| Identification Data |
| Common Name | Gacrux |
| Constellation | Crux |
| Star Name | gam Cru |
| Skymap Number | 12310034 |
| Henry Draper (HD) Number | 108903 |
| Harvard Revised (HR) Number | 4763 |
| SAO Number | 240019 |
| Durchmusterung (DM) Number | CP-56 5272 |
Washington Double Stars (WDS) Number
| 12312-5707
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 341058 |
| Right Ascension (RA) J2000 | 12h 31m 9.959s |
| Declination (Dec) J2000 | -57° 6' 47.562" |
| Position Uncertainty | 0.0063s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.00343 |
| Proper Motion in Dec (J2000) | -0.264366 |
| Radial Velocity | +021.3km s-1 |
| Trigonometric Parallax | +0.03709s |
| Trigonometric Parallax Uncertainty | 0.00067s |
| GCI Unit Vector in X (J2000) | -0.537968 |
| GCI Unit Vector in Y (J2000) | -0.073611 |
| GCI Unit Vector in Z (J2000) | -0.839745 |
| Galactic Longitude | 300.17° |
Galactic Latitude
| 5.65°
|
| Observational Data |
| Observed Visual Magnitude (V) | 1.65 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.004 |
| Observed B Magnitude | 3.17 |
| Observed B-V Colour | +1.516 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.005 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 1.6 |
| Observed Photographic Magnitude | 3.0 |
| Morgan Keenan (MK) Spectral Type | M3.5III |
| One-Dimensional Spectral Class | M0 |
| Position Angle | 31 |
| Year of Observation | 1919. AD |
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