| Identification Data |
| Common Name | |
| Constellation | Hydra |
| Star Name | 9 Hya |
| Skymap Number | 8410160 |
| Henry Draper (HD) Number | 74137 |
| Harvard Revised (HR) Number | 3441 |
| SAO Number | 154552 |
| Durchmusterung (DM) Number | SD-15 2554 |
Washington Double Stars (WDS) Number
| 08417-1557
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 220495 |
| Right Ascension (RA) J2000 | 8h 41m 43.336s |
| Declination (Dec) J2000 | -15° 56' 36.182" |
| Position Uncertainty | 0.0080s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.00025 |
| Proper Motion in Dec (J2000) | -0.096866 |
| Radial Velocity | -002.3km s-1 |
| Trigonometric Parallax | +0.01598s |
| Trigonometric Parallax Uncertainty | 0.00080s |
| GCI Unit Vector in X (J2000) | -0.623580 |
| GCI Unit Vector in Y (J2000) | 0.731912 |
| GCI Unit Vector in Z (J2000) | -0.274687 |
| Galactic Longitude | 240.63° |
Galactic Latitude
| 15.71°
|
| Observational Data |
| Observed Visual Magnitude (V) | 4.87 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.003 |
| Observed B Magnitude | 5.93 |
| Observed B-V Colour | +1.060 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.005 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 4.6 |
| Observed Photographic Magnitude | 6.0 |
| Morgan Keenan (MK) Spectral Type | G9.5III |
| One-Dimensional Spectral Class | K0 |
| Position Angle | 112 |
| Year of Observation | 1920. AD |
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