| Identification Data |
| Common Name | Marfak |
| Constellation | Cassiopeia |
| Star Name | 33the Cas |
| Skymap Number | 1110010 |
| Henry Draper (HD) Number | 6961 |
| Harvard Revised (HR) Number | 343 |
| SAO Number | 22070 |
| Durchmusterung (DM) Number | BD+54 236 |
Washington Double Stars (WDS) Number
| 01111+5509
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 26092 |
| Right Ascension (RA) J2000 | 1h 11m 6.162s |
| Declination (Dec) J2000 | +55° 8' 59.642" |
| Position Uncertainty | 0.0056s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.02644 |
| Proper Motion in Dec (J2000) | -0.019366 |
| Radial Velocity | +007.5km s-1 |
| Trigonometric Parallax | +0.02373s |
| Trigonometric Parallax Uncertainty | 0.00068s |
| GCI Unit Vector in X (J2000) | 0.544151 |
| GCI Unit Vector in Y (J2000) | 0.174453 |
| GCI Unit Vector in Z (J2000) | 0.820650 |
| Galactic Longitude | 125.77° |
Galactic Latitude
| -7.61°
|
| Observational Data |
| Observed Visual Magnitude (V) | 4.34 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.001 |
| Observed B Magnitude | 4.52 |
| Observed B-V Colour | +0.179 |
| 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 | 4.5 |
| Observed Photographic Magnitude | 4.7 |
| Morgan Keenan (MK) Spectral Type | A7V |
| One-Dimensional Spectral Class | A5 |
| Position Angle | 135 |
| Year of Observation | 1907. AD |
