| Identification Data |
| Common Name | |
| Constellation | Taurus |
| Star Name | 109 Tau |
| Skymap Number | 5190056 |
| Henry Draper (HD) Number | 34559 |
| Harvard Revised (HR) Number | 1739 |
| SAO Number | 77097 |
| Durchmusterung (DM) Number | BD+21 816 |
Washington Double Stars (WDS) Number
|
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 94262 |
| Right Ascension (RA) J2000 | 5h 19m 16.602s |
| Declination (Dec) J2000 | +22° 5' 47.378" |
| Position Uncertainty | 0.0118s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.00141 |
| Proper Motion in Dec (J2000) | -0.081166 |
| Radial Velocity | +019.3km s-1 |
| Trigonometric Parallax | +0.01583s |
| Trigonometric Parallax Uncertainty | 0.00086s |
| GCI Unit Vector in X (J2000) | 0.163773 |
| GCI Unit Vector in Y (J2000) | 0.911963 |
| GCI Unit Vector in Z (J2000) | 0.376168 |
| Galactic Longitude | 182.54° |
Galactic Latitude
| -8.70°
|
| Observational Data |
| Observed Visual Magnitude (V) | 4.95 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.003 |
| Observed B Magnitude | 5.89 |
| Observed B-V Colour | +0.942 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.004 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 5.1 |
| Observed Photographic Magnitude | |
| Morgan Keenan (MK) Spectral Type | G8III |
| One-Dimensional Spectral Class | K0 |
| Position Angle | |
| Year of Observation | AD |
