45 Herculis

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45 Herculis

An ultraviolet band light curve for V776 Herculis, adapted from Burke and Barr (1981)[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Hercules
Right ascension 16h 47m 46.41942s[2]
Declination +05° 14′ 48.2789″[2]
Apparent magnitude (V) 5.22[3]
Characteristics
Spectral type A1 Vp Si[4] or B9p Cr[5]
U−B color index +0.005[6]
B−V color index −0.025[6]
Variable type α2 CVn[7]
Distance
400 ± 10 ly
(122 ± 3 pc)
Absolute magnitude (MV)−0.18[9]
Details
Rotational velocity (v sin i)
44[13] km/s
HR 6234, SAO 121865, WDS 16478+0515[14]
Database references
SIMBADdata

45 Herculis is a solitary

apparent visual magnitude of 5.22.[3] Parallax measurements show this star to be about 400 light-years away from the Solar System.[2] It is moving closer to the Earth with a heliocentric radial velocity of −16 km/s.[8]

Cowley et at. (1969) assigned this object a classification of B9p Cr,

Sun's luminosity from its photosphere at an effective temperature of 9,333 K.[12]

References

  1. S2CID 122946991
    . Retrieved 10 January 2022.
  2. ^
    doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR
    .
  3. ^
    Bibcode:2002yCat.2237....0D
    .
  4. ^
    doi:10.1086/192182
    .
  5. ^
    doi:10.1086/110819
    .
  6. ^
    Bibcode:1986EgUBV........0M
    .
  7. ^
    S2CID 125853869
    .
  8. ^
    Bibcode:1953GCRV..C......0W
    .
  9. ^
    S2CID 119257644
    .
  10. ^
    S2CID 119215348
    .
  11. ^
    S2CID 96452769
    .
  12. ^
    doi:10.1086/190162
    .
  13. S2CID 14070763
    .
  14. ^ "45 Her". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-06-14.
  15. S2CID 14878976
    .
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