HD 21278

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HD 21278
Location of HD 21278 (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Perseus
Right ascension 03h 28m 03.07229s[1]
Declination 49° 03′ 46.3315″[1]
Apparent magnitude (V) 4.99[2]
Characteristics
Spectral type B5V[3]
U−B color index −0.56[4]
B−V color index −0.10[4]
Distance
580 ± 20 ly
(178 ± 7 pc)
Absolute magnitude (MV)−1.49[6]
Semi-amplitude
(K1)
(primary)		22.7±0.9 km/s
Semi-amplitude (K2)
(secondary)		49±3 km/s
Details
A
Myr
HR 1034, SAO 38849[12]
Database references
SIMBADdata

HD 21278 is a

light years from the Sun based on parallax,[1] and it is drifting further away with a radial velocity of +1.20 km/s.[5]

The binary nature of this star was announced in 1925 by

spectroscopic binary with an orbital period of 21.7 days and an eccentricity of 0.12.[7]

The primary component is a

luminosity of the Sun from its photosphere at an effective temperature of 15,274 K.[10]

References

  1. ^
    doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR
    .
  2. ^
    S2CID 119257644. Vizier catalog entry
  3. ^
    S2CID 119207634
    . 58.
  4. ^
    Bibcode:2014JAVSO..42..443M.Vizier catalog entry
  5. ^
    S2CID 119387088
    .
  6. ^
    S2CID 53370832
    .
  7. ^
    doi:10.1086/171534
    .
  8. ^
    doi:10.1093/mnras/stw059
    .
  9. ^
    S2CID 425754
    .
  10. ^
    S2CID 33401607
    .
  11. ^
    S2CID 118345778
    .
  12. ^ "HD 21278". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-12-16.
  13. doi:10.1086/142944
    .
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