| Identity |
| Name: | Rasalhague, alpha Ophiuchi |
| Hipparcos catalog ID: | 86032 |
| Other catalog entries: | HD 159561
SAO 102932
BD B+12 3252
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| |
| Appearance |
| Visual magnitude: | 2.08 (source: ground based) |
| Spectral type: | A5III |
| |
| Position and motion (Epoch J1991.25) in J2000 reference frame |
| R.A. | 17h 34m 56.00477s (+/-0.00005s) |
| Decl. | 12° 33' 38.0730" (+/-0.0007") |
| Parallax: | 69.84 (+/-0.88) |
| Derived distance: | 46.7 light years |
| Proper motion in R.A.: | 110.08 (+/-1.02) mas/year |
| Proper motion in decl.: | -222.61 (+/-0.89) mas/year |
| Constellation: | Ophiuchus | |
| |
| Notes |
An orbital solution based on elements by H.J.Augensen, W.D.Heintz, Publ.
Astron.Soc.Pac., 104, 314, 1992, gives a semi-major axis of 71 mas for
the photocentre.
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