HD 173780

Source: Wikipedia, the free encyclopedia.
HD 173780
Observation data
J2000.0
Constellation
Lyra
Right ascension 18h 46m 04.47950s[1]
Declination +26° 39′ 43.6644″[1]
Apparent magnitude (V) +4.84[2]
Characteristics
Evolutionary stage Horizontal-branch[3]
Spectral type K3III[4]
B−V color index 1.20[2]
Distance
237 ± 2 ly
(72.7 ± 0.7 pc)
Absolute magnitude (MV)0.37[5]
Details
Gyr
HR 7064, SAO 86418[8]
Database references
SIMBADdata

HD 173780 is a single

light years from the Sun based on parallax, but is drifting closer with a radial velocity of −17 km/s.[1]

This is an aging

luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,468 K.[1]

References

  1. ^
    doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR
    .
  2. ^
    S2CID 118505114
    .
  3. ^
    S2CID 16673121
    .
  4. ^
    doi:10.1086/191373
    .
  5. S2CID 119257644
    .
  6. ^
    S2CID 53480665
    .
  7. doi:10.1088/0004-6256/135/1/209
    .
  8. ^ "HD 173780". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-02-07.
  9. S2CID 14878976
    .
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