HD 216446

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HD 216446
Observation data
Epoch J2000      Equinox J2000
Constellation Cepheus
Right ascension 22h 47m 29.06123s[1]
Declination +83° 09′ 13.7788″[1]
Apparent magnitude (V) 4.77[2] (4.92 + 9.60)[3]
Characteristics
Spectral type K3III[4]
B−V color index 1.257±0.008[2]
Distance
319 ± 6 ly
(98 ± 2 pc)
Absolute magnitude (MV)−0.14[2]
Details
A
Rotational velocity (v sin i)
1.0[6] km/s
HR 8702, SAO 3794, WDS J22475+8309[7]
Database references
SIMBADdata

HD 216446 is a

light years from the Sun based on parallax, but is drifting closer with a radial velocity of −32 km/s.[1] It is predicted to come to within 188.7 light-years in around 1.876 million years.[2] The system has an absolute magnitude of −0.14.[2]

The magnitude 4.92

luminosity of the Sun from its enlarged photosphere at an effective temperature of 4288 K.[1]

The secondary companion, component B, is a magnitude 9.60 star located at an

″ from the primary, along a position angle of 38°, as of 1992.[3]

References

  1. ^
    doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR
    .
  2. ^
    S2CID 119257644
    .
  3. ^
    doi:10.1086/323920
    .
  4. ^
    doi:10.1086/191064
    .
  5. doi:10.1086/191527
  6. doi:10.1051/aas:1999401
    .
  7. ^ "HD 216446". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-08-01.
  8. S2CID 14878976
    .
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