| Identification Data |
| Common Name | Alniyat |
| Constellation | Scorpius |
| Star Name | 23tau Sco |
| Skymap Number | 16350164 |
| Henry Draper (HD) Number | 149438 |
| Harvard Revised (HR) Number | 6165 |
| SAO Number | 184481 |
| Durchmusterung (DM) Number | CD-2711015 |
Washington Double Stars (WDS) Number
|
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 265701 |
| Right Ascension (RA) J2000 | 16h 35m 52.953s |
| Declination (Dec) J2000 | -28° 12' 57.658" |
| Position Uncertainty | 0.0091s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.00065 |
| Proper Motion in Dec (J2000) | -0.022566 |
| Radial Velocity | +002.0km s-1 |
| Trigonometric Parallax | +0.00759s |
| Trigonometric Parallax Uncertainty | 0.00078s |
| GCI Unit Vector in X (J2000) | -0.316205 |
| GCI Unit Vector in Y (J2000) | -0.822482 |
| GCI Unit Vector in Z (J2000) | -0.472797 |
| Galactic Longitude | 351.54° |
Galactic Latitude
| 12.81°
|
| Observational Data |
| Observed Visual Magnitude (V) | 2.83 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.002 |
| Observed B Magnitude | 2.62 |
| Observed B-V Colour | -0.207 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.002 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 2.9 |
| Observed Photographic Magnitude | 2.7 |
| Morgan Keenan (MK) Spectral Type | B0V |
| One-Dimensional Spectral Class | B0 |
| Position Angle | |
| Year of Observation | AD |
