63 Ophiuchi

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63 Ophiuchi
Observation data
ICRS
)
Constellation Sagittarius
Right ascension 17h 54m 54.04315s[1]
Declination −24° 53′ 13.5444″[1]
Apparent magnitude (V) 6.20[2]
Characteristics
Spectral type O8II((f))[3]
U−B color index –0.89[4]
B−V color index +0.04[4]
Distance
3,600 ± 300 ly
(1,100 ± 100 pc)
Absolute magnitude (MV)−6.0[6]
Details
Rotational velocity (v sin i)
35[7]-86[8] km/s
HR 6672, SAO
 185928
Database references
SIMBADdata

63 Ophiuchi is an

Ca II line yields a more modest value of 2,605 ly (799 pc).[10] The star lies only 0.3° north of the galactic plane
.

In 1983, astronomers from the

′ (9–18 pc), surrounded by a diffuse envelope some 65–80′ (14–29 pc) across. At an estimated mass loss rate of (6–8) × 10−6 M☉/yr, it would take the star about (1–5) × 105 years to produce such a nebula from the outflow of its stellar wind.[11]

References

  1. ^
    doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR
    .
  2. Bibcode:2002yCat.2237....0D
    .
  3. S2CID 118847528
    .
  4. ^
    doi:10.1086/190852
  5. Bibcode:1953GCRV..C......0W
  6. S2CID 55115943
    .
  7. ^
    S2CID 119258285
    .
  8. S2CID 16932907
  9. S2CID 119268845
  10. doi:10.1051/0004-6361/20079144
  11. Bibcode:1983SvAL....9..344L
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