| Identity |
| Name: | sigma Ophiuchi |
| Hipparcos catalog ID: | 85355 |
| Other 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 |
| R.A. | 17h 26m 30.87961s (+/-0.00005s) |
| Decl. | 4° 8' 25.2326" (+/-0.0005") |
| Parallax: | 2.78 (+/-0.92) |
| Derived distance: | 1173 light years |
| Proper motion in R.A.: | 1.25 (+/-0.76) mas/year |
| Proper motion in decl.: | 7.09 (+/-0.53) mas/year |
| Constellation: | Ophiuchus | |