| Identification Data |
| Common Name | Hyadum I |
| Constellation | Taurus |
| Star Name | 54gam Tau |
| Skymap Number | 4190117 |
| Henry Draper (HD) Number | 27371 |
| Harvard Revised (HR) Number | 1346 |
| SAO Number | 93868 |
| Durchmusterung (DM) Number | BD+15 612 |
Washington Double Stars (WDS) Number
| 04198+1538
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 119792 |
| Right Ascension (RA) J2000 | 4h 19m 47.603s |
| Declination (Dec) J2000 | +15° 37' 39.512" |
| Position Uncertainty | 0.0137s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.00798 |
| Proper Motion in Dec (J2000) | -0.023966 |
| Radial Velocity | +038.6km s-1 |
| Trigonometric Parallax | +0.02117s |
| Trigonometric Parallax Uncertainty | 0.00117s |
| GCI Unit Vector in X (J2000) | 0.407782 |
| GCI Unit Vector in Y (J2000) | 0.872437 |
| GCI Unit Vector in Z (J2000) | 0.269384 |
| Galactic Longitude | 179.09° |
Galactic Latitude
| -23.82°
|
| Observational Data |
| Observed Visual Magnitude (V) | 3.65 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.004 |
| Observed B Magnitude | 4.63 |
| Observed B-V Colour | +0.983 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.006 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 3.9 |
| Observed Photographic Magnitude | |
| Morgan Keenan (MK) Spectral Type | G9.5IIIabCN0.5 |
| One-Dimensional Spectral Class | K0 |
| Position Angle | 179 |
| Year of Observation | 1978. AD |
