| Identification Data |
| Common Name | |
| Constellation | Cassiopeia |
| Star Name | 55 Cas |
| Skymap Number | 2140074 |
| Henry Draper (HD) Number | 13474 |
| Harvard Revised (HR) Number | 640 |
| SAO Number | 12180 |
| Durchmusterung (DM) Number | BD+65 239 |
Washington Double Stars (WDS) Number
| 02145+6631
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 13532 |
| Right Ascension (RA) J2000 | 2h 14m 29.093s |
| Declination (Dec) J2000 | +66° 31' 27.943" |
| Position Uncertainty | 0.0060s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.00116 |
| Proper Motion in Dec (J2000) | -0.005666 |
| Radial Velocity | -040.km s-1 |
| Trigonometric Parallax | +0.00442s |
| Trigonometric Parallax Uncertainty | 0.00061s |
| GCI Unit Vector in X (J2000) | 0.331719 |
| GCI Unit Vector in Y (J2000) | 0.220571 |
| GCI Unit Vector in Z (J2000) | 0.917230 |
| Galactic Longitude | 131.09° |
Galactic Latitude
| 4.98°
|
| Observational Data |
| Observed Visual Magnitude (V) | 6.06 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.003 |
| Observed B Magnitude | 6.70 |
| Observed B-V Colour | +0.638 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.004 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 6.2 |
| Observed Photographic Magnitude | |
| Morgan Keenan (MK) Spectral Type | G0II-III+B9V |
| One-Dimensional Spectral Class | A2 |
| Position Angle | 180 |
| Year of Observation | 1991. AD |
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