| Identification Data |
| Common Name | |
| Constellation | Taurus |
| Star Name | 66 Tau |
| Skymap Number | 4230132 |
| Henry Draper (HD) Number | 27820 |
| Harvard Revised (HR) Number | 1381 |
| SAO Number | 111791 |
| Durchmusterung (DM) Number | BD+09 570 |
Washington Double Stars (WDS) Number
| 04239+0928
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 147502 |
| Right Ascension (RA) J2000 | 4h 23m 51.825s |
| Declination (Dec) J2000 | +9° 27' 39.483" |
| Position Uncertainty | 0.0134s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.00142 |
| Proper Motion in Dec (J2000) | -0.006766 |
| Radial Velocity | -003.5km s-1 |
| Trigonometric Parallax | +0.00823s |
| Trigonometric Parallax Uncertainty | 0.00094s |
| GCI Unit Vector in X (J2000) | 0.401740 |
| GCI Unit Vector in Y (J2000) | 0.900881 |
| GCI Unit Vector in Z (J2000) | 0.164376 |
| Galactic Longitude | 185.11° |
Galactic Latitude
| -26.88°
|
| Observational Data |
| Observed Visual Magnitude (V) | 5.11 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.004 |
| Observed B Magnitude | 5.19 |
| Observed B-V Colour | +0.082 |
| 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 | 5.2 |
| Morgan Keenan (MK) Spectral Type | A3V |
| One-Dimensional Spectral Class | A2 |
| Position Angle | |
| Year of Observation | 1991. AD |
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