19 Aquilae

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19 Aquilae

Image captured from Mount Laguna, California
Observation data
J2000.0
Constellation Aquila
Right ascension 19h 08m 59.90684s[1]
Declination +06° 04′ 23.4857″[1]
Apparent magnitude (V) 5.227[2]
Characteristics
Spectral type F0 III-IV[3]
Apparent magnitude (U) 5.59±0.010[4]
Apparent magnitude (B) 5.57±0.007[5]
Apparent magnitude (V) 5.23±0.009[5]
U−B color index +0.020[2]
B−V color index +0.345[2]
Variable type suspected γ Dor[6]
Distance
142 ± 1 ly
(43.6 ± 0.5 pc)
Absolute magnitude (MV)1.94[8]
Details
Gyr
HR 7266, SAO 124318[11]
Database references
SIMBADdata

19 Aquilae is a single

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

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

luminosity of the Sun from its photosphere at an effective temperature of 6,784 K.[9]

References

  1. ^
    doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR
    .
  2. ^
    Bibcode:1986A&AS...65..405O
    .
  3. ^
    doi:10.1086/168691
    .
  4. Bibcode:1984A&AS...57..357O
    .
  5. ^
    ISSN 0365-0138
    .
  6. ^
    S2CID 13047725
    .
  7. ^
    Bibcode:1999VeARI..35....1W
    .
  8. S2CID 118577511
    .
  9. ^
    S2CID 118505114
    .
  10. ^
    doi:10.1051/0004-6361:200810377[permanent dead link
    ]
  11. ^ "19 Aql". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-05-30.
  12. S2CID 14878976
    .
  13. S2CID 119267456
    .
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