Psi4 Aurigae

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Psi4 Aurigae
Template:Location mark
Location of ψ4 Aurigae (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Auriga[1]
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) +5.02[3]
Characteristics
Spectral type K5 III[4]
U−B Template:Engvar +1.83[3]
B−V Template:Engvar +1.48[3]
Astrometry
Radial velocity (Rv)Script error: No such module "val".[5] km/s
Proper motion (μ) RA: −4.112 mas/yr[2]
Dec.: −30.066 mas/yr[2]
Parallax (π)10.1086±0.123 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)+0.06[1]
Details
Mass1.03Script error: No such module "Su".[6] Template:Solar mass
Radius24.9[7] Template:Solar radius
Luminosity182Script error: No such module "Su".[6] Template:Solar luminosity
Surface gravity (log g)Script error: No such module "val".[8] cgs
TemperatureScript error: No such module "val".[6] K
Metallicity [Fe/H]Script error: No such module "val".[8] dex
Rotational velocity (v sin i)4.8[5] km/s
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[9]
Database references
SIMBADdata

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Psi4 Aurigae is a single,[10] orange-hued star in the northern constellation of Auriga. Its name is a Bayer designation that is Latinized from ψ4 Aurigae, and abbreviated Psi4 Aur or ψ4 Aur. This star is visible to the naked eye with an apparent visual magnitude of +5.02.[3] With an annual parallax shift of Script error: No such module "val".,[2] it is approximately Script error: No such module "convert". distant from Earth. The star is drifting closer to the Sun with a radial velocity of −77 km/s,[5] and may approach to within Template:Cvt in around 1.1 million years.[1]

This is a evolved K-type giant star with a stellar classification of K5 III,[4] having exhausted the hydrogen at its core. With nearly the same mass as the Sun,[6] it has expanded to 25 times the Sun's radius. The star is radiating 182 times the Sun's luminosity from its enlarged photosphere at an effective temperature of about 4,158 K.[6] It is spinning with a projected rotational velocity of 4.8 km/s.[5] This is an α–enhanced star, displaying a significant enhancement of silicon in its atmosphere.[11]

Psi4 Aurigae was part of a much bigger constellation named Telescopium Herschelii before that asterism was no longer recognized by the International Astronomical Union (IAU).Script error: No such module "Unsubst".

References

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  1. ↑ a b c Template:Cite XHIP
  2. ↑ a b c d e Template:Cite Gaia DR3
  3. ↑ a b c d Script error: No such module "citation/CS1".
  4. ↑ a b Script error: No such module "citation/CS1".
  5. ↑ a b c d Script error: No such module "citation/CS1".
  6. ↑ a b c d e Script error: No such module "citation/CS1".
  7. ↑ Script error: No such module "citation/CS1". Psi4 Aurigae's database entry at VizieR.
  8. ↑ a b Script error: No such module "citation/CS1".
  9. ↑ Template:Cite simbad
  10. ↑ Script error: No such module "citation/CS1".
  11. ↑ Script error: No such module "citation/CS1".

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External links

Template:Stars of Auriga

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