V538 Aurigae

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Template:Short description

V538 Aurigae
File:V538AurLightCurve.png
A light curve for V538 Aurigae, plotted from TESS data.[1] The data was folded with the period of 10.86 days which was published by Gaidos et al. (2000).[2]
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension Template:RA[3]
Declination Template:DEC[3]
Apparent magnitude (V) 6.25[4]
Characteristics
Evolutionary stage Main sequence
Spectral type K1 V[5]
U−B Template:Engvar 0.50[4]
B−V Template:Engvar 0.84[4]
Variable type BY Dra[6]
Astrometry
Radial velocity (Rv)0.9[7] km/s
Proper motion (μ) RA: +2.784[3] mas/yr
Dec.: −523.602[3] mas/yr
Parallax (π)81.4300±0.0487 mas[3]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)5.75[8]
Details
Mass0.871[7] Template:Solar mass
RadiusScript error: No such module "val".[3] Template:Solar radius
LuminosityScript error: No such module "val".[3] Template:Solar luminosity
Surface gravity (log g)4.55[7] cgs
TemperatureScript error: No such module "val".[3] K
Metallicity [Fe/H]+0.16[9] dex
Rotation11 days[9]
Rotational velocity (v sin i)2.80[6] km/s
Age3.76[7] Gyr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[10]
Database references
SIMBADdata

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V538 Aurigae is a single[11] star in the northern constellation of Auriga. With an apparent visual magnitude of 6.23, this star requires good dark sky conditions to view with the naked eye. It is located at a distance of Script error: No such module "convert". from Sun based on parallax. The star is drifting further away with a radial velocity of 0.9 km/s.[7] It is a member of the Local Association,[5] and is most likely a thin disk star.[7]

Eric Gaidos et al. discovered that V538 Aurigae is a variable star based on observations by robotic telescopes[12] at Fairborn Observatory from 1993 through 1999, and they announced their discovery in 2000.[2] The star was given its variable star designation in 2006.[13] This is a BY Draconis variable,[6] which means it undergoes changes in luminosity because regions of pronounced surface magnetic activity are moved into and out of the line of sight from the Earth as the star rotates (once every 11 days).[9] It has a spectral class of K1 V, indicating that it is a K-type main sequence star.[5] The star has 87%[7] of the mass of the Sun and 82%[3] of the Sun's radius. It is an estimated 3.76 billion years old.[7] The star is radiating 48% of the Sun's luminosity from its photosphere at an effective temperature of 5,303 K.[3]

It has a common proper motion companion designated Vys 465 (HD 233153),[14] which is a red dwarf with a class of M0.5V and a visual magnitude of 9.87. Their projected separation is Script error: No such module "val"..[15]

References

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

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