| Identity |
| Name: | sigma Ophiuchi |
| Hipparcos catalog ID: | 85355 |
| Other star catalog entries: | HD 157999
SAO 122387
BD B+04 3422
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| Appearance |
| Visual magnitude: | 4.34 (source: ground based) |
| Spectral type: | K3IIvar |
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| Position and motion (Epoch J1991.25) in J2000 reference frame |
| Right ascension | 17h 26m 30.87962s (+/-0.00002s) |
| Declination | 4° 8' 25.2325" (+/-0.0002") |
| Parallax: | 3.62 (+/-0.29) mas |
| Derived distance: | 901 light-years |
| Proper motion in R.A.: | 0.72 (+/-0.29) mas/year |
| Proper motion in declination: | 7.03 (+/-0.19) mas/year |
| Constellation: | Ophiuchus | |