| Identification Data |
| Common Name | Alcor |
| Constellation | Ursa Major |
| Star Name | 80 UMa |
| Skymap Number | 13250029 |
| Henry Draper (HD) Number | 116842 |
| Harvard Revised (HR) Number | 5062 |
| SAO Number | 28751 |
| Durchmusterung (DM) Number | BD+55 1603 |
Washington Double Stars (WDS) Number
|
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 34021 |
| Right Ascension (RA) J2000 | 13h 25m 13.538s |
| Declination (Dec) J2000 | +54° 59' 16.648" |
| Position Uncertainty | 0.0059s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.01398 |
| Proper Motion in Dec (J2000) | -0.016966 |
| Radial Velocity | -008.9km s-1 |
| Trigonometric Parallax | +0.04019s |
| Trigonometric Parallax Uncertainty | 0.00057s |
| GCI Unit Vector in X (J2000) | -0.534533 |
| GCI Unit Vector in Y (J2000) | -0.208475 |
| GCI Unit Vector in Z (J2000) | 0.819031 |
| Galactic Longitude | 112.76° |
Galactic Latitude
| 61.47°
|
| Observational Data |
| Observed Visual Magnitude (V) | 4.00 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.002 |
| Observed B Magnitude | 4.18 |
| Observed B-V Colour | +0.183 |
| 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 | 4.0 |
| Observed Photographic Magnitude | 4.2 |
| Morgan Keenan (MK) Spectral Type | A5V |
| One-Dimensional Spectral Class | A5 |
| Position Angle | |
| Year of Observation | AD |
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