Psi2 Aurigae

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Psi2 Aurigae
Template:Location mark
Location of ψ2 Aurigae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga[1]
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) 4.79[3]
Characteristics
Spectral type K2- III[4]
U−B Template:Engvar +1.30[3]
B−V Template:Engvar +1.23[3]
R−I Template:Engvar 0.6Script error: No such module "Unsubst".
Astrometry
Radial velocity (Rv)Script error: No such module "val".[5] km/s
Proper motion (μ) RA: −0.576 mas/yr[2]
Dec.: −55.657 mas/yr[2]
Parallax (π)8.0927±0.1314 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)−0.72[1]
Details
Mass4.1[2] Template:Solar mass
Radius31[2] Template:Solar radius
Luminosity304[1] Template:Solar luminosity
Surface gravity (log g)2.30[6] cgs
Temperature4,410[6] K
Metallicity [Fe/H]−0.10[6] dex
Rotational velocity (v sin i)1.0[7] km/s
Age372[8] Myr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[9]
Database references
SIMBADdata

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Psi2 Aurigae is a star in the constellation Auriga. Its name is a Bayer designation that is Latinized from ψ2 Aurigae, and abbreviated Psi2 Aur or ψ2 Aur. This star is faintly visible to the naked eye with an apparent visual magnitude of 4.79.[3] Based upon parallax measurements, it is approximately Script error: No such module "convert". away from the Earth.[2] At that distance, the brightness of the star is diminished by 0.07 in magnitude from extinction caused by interstellar gas and dust.[5] ψ2 Aur is drifting further away from the Sun with a radial velocity of 16 km/s.[5]

This is as a evolved K-type giant star with a stellar classification of K2 III.[4] At an estimated age of 372 million years,[8] it has exhausted the supply of hydrogen at its core and expanded to 31 times the radius of the Sun.[2] It has 4.1 times the Sun's mass[2] and is radiating 304 times the Sun's luminosity[1] from its enlarged photosphere at an effective temperature of Script error: No such module "val"..[6]

ψ2 Aurigae was part of a much bigger constellation named Telescopium Herschelii. It was the constellation's second-brightest star before it fell out of use.[10]

References

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  1. ↑ a b c d Template:Cite XHIP
  2. ↑ a b c d e f g h i 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 Script error: No such module "citation/CS1".
  6. ↑ a b c d Script error: No such module "citation/CS1".
  7. ↑ Script error: No such module "citation/CS1".
  8. ↑ a b Script error: No such module "citation/CS1".
  9. ↑ Template:Cite simbad
  10. ↑ Script error: No such module "citation/CS1".

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External links

Template:Stars of Auriga

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