2 Persei

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2 Persei
Observation data
Epoch J2000      Equinox J2000
Constellation Perseus
Right ascension 01h 52m 09.3723s[1]
Declination +50° 47′ 34.054″[1]
Apparent magnitude (V) 5.70[2]
Characteristics
Spectral type B9pHgMn[3]
B−V color index −0.067±0.004[2]
Distance
478 ± 8 ly
(147 ± 2 pc)
Absolute magnitude (MV)−0.14[2]
Semi-amplitude
(K1)
(primary)		26.5±0.3 km/s
Details
Myr
HR 536, SAO 22696[6]
Database references
SIMBADdata

2 Persei is a

apparent visual magnitude is 5.70.[2] The system is moving further away from the Earth with a heliocentric radial velocity of 11 km/s.[4]

In 1970

spectroscopic binary.[7][5] Follow up observations led to the determination that it had a nearly circular orbit with a period of 5.6 days.[4] The visible component is a chemically peculiar mercury-manganese star with a stellar classification of B9pHgMn.[3] Other analyses of its spectrum have assigned it the giant star spectral type of B9III.[8]

References

  1. ^
    S2CID 244398875
    . Gaia DR3 record for this source at VizieR.
  2. ^
    S2CID 119257644
    .
  3. ^
    doi:10.1086/110819
    .
  4. ^
    Bibcode:1975JRASC..69...22H
    .
  5. ^
    doi:10.1086/340590
    .
  6. ^ "2 Per". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-03-19.
  7. Bibcode:1970MmRAS..72..233H
    .
  8. Bibcode:1990A&AS...85.1069S
    .
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