| Identification Data |
| Common Name | |
| Constellation | Hydra |
| Star Name | 55 Hya |
| Skymap Number | 14470057 |
| Henry Draper (HD) Number | 130158 |
| Harvard Revised (HR) Number | 5514 |
| SAO Number | 182875 |
| Durchmusterung (DM) Number | CD-2510534 |
Washington Double Stars (WDS) Number
|
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 263397 |
| Right Ascension (RA) J2000 | 14h 47m 22.554s |
| Declination (Dec) J2000 | -25° 37' 27.361" |
| Position Uncertainty | 0.0090s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.00058 |
| Proper Motion in Dec (J2000) | -0.013966 |
| Radial Velocity | -018.0km s-1 |
| Trigonometric Parallax | +0.00532s |
| Trigonometric Parallax Uncertainty | 0.00075s |
| GCI Unit Vector in X (J2000) | -0.671697 |
| GCI Unit Vector in Y (J2000) | -0.601494 |
| GCI Unit Vector in Z (J2000) | -0.432468 |
| Galactic Longitude | 333.34° |
Galactic Latitude
| 30.32°
|
| Observational Data |
| Observed Visual Magnitude (V) | 5.62 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.003 |
| Observed B Magnitude | 5.57 |
| Observed B-V Colour | -0.047 |
| 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 | 6.0 |
| Observed Photographic Magnitude | 5.7 |
| Morgan Keenan (MK) Spectral Type | A0IIIp |
| One-Dimensional Spectral Class | A0 |
| Position Angle | |
| Year of Observation | AD |
