| Identity |
| Name: | Unukalhai, alpha Serpentis |
| Hipparcos catalog ID: | 77070 |
| Other star catalog entries: | HD 140573
SAO 121157
BD B+06 3088
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| Appearance |
| Visual magnitude: | 2.63 (source: Hipparcos) |
| Spectral type: | K2III |
| |
| Position and motion (Epoch J1991.25) in J2000 reference frame |
| Right ascension | 15h 44m 15.99575s (+/-0.00001s) |
| Declination | 6° 25' 31.8712" (+/-0.0001") |
| Parallax: | 44.10 (+/-0.19) mas |
| Derived distance: | 74.0 light-years |
| Proper motion in R.A.: | 133.84 (+/-0.21) mas/year |
| Proper motion in declination: | 44.81 (+/-0.19) mas/year |
| Constellation: | Serpens | |