  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ophiuchus |
| Right ascension | 18h 00m 38.71619s [1] |
| Declination | +02° 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] |
| Distance | 2,020±200 ly (620±60 pc) [5] |
| Absolute magnitude (MV) | −3.5 [6] |
| Details | |
| Mass | 12.6±0.4 [5] M☉ |
| Radius | 31±4 [5] R☉ |
| Luminosity | 39,800+9,200 −7,500 [5] L☉ |
| Surface gravity (log g) | 3.03 [7] cgs |
| Temperature | 14,700±300 [5] K |
| Metallicity [Fe/H] | −0.01 [7] dex |
| Rotational velocity (v sin i) | 40 [8] km/s |
| Age | 16.6+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 | |
| SIMBAD | data |
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]
