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67 Ophiuchi

67 Ophiuchi
Location of 67 Ophiuchi (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Ophiuchus
Right ascension 18h 00m 38.71619s[1]
Declination 2° 55′ 53.6324″[1]
Apparent magnitude (V) 3.93[2]
Characteristics
Spectral type B5Ib[3]
U−B color index -0.62[2]
B−V color index +0.03[2]
Astrometry
Radial velocity (Rv)−5.20[4] km/s
Proper motion (μ) RA: +1.15[1] mas/yr
Dec.: -9.35[1] mas/yr
Parallax (π)2.65 ± 0.54 mas[1]
Distance2020±200 ly
(620±60 pc)[5]
Absolute magnitude (MV)−3.5[6]
Details
Mass12.6±0.4[5] M☉
Radius31±4[5] R☉
Luminosity39,800+9,200
−7,500[5] L☉
Surface gravity (log g)3.03[7] cgs
Temperature14,700±300[5] K
Metallicity [Fe/H]-0.01[7] dex
Rotational velocity (v sin i)40[8] km/s
Age16.6+1.6
−1.5[5] Myr
Other designations
BD+02°3458, CCDM J18007+0256A, FK5 677, GC 24509, HIP 88192, HR 6714, HD 164353, SAO 123013, WDS J18006+0256A
Database references
SIMBADdata

67 Ophiuchi (67 Oph) is a class B5 Ib[3] (blue supergiant) star in the constellation Ophiuchus. Its apparent magnitude is 3.93[2] and it is approximately 2,000 light years away based on spectroscopy.[5] It is considered to be a member of the open cluster Collinder 359 (Melotte 186).

67 Oph has four companions. The closest is a magnitude 13.7 B1 main sequence star at 8.29", designated B. Component C (BD+02°3459) is the brightest close companion, a magnitude 8.1 B2 main sequence star at 54.32". Component D is a magnitude 12.5 star 8.37" from component C. Component E is a magnitude 10.9 star 46.53" from 67 Oph A.[9]

This star was once considered part of the obsolete constellation Taurus Poniatovii, but after the International Astronomical Union officially recognized constellations, it was placed in Ophiuchus.[10]

  1. ^ a b c d e Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Ducati2002 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Hoffleit1991 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  5. ^ a b c d e f g Cite error: The named reference quantitative was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference XHIP was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Wu2011 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Abt2002 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference WDS was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference ridpath was invoked but never defined (see the help page).

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