| Identification Data |
| Common Name | |
| Constellation | Hydra |
| Star Name | 28 Hya |
| Skymap Number | 9250086 |
| Henry Draper (HD) Number | 81420 |
| Harvard Revised (HR) Number | 3738 |
| SAO Number | 136832 |
| Durchmusterung (DM) Number | SD-04 2616 |
Washington Double Stars (WDS) Number
|
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 192352 |
| Right Ascension (RA) J2000 | 9h 25m 24.035s |
| Declination (Dec) J2000 | -5° 7' 2.617" |
| Position Uncertainty | 0.0112s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.00078 |
| Proper Motion in Dec (J2000) | -0.006166 |
| Radial Velocity | +005.3km s-1 |
| Trigonometric Parallax | +0.00483s |
| Trigonometric Parallax Uncertainty | 0.00089s |
| GCI Unit Vector in X (J2000) | -0.777864 |
| GCI Unit Vector in Y (J2000) | 0.622070 |
| GCI Unit Vector in Z (J2000) | -0.089197 |
| Galactic Longitude | 237.85° |
Galactic Latitude
| 30.73°
|
| Observational Data |
| Observed Visual Magnitude (V) | 5.58 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.005 |
| Observed B Magnitude | 7.09 |
| Observed B-V Colour | +1.512 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.009 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 5.8 |
| Observed Photographic Magnitude | 7.0 |
| Morgan Keenan (MK) Spectral Type | K5III |
| One-Dimensional Spectral Class | K5 |
| Position Angle | |
| Year of Observation | AD |
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