| Identification Data |
| Common Name | Asterope |
| Constellation | Taurus |
| Star Name | 21 Tau |
| Skymap Number | 3450130 |
| Henry Draper (HD) Number | 23432 |
| Harvard Revised (HR) Number | 1151 |
| SAO Number | 76159 |
| Durchmusterung (DM) Number | BD+24 553 |
Washington Double Stars (WDS) Number
|
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 92844 |
| Right Ascension (RA) J2000 | 3h 45m 54.476s |
| Declination (Dec) J2000 | +24° 33' 16.240" |
| Position Uncertainty | 0.0096s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.00143 |
| Proper Motion in Dec (J2000) | -0.045466 |
| Radial Velocity | +005.5km s-1 |
| Trigonometric Parallax | +0.00843s |
| Trigonometric Parallax Uncertainty | 0.00089s |
| GCI Unit Vector in X (J2000) | 0.502328 |
| GCI Unit Vector in Y (J2000) | 0.758273 |
| GCI Unit Vector in Z (J2000) | 0.415559 |
| Galactic Longitude | 166.05° |
Galactic Latitude
| -23.36°
|
| Observational Data |
| Observed Visual Magnitude (V) | 5.77 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.004 |
| Observed B Magnitude | 5.73 |
| Observed B-V Colour | -0.036 |
| 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 | 5.9 |
| Observed Photographic Magnitude | 5.8 |
| Morgan Keenan (MK) Spectral Type | B8V |
| One-Dimensional Spectral Class | B8 |
| Position Angle | |
| Year of Observation | AD |
