| Identification Data |
| Common Name | |
| Constellation | Hydra |
| Star Name | 27 Hya |
| Skymap Number | 9200090 |
| Henry Draper (HD) Number | 80586 |
| Harvard Revised (HR) Number | 3709 |
| SAO Number | 136768 |
| Durchmusterung (DM) Number | SD-08 2643 |
Washington Double Stars (WDS) Number
| 09205-0933
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 192278 |
| Right Ascension (RA) J2000 | 9h 20m 29.018s |
| Declination (Dec) J2000 | -9° 33' 20.501" |
| Position Uncertainty | 0.0094s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.00091 |
| Proper Motion in Dec (J2000) | -0.026866 |
| Radial Velocity | +024.5km s-1 |
| Trigonometric Parallax | +0.01339s |
| Trigonometric Parallax Uncertainty | 0.00082s |
| GCI Unit Vector in X (J2000) | -0.756751 |
| GCI Unit Vector in Y (J2000) | 0.632273 |
| GCI Unit Vector in Z (J2000) | -0.166006 |
| Galactic Longitude | 241.09° |
Galactic Latitude
| 27.11°
|
| Observational Data |
| Observed Visual Magnitude (V) | 4.81 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.002 |
| Observed B Magnitude | 5.74 |
| Observed B-V Colour | +0.928 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.003 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 4.1 |
| Observed Photographic Magnitude | 5.8 |
| Morgan Keenan (MK) Spectral Type | G8III-IV+F5V |
| One-Dimensional Spectral Class | G5 |
| Position Angle | 211 |
| Year of Observation | 1963. AD |
