| Identification Data |
| Common Name | |
| Constellation | Taurus |
| Star Name | 139 Tau |
| Skymap Number | 5570223 |
| Henry Draper (HD) Number | 40111 |
| Harvard Revised (HR) Number | 2084 |
| SAO Number | 77775 |
| Durchmusterung (DM) Number | BD+25 1052 |
Washington Double Stars (WDS) Number
|
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 95153 |
| Right Ascension (RA) J2000 | 5h 57m 59.655s |
| Declination (Dec) J2000 | +25° 57' 14.083" |
| Position Uncertainty | 0.0094s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.00021 |
| Proper Motion in Dec (J2000) | -0.001766 |
| Radial Velocity | +008.0km s-1 |
| Trigonometric Parallax | +0.00155s |
| Trigonometric Parallax Uncertainty | 0.00084s |
| GCI Unit Vector in X (J2000) | 0.007869 |
| GCI Unit Vector in Y (J2000) | 0.899112 |
| GCI Unit Vector in Z (J2000) | 0.437648 |
| Galactic Longitude | 183.97° |
Galactic Latitude
| 0.84°
|
| Observational Data |
| Observed Visual Magnitude (V) | 4.83 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.002 |
| Observed B Magnitude | 4.74 |
| Observed B-V Colour | -0.091 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.002 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 4.9 |
| Observed Photographic Magnitude | 4.7 |
| Morgan Keenan (MK) Spectral Type | B0.5II |
| One-Dimensional Spectral Class | B2 |
| Position Angle | |
| Year of Observation | AD |
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