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 |