| Identification Data |
| Common Name | |
| Constellation | Crux |
| Star Name | eta Cru |
| Skymap Number | 12060106 |
| Henry Draper (HD) Number | 105211 |
| Harvard Revised (HR) Number | 4616 |
| SAO Number | 251742 |
| Durchmusterung (DM) Number | CP-63 2145 |
Washington Double Stars (WDS) Number
| 12069-6437
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 359197 |
| Right Ascension (RA) J2000 | 12h 6m 52.899s |
| Declination (Dec) J2000 | -64° 36' 49.428" |
| Position Uncertainty | 0.0055s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.00533 |
| Proper Motion in Dec (J2000) | -0.037566 |
| Radial Velocity | +009.0km s-1 |
| Trigonometric Parallax | +0.05079s |
| Trigonometric Parallax Uncertainty | 0.00051s |
| GCI Unit Vector in X (J2000) | -0.428525 |
| GCI Unit Vector in Y (J2000) | -0.012871 |
| GCI Unit Vector in Z (J2000) | -0.903438 |
| Galactic Longitude | 298.18° |
Galactic Latitude
| -2.15°
|
| Observational Data |
| Observed Visual Magnitude (V) | 4.14 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.002 |
| Observed B Magnitude | 4.49 |
| Observed B-V Colour | +0.348 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.003 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 3.8 |
| Observed Photographic Magnitude | 4.6 |
| Morgan Keenan (MK) Spectral Type | F2III |
| One-Dimensional Spectral Class | F0 |
| Position Angle | 299 |
| Year of Observation | 1918. AD |
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