| Identification Data |
| Common Name | Adara |
| Constellation | Canis Major |
| Star Name | 21eps CMa |
| Skymap Number | 6580166 |
| Henry Draper (HD) Number | 52089 |
| Harvard Revised (HR) Number | 2618 |
| SAO Number | 172676 |
| Durchmusterung (DM) Number | CD-28 3666 |
Washington Double Stars (WDS) Number
| 06586-2858
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 251347 |
| Right Ascension (RA) J2000 | 6h 58m 37.548s |
| Declination (Dec) J2000 | -28° 58' 19.501" |
| Position Uncertainty | 0.0065s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.00020 |
| Proper Motion in Dec (J2000) | +0.002366 |
| Radial Velocity | +027.3km s-1 |
| Trigonometric Parallax | +0.00757s |
| Trigonometric Parallax Uncertainty | 0.00057s |
| GCI Unit Vector in X (J2000) | -0.221358 |
| GCI Unit Vector in Y (J2000) | 0.846388 |
| GCI Unit Vector in Z (J2000) | -0.484383 |
| Galactic Longitude | 239.83° |
Galactic Latitude
| -11.33°
|
| Observational Data |
| Observed Visual Magnitude (V) | 1.53 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.005 |
| Observed B Magnitude | 1.40 |
| Observed B-V Colour | -0.132 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.007 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 1.6 |
| Observed Photographic Magnitude | 1.4 |
| Morgan Keenan (MK) Spectral Type | B2II |
| One-Dimensional Spectral Class | B1 |
| Position Angle | 161 |
| Year of Observation | 1951. AD |
