| Identification Data |
| Common Name | |
| Constellation | Hydra |
| Star Name | 1 Hya |
| Skymap Number | 8240116 |
| Henry Draper (HD) Number | 70958 |
| Harvard Revised (HR) Number | 3297 |
| SAO Number | 135877 |
| Durchmusterung (DM) Number | SD-03 2333 |
Washington Double Stars (WDS) Number
|
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 191306 |
| Right Ascension (RA) J2000 | 8h 24m 35.014s |
| Declination (Dec) J2000 | -3° 45' 4.465" |
| Position Uncertainty | 0.0097s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.01410 |
| Proper Motion in Dec (J2000) | -0.025866 |
| Radial Velocity | +071.8km s-1 |
| Trigonometric Parallax | +0.03675s |
| Trigonometric Parallax Uncertainty | 0.00087s |
| GCI Unit Vector in X (J2000) | -0.588580 |
| GCI Unit Vector in Y (J2000) | 0.805788 |
| GCI Unit Vector in Z (J2000) | -0.065425 |
| Galactic Longitude | 227.50° |
Galactic Latitude
| 18.74°
|
| Observational Data |
| Observed Visual Magnitude (V) | 5.62 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.003 |
| Observed B Magnitude | 6.09 |
| Observed B-V Colour | +0.469 |
| 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 | 5.8 |
| Observed Photographic Magnitude | 6.1 |
| Morgan Keenan (MK) Spectral Type | F3V |
| One-Dimensional Spectral Class | F5 |
| Position Angle | 186 |
| Year of Observation | 1988. AD |
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