Mu Ophiuchi

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Mu Ophiuchi
Location of μ Ophiuchi (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation
Ophiuchus
Right ascension 17h 37m 50.71308s[1]
Declination −8° 07′ 07.5749″[1]
Apparent magnitude (V) 4.62[2]
Characteristics
Spectral type B8II-IIIp:Mn[3]
U−B color index −0.20[2]
B−V color index +0.11[2]
Distance
750 ± 30 ly
(230 ± 10 pc)
Absolute magnitude (MV)-2.24[6]
Details
Rotational velocity (v sin i)
95[8] km/s
HR 6567, SAO 141772[9]
Database references
SIMBADdata

μ Ophiuchi, Latinized as Mu Ophiuchi, is a solitary,

light years away from the Sun based on parallax,[5] but is drifting closer with a radial velocity of −18.5 km/s.[4]

This object has a

projected rotational velocity of 95 km/s.[8]

In 2006, a new nearby star cluster, Mamajek 2 (/ˈmæmədʒɛk/), was discovered. Mu Ophiuchi is a candidate member.[12] The cluster has an estimated age of 120±25 million years.[13]

References

  1. ^
    doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR
    .
  2. ^
    Bibcode:2002yCat.2237....0D
    .
  3. ^
    doi:10.1086/111348
    .
  4. ^
    S2CID 119231169
    .
  5. ^
    S2CID 18759600. Vizier catalog entry
  6. S2CID 119257644. Vizier catalog entry
  7. S2CID 118345778. Vizier catalog entry
  8. ^
    doi:10.1086/340590
    .
  9. ^ "mu. Oph". SIMBAD. Centre de données astronomiques de Strasbourg.
  10. S2CID 14878976
    .
  11. doi:10.1051/0004-6361/200810788
    .
  12. S2CID 14070978
    .
  13. S2CID 15570695
    .
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