| Identification Data |
| Common Name | |
| Constellation | Crux |
| Star Name | zet Cru |
| Skymap Number | 12180067 |
| Henry Draper (HD) Number | 106983 |
| Harvard Revised (HR) Number | 4679 |
| SAO Number | 251841 |
| Durchmusterung (DM) Number | CP-63 2235 |
Washington Double Stars (WDS) Number
| 12184-6400
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 359321 |
| Right Ascension (RA) J2000 | 12h 18m 26.248s |
| Declination (Dec) J2000 | -64° 0' 11.055" |
| Position Uncertainty | 0.0063s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.00505 |
| Proper Motion in Dec (J2000) | -0.010466 |
| Radial Velocity | +015.8km s-1 |
| Trigonometric Parallax | +0.00903s |
| Trigonometric Parallax Uncertainty | 0.00055s |
| GCI Unit Vector in X (J2000) | -0.436905 |
| GCI Unit Vector in Y (J2000) | -0.035224 |
| GCI Unit Vector in Z (J2000) | -0.898818 |
| Galactic Longitude | 299.33° |
Galactic Latitude
| -1.36°
|
| Observational Data |
| Observed Visual Magnitude (V) | 4.05 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.002 |
| Observed B Magnitude | 3.89 |
| Observed B-V Colour | -0.162 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.002 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 4.1 |
| Observed Photographic Magnitude | 4.1 |
| Morgan Keenan (MK) Spectral Type | B2.5V |
| One-Dimensional Spectral Class | B3 |
| Position Angle | 339 |
| Year of Observation | 1918. AD |
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