| Identification Data |
| Common Name | |
| Constellation | Virgo |
| Star Name | 21 Vir |
| Skymap Number | 12330118 |
| Henry Draper (HD) Number | 109309 |
| Harvard Revised (HR) Number | 4781 |
| SAO Number | 138845 |
| Durchmusterung (DM) Number | SD-08 3372 |
Washington Double Stars (WDS) Number
|
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 195599 |
| Right Ascension (RA) J2000 | 12h 33m 46.748s |
| Declination (Dec) J2000 | -9° 27' 7.479" |
| Position Uncertainty | 0.0076s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.00556 |
| Proper Motion in Dec (J2000) | +0.000166 |
| Radial Velocity | -011.0km s-1 |
| Trigonometric Parallax | +0.01247s |
| Trigonometric Parallax Uncertainty | 0.00081s |
| GCI Unit Vector in X (J2000) | -0.975728 |
| GCI Unit Vector in Y (J2000) | -0.144862 |
| GCI Unit Vector in Z (J2000) | -0.164223 |
| Galactic Longitude | 295.67° |
Galactic Latitude
| 53.17°
|
| Observational Data |
| Observed Visual Magnitude (V) | 5.50 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.003 |
| Observed B Magnitude | 5.46 |
| Observed B-V Colour | -0.037 |
| 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 | 5.6 |
| Observed Photographic Magnitude | 5.4 |
| Morgan Keenan (MK) Spectral Type | A0V |
| One-Dimensional Spectral Class | A0 |
| Position Angle | |
| Year of Observation | AD |
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