22 Andromedae

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Template:Short description

22 Andromedae
Template:Location mark
Location of 22 Andromedae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Andromeda
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) 5.04[2]
Characteristics
Spectral type F5 II[3] or F5 Ib–II metal-weak[4]
B−V Template:Engvar +0.04[2]
Astrometry
Radial velocity (Rv)Script error: No such module "val".[5] km/s
Proper motion (μ) RA: 5.472[1] mas/yr
Dec.: 0.086[1] mas/yr
Parallax (π)2.2233±0.3881 mas[1]
Distanceapprox. Template:Rnd ly
(approx. Template:Rnd pc)
Absolute magnitude (MV)−3.51[6]
Details
MassScript error: No such module "val".[3] Template:Solar mass
Radius17[7] Template:Solar radius
Luminosity1,436[8] Template:Solar luminosity
Surface gravity (log g)Script error: No such module "val".[3] cgs
TemperatureScript error: No such module "val".[3] K
Metallicity [Fe/H]Script error: No such module "val".[2] dex
Rotational velocity (v sin i)46[9] km/s
Age62[3] Myr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[10]
Database references
SIMBADdata

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22 Andromedae, abbreviated 22 And, is a single[11] star in the constellation Andromeda. 22 Andromedae is the Flamsteed designation. It is visible to the naked eye with an apparent visual magnitude of 5.04.[2] The distance to 22 And can be estimated from its annual parallax shift of just Script error: No such module "val".,[1] which shows it to be around 1,500 light years away. It is moving closer to the Earth with a heliocentric radial velocity of −8.2 km/s.[5]

This is a bright giant with a stellar classification of F5 II.[3] Gray et al. (2001) classify it as F5 Ib–II metal-weak, with the metallic lines matching a class of F0 whereas hydrogen lines match an F5.[4] It is around 62[3] million years old with a projected rotational velocity of 46 km/s.[9] The star has six[3] times the mass of the Sun and has expanded to about 17[7] times the Sun's radius. It is radiating 1,436[8] times the Sun's luminosity from its photosphere at an effective temperature of 6,270 km/s.[3]

References

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

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Template:Stars of Andromeda

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