Rasalhague (α Ophiuchi), is the brightest star in the constellation Ophiuchus. It is part of a double star system, is about 47 light-years (ly) away and has an apparent magnitude of 2.1 mag.
| Rasalhague | |
|---|---|
| Constellation | Ophiuchus |
| Right ascension | 17h 34m 56.07s |
| Declination | +12° 33′ 36.1″ |
| Apparent magnitude | 2.08 mag |
| Distance | 47.88 ly |
| Bayer designation | α Ophiuchi |
| Bright Star Catalogue | HR 6556 |
| Hipparcos Catalogue | HIP 86032 |
| SAO Catalogue | SAO 102932 |
