Phi Aurigae

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Template:Short description

φ Aurigae
Template:Location mark
Location of φ Aurigae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga[1]
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) 5.089[3]
Characteristics
Spectral type K3 IIIp[4]
U−B Template:Engvar +1.649[3]
B−V Template:Engvar +1.411[3]
R−I Template:Engvar 0.47Script error: No such module "Unsubst".
Astrometry
Radial velocity (Rv)+30.78±0.21[5] km/s
Proper motion (μ) RA: −1.050 mas/yr[2]
Dec.: −38.934 mas/yr[2]
Parallax (π)6.4359±0.1095 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)−0.62[1]
Details
RadiusScript error: No such module "val".[6] Template:Solar radius
LuminosityScript error: No such module "val".[6] Template:Solar luminosity
Surface gravity (log g)1.75[4] cgs
Temperature4,222[6] K
Metallicity [Fe/H]−0.03[4] dex
Rotational velocity (v sin i)1.6[7] km/s
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[8]
Database references
SIMBADdata

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File:Phi Aurigae.jpg
φ Aurigae in optical light

Phi Aurigae is a giant star in the northern constellation of Auriga. Its name is a Bayer designation that is Latinized from φ Aurigae, and abbreviated Phi Aur or φ Aur. This star is faintly visible to the naked eye with an apparent visual magnitude of 5.089.[3] It lies Script error: No such module "val". from another faint naked-eye star HD 35520, between the three open clusters M36 and M38, and NGC 1893.

The distance to this star, as determined from parallax measurements, is approximately Script error: No such module "convert". with a 9 light-year margin of error.[2] It is drifting further away from the Sun with a radial velocity of +31 km/s.[5]

This is an evolved giant star with a stellar classification of K3 IIIp.[4] Having exhausted the supply of hydrogen at its core, it has expanded to 34 times the radius of the Sun. It is radiating over 300[6] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,222 K,[6] giving it the cool orange-hued glow of a K-type star.

References

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  1. ↑ a b Template:Cite XHIP
  2. ↑ a b c d e Template:Cite DR3
  3. ↑ a b c d Script error: No such module "citation/CS1".
  4. ↑ a b c d Script error: No such module "citation/CS1".
  5. ↑ a b Script error: No such module "citation/CS1".
  6. ↑ a b c d e Script error: No such module "citation/CS1". Phi Aurigae's database entry at VizieR.
  7. ↑ Script error: No such module "citation/CS1".
  8. ↑ Template:Cite simbad

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External links

Template:Stars of Auriga

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