| Identification Data |
| Common Name | Alniyat |
| Constellation | Scorpius |
| Star Name | 20sig Sco |
| Skymap Number | 16210027 |
| Henry Draper (HD) Number | 147165 |
| Harvard Revised (HR) Number | 6084 |
| SAO Number | 184336 |
| Durchmusterung (DM) Number | CD-2511485 |
Washington Double Stars (WDS) Number
| 16212-2536
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 265440 |
| Right Ascension (RA) J2000 | 16h 21m 11.316s |
| Declination (Dec) J2000 | -25° 35' 34.067" |
| Position Uncertainty | 0.0107s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.00074 |
| Proper Motion in Dec (J2000) | -0.018067 |
| Radial Velocity | -006.0km s-1 |
| Trigonometric Parallax | +0.00444s |
| Trigonometric Parallax Uncertainty | 0.00081s |
| GCI Unit Vector in X (J2000) | -0.376910 |
| GCI Unit Vector in Y (J2000) | -0.819353 |
| GCI Unit Vector in Z (J2000) | -0.431972 |
| Galactic Longitude | 351.32° |
Galactic Latitude
| 17.00°
|
| Observational Data |
| Observed Visual Magnitude (V) | 2.91 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.003 |
| Observed B Magnitude | 3.01 |
| Observed B-V Colour | +0.099 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.004 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 3.1 |
| Observed Photographic Magnitude | 2.9 |
| Morgan Keenan (MK) Spectral Type | B1III |
| One-Dimensional Spectral Class | B1 |
| Position Angle | 80 |
| Year of Observation | 1990. AD |
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