| Identification Data |
| Common Name | Alphekka |
| Constellation | Corona Borealis |
| Star Name | 5alp CrB |
| Skymap Number | 15340114 |
| Henry Draper (HD) Number | 139006 |
| Harvard Revised (HR) Number | 5793 |
| SAO Number | 83893 |
| Durchmusterung (DM) Number | BD+27 2512 |
Washington Double Stars (WDS) Number
|
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 104146 |
| Right Ascension (RA) J2000 | 15h 34m 41.268s |
| Declination (Dec) J2000 | +26° 42' 52.895" |
| Position Uncertainty | 0.0067s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.00898 |
| Proper Motion in Dec (J2000) | -0.089466 |
| Radial Velocity | +001.7km s-1 |
| Trigonometric Parallax | +0.04365s |
| Trigonometric Parallax Uncertainty | 0.00079s |
| GCI Unit Vector in X (J2000) | -0.529172 |
| GCI Unit Vector in Y (J2000) | -0.719641 |
| GCI Unit Vector in Z (J2000) | 0.449548 |
| Galactic Longitude | 41.87° |
Galactic Latitude
| 53.77°
|
| Observational Data |
| Observed Visual Magnitude (V) | 2.22 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.003 |
| Observed B Magnitude | 2.25 |
| Observed B-V Colour | +0.028 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.003 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 2.3 |
| Observed Photographic Magnitude | |
| Morgan Keenan (MK) Spectral Type | A0V+G5V |
| One-Dimensional Spectral Class | A0 |
| Position Angle | |
| Year of Observation | AD |
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