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 |