| Identification Data |
| Common Name | Alhena |
| Constellation | Gemini |
| Star Name | 24gam Gem |
| Skymap Number | 6370197 |
| Henry Draper (HD) Number | 47105 |
| Harvard Revised (HR) Number | 2421 |
| SAO Number | 95912 |
| Durchmusterung (DM) Number | BD+16 1223 |
Washington Double Stars (WDS) Number
| 06377+1624
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 122774 |
| Right Ascension (RA) J2000 | 6h 37m 42.701s |
| Declination (Dec) J2000 | +16° 23' 57.308" |
| Position Uncertainty | 0.0402s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.00014 |
| Proper Motion in Dec (J2000) | -0.066966 |
| Radial Velocity | -012.7km s-1 |
| Trigonometric Parallax | +0.03112s |
| Trigonometric Parallax Uncertainty | 0.00233s |
| GCI Unit Vector in X (J2000) | -0.157143 |
| GCI Unit Vector in Y (J2000) | 0.946360 |
| GCI Unit Vector in Z (J2000) | 0.282329 |
| Galactic Longitude | 196.78° |
Galactic Latitude
| 4.45°
|
| Observational Data |
| Observed Visual Magnitude (V) | 2.02 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.009 |
| Observed B Magnitude | |
| Observed B-V Colour | |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 1.9 |
| Observed Photographic Magnitude | |
| Morgan Keenan (MK) Spectral Type | A1IV |
| One-Dimensional Spectral Class | A0 |
| Position Angle | 295 |
| Year of Observation | 1907. AD |
