| Identification Data |
| Common Name | |
| Constellation | Hydra |
| Star Name | 12 Hya |
| Skymap Number | 8460089 |
| Henry Draper (HD) Number | 74918 |
| Harvard Revised (HR) Number | 3484 |
| SAO Number | 154622 |
| Durchmusterung (DM) Number | SD-13 2673 |
Washington Double Stars (WDS) Number
| 08464-1333
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 220588 |
| Right Ascension (RA) J2000 | 8h 46m 22.538s |
| Declination (Dec) J2000 | -13° 32' 51.792" |
| Position Uncertainty | 0.0152s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.00121 |
| Proper Motion in Dec (J2000) | -0.006266 |
| Radial Velocity | -007.6km s-1 |
| Trigonometric Parallax | +0.01438s |
| Trigonometric Parallax Uncertainty | 0.00151s |
| GCI Unit Vector in X (J2000) | -0.645375 |
| GCI Unit Vector in Y (J2000) | 0.727059 |
| GCI Unit Vector in Z (J2000) | -0.234255 |
| Galactic Longitude | 239.25° |
Galactic Latitude
| 18.01°
|
| Observational Data |
| Observed Visual Magnitude (V) | 4.32 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.002 |
| Observed B Magnitude | 5.21 |
| Observed B-V Colour | +0.894 |
| 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 | 3.7 |
| Observed Photographic Magnitude | 5.2 |
| Morgan Keenan (MK) Spectral Type | G8IIIFe-1 |
| One-Dimensional Spectral Class | G5 |
| Position Angle | 266 |
| Year of Observation | 1969. AD |
