| Identification Data |
| Common Name | |
| Constellation | Hydra |
| Star Name | 20 Hya |
| Skymap Number | 9090110 |
| Henry Draper (HD) Number | 78732 |
| Harvard Revised (HR) Number | 3641 |
| SAO Number | 136622 |
| Durchmusterung (DM) Number | SD-08 2593 |
Washington Double Stars (WDS) Number
|
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 192072 |
| Right Ascension (RA) J2000 | 9h 9m 35.569s |
| Declination (Dec) J2000 | -8° 47' 15.532" |
| Position Uncertainty | 0.0107s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.00120 |
| Proper Motion in Dec (J2000) | -0.007166 |
| Radial Velocity | +026.0km s-1 |
| Trigonometric Parallax | +0.00508s |
| Trigonometric Parallax Uncertainty | 0.00101s |
| GCI Unit Vector in X (J2000) | -0.727435 |
| GCI Unit Vector in Y (J2000) | 0.668953 |
| GCI Unit Vector in Z (J2000) | -0.152773 |
| Galactic Longitude | 238.62° |
Galactic Latitude
| 25.40°
|
| Observational Data |
| Observed Visual Magnitude (V) | 5.46 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.004 |
| Observed B Magnitude | 6.46 |
| Observed B-V Colour | +0.996 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.006 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 5.2 |
| Observed Photographic Magnitude | 6.4 |
| Morgan Keenan (MK) Spectral Type | G8II |
| One-Dimensional Spectral Class | G5 |
| Position Angle | |
| Year of Observation | AD |
