CS1".
  7. ↑ Script error: No such module "Citation/CS1".
  8. ↑ Template:Cite simbad
  9. ↑ Script error: No such module "Citation/CS1".
  10. ↑ Template:Cite Gaia DR3

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External links

Template:Stars of Boötes

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