| Identification Data |
| Common Name | |
| Constellation | Hydra |
| Star Name | 15 Hya |
| Skymap Number | 8510107 |
| Henry Draper (HD) Number | 75737 |
| Harvard Revised (HR) Number | 3523 |
| SAO Number | 136345 |
| Durchmusterung (DM) Number | SD-06 2743 |
Washington Double Stars (WDS) Number
| 08516-0711
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 191777 |
| Right Ascension (RA) J2000 | 8h 51m 34.411s |
| Declination (Dec) J2000 | -7° 10' 38.012" |
| Position Uncertainty | 0.0091s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.00328 |
| Proper Motion in Dec (J2000) | -0.005367 |
| Radial Velocity | +037.0km s-1 |
| Trigonometric Parallax | +0.00668s |
| Trigonometric Parallax Uncertainty | 0.00088s |
| GCI Unit Vector in X (J2000) | -0.675303 |
| GCI Unit Vector in Y (J2000) | 0.726881 |
| GCI Unit Vector in Z (J2000) | -0.124939 |
| Galactic Longitude | 234.40° |
Galactic Latitude
| 22.64°
|
| Observational Data |
| Observed Visual Magnitude (V) | 5.57 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.006 |
| Observed B Magnitude | 5.72 |
| Observed B-V Colour | +0.153 |
| 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 | 6.0 |
| Observed Photographic Magnitude | 5.7 |
| Morgan Keenan (MK) Spectral Type | A4m |
| One-Dimensional Spectral Class | A2 |
| Position Angle | 128 |
| Year of Observation | 1980. AD |
