| Identification Data |
| Common Name | Markab |
| Constellation | Pegasus |
| Star Name | 54alp Peg |
| Skymap Number | 23040128 |
| Henry Draper (HD) Number | 218045 |
| Harvard Revised (HR) Number | 8781 |
| SAO Number | 108378 |
| Durchmusterung (DM) Number | BD+14 4926 |
Washington Double Stars (WDS) Number
|
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| Positional Data |
| Position and Proper Motion (PPM) Number | 142158 |
| Right Ascension (RA) J2000 | 23h 4m 45.653s |
| Declination (Dec) J2000 | +15° 12' 18.952" |
| Position Uncertainty | 0.0076s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.00422 |
| Proper Motion in Dec (J2000) | -0.042666 |
| Radial Velocity | -002.2km s-1 |
| Trigonometric Parallax | +0.02336s |
| Trigonometric Parallax Uncertainty | 0.00076s |
| GCI Unit Vector in X (J2000) | 0.937098 |
| GCI Unit Vector in Y (J2000) | -0.230343 |
| GCI Unit Vector in Z (J2000) | 0.262278 |
| Galactic Longitude | 88.29° |
Galactic Latitude
| -40.38°
|
| Observational Data |
| Observed Visual Magnitude (V) | 2.49 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.002 |
| Observed B Magnitude | 2.48 |
| Observed B-V Colour | -0.008 |
| 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 | 2.6 |
| Observed Photographic Magnitude | |
| Morgan Keenan (MK) Spectral Type | B9V |
| One-Dimensional Spectral Class | A0 |
| Position Angle | |
| Year of Observation | AD |
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