19 Aquilae

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Template:Short description

19 Aquilae
File:19 Aquilae, 2007-04-21.jpg
Image captured from Mount Laguna, California
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Aquila
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) 5.227[2]
Characteristics
Spectral type F0 III-IV[3]
Apparent magnitude (U) Script error: No such module "val".[4]
Apparent magnitude (B) Script error: No such module "val".[5]
Apparent magnitude (V) Script error: No such module "val".[5]
U−B Template:Engvar +0.020[2]
B−V Template:Engvar +0.345[2]
Variable type suspected γ Dor[6]
Astrometry
Radial velocity (Rv)−46.7[7] km/s
Proper motion (μ) RA: −5.485[1] mas/yr
Dec.: −73.785[1] mas/yr
Parallax (π)22.9563±0.2397 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)1.94[8]
Details
Mass1.54[9] Template:Solar mass
RadiusScript error: No such module "val".[1] Template:Solar radius
LuminosityScript error: No such module "val".[1] Template:Solar luminosity
Surface gravity (log g)4.13[3] cgs
TemperatureScript error: No such module "val".[9] K
Metallicity [Fe/H]+0.03[3] dex
Rotational velocity (v sin i)57.0[10] km/s
Age2.25[9] Gyr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[11]
Database references
SIMBADdata

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19 Aquilae is a single[12] star located Script error: No such module "convert". away from the Sun in the equatorial constellation of Aquila. 19 Aquilae is the Flamsteed designation. It is visible to the naked eye as a dim, yellow-white hued star with an apparent visual magnitude of 5.23.[2] The star is moving closer to the Earth with a heliocentric radial velocity of −46.7 km/s.[7]

This object has a stellar classification of F0 III-IV,[3] with the luminosity class matching an evolving star transitioning from the subgiant to a giant stage. Poretti et al. (2003) list it as a suspected Gamma Doradus variable, and it is located near the cooler end of the instability strip on the Hertzsprung–Russell diagram.[6] These spatial coordinates are a source of X-ray emission, which is most likely coming from the star.[13]

19 Aquilae is an estimated 2.25[9] billion years old with a moderately high rate of spin, showing a projected rotational velocity of 57.0 km/s.[10] It has 1.54[9] times the mass of the Sun and 2.50[1] times the Sun's radius. The star is radiating 12.8[1] times the luminosity of the Sun from its photosphere at an effective temperature of 6,784 K.[9]

References

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

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Template:Stars of Aquila

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