| Identification Data |
| Common Name | Achernar |
| Constellation | Eridanus |
| Star Name | alp Eri |
| Skymap Number | 1370101 |
| Henry Draper (HD) Number | 10144 |
| Harvard Revised (HR) Number | 472 |
| SAO Number | 232481 |
| Durchmusterung (DM) Number | CP-57 334 |
Washington Double Stars (WDS) Number
|
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 331199 |
| Right Ascension (RA) J2000 | 1h 37m 42.846s |
| Declination (Dec) J2000 | -57° 14' 12.327" |
| Position Uncertainty | 0.0072s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.01084 |
| Proper Motion in Dec (J2000) | -0.040166 |
| Radial Velocity | +016.0km s-1 |
| Trigonometric Parallax | +0.02268s |
| Trigonometric Parallax Uncertainty | 0.00057s |
| GCI Unit Vector in X (J2000) | 0.492722 |
| GCI Unit Vector in Y (J2000) | 0.223805 |
| GCI Unit Vector in Z (J2000) | -0.840914 |
| Galactic Longitude | 290.84° |
Galactic Latitude
| -58.79°
|
| Observational Data |
| Observed Visual Magnitude (V) | 0.54 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.009 |
| Observed B Magnitude | 0.48 |
| Observed B-V Colour | -0.058 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.012 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | .6 |
| Observed Photographic Magnitude | .5 |
| Morgan Keenan (MK) Spectral Type | B3Vnp(shell) |
| One-Dimensional Spectral Class | B5 |
| Position Angle | |
| Year of Observation | AD |
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