| Identification Data |
| Common Name | Alpheratz |
| Constellation | Andromeda |
| Star Name | 21alp And |
| Skymap Number | 80054 |
| Henry Draper (HD) Number | 358 |
| Harvard Revised (HR) Number | 15 |
| SAO Number | 73765 |
| Durchmusterung (DM) Number | BD+28 4 |
Washington Double Stars (WDS) Number
| 00084+2905
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 89441 |
| Right Ascension (RA) J2000 | 0h 8m 23.258s |
| Declination (Dec) J2000 | +29° 5' 25.555" |
| Position Uncertainty | 0.0068s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.01035 |
| Proper Motion in Dec (J2000) | -0.163066 |
| Radial Velocity | -011.7km s-1 |
| Trigonometric Parallax | +0.03360s |
| Trigonometric Parallax Uncertainty | 0.00073s |
| GCI Unit Vector in X (J2000) | 0.873268 |
| GCI Unit Vector in Y (J2000) | 0.031974 |
| GCI Unit Vector in Z (J2000) | 0.486189 |
| Galactic Longitude | 111.74° |
Galactic Latitude
| -32.84°
|
| Observational Data |
| Observed Visual Magnitude (V) | 2.06 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.004 |
| Observed B Magnitude | 2.02 |
| Observed B-V Colour | -0.043 |
| 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 | 2.2 |
| Observed Photographic Magnitude | |
| Morgan Keenan (MK) Spectral Type | B9IV:pHgMn |
| One-Dimensional Spectral Class | A0 |
| Position Angle | 280 |
| Year of Observation | 1954. AD |
