| Identification Data |
| Common Name | Merak |
| Constellation | Ursa Major |
| Star Name | 48bet UMa |
| Skymap Number | 11010116 |
| Henry Draper (HD) Number | 95418 |
| Harvard Revised (HR) Number | 4295 |
| SAO Number | 27876 |
| Durchmusterung (DM) Number | BD+57 1302 |
Washington Double Stars (WDS) Number
|
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| Positional Data |
| Position and Proper Motion (PPM) Number | 32912 |
| Right Ascension (RA) J2000 | 11h 1m 50.476s |
| Declination (Dec) J2000 | +56° 22' 56.736" |
| Position Uncertainty | 0.0047s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.00983 |
| Proper Motion in Dec (J2000) | +0.033766 |
| Radial Velocity | -012.0km s-1 |
| Trigonometric Parallax | +0.04107s |
| Trigonometric Parallax Uncertainty | 0.00060s |
| GCI Unit Vector in X (J2000) | -0.535916 |
| GCI Unit Vector in Y (J2000) | 0.138993 |
| GCI Unit Vector in Z (J2000) | 0.832751 |
| Galactic Longitude | 149.17° |
Galactic Latitude
| 54.80°
|
| Observational Data |
| Observed Visual Magnitude (V) | 2.35 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.002 |
| Observed B Magnitude | 2.38 |
| Observed B-V Colour | +0.029 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.002 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 2.4 |
| Observed Photographic Magnitude | |
| Morgan Keenan (MK) Spectral Type | A1V |
| One-Dimensional Spectral Class | A0 |
| Position Angle | |
| Year of Observation | AD |
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