| Identification Data |
| Common Name | |
| Constellation | Hydra |
| Star Name | 7eta Hya |
| Skymap Number | 8430053 |
| Henry Draper (HD) Number | 74280 |
| Harvard Revised (HR) Number | 3454 |
| SAO Number | 117050 |
| Durchmusterung (DM) Number | BD+03 2039 |
Washington Double Stars (WDS) Number
|
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 154889 |
| Right Ascension (RA) J2000 | 8h 43m 13.475s |
| Declination (Dec) J2000 | +3° 23' 55.184" |
| Position Uncertainty | 0.0107s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.00128 |
| Proper Motion in Dec (J2000) | -0.001366 |
| Radial Velocity | +016.8km s-1 |
| Trigonometric Parallax | +0.00699s |
| Trigonometric Parallax Uncertainty | 0.00092s |
| GCI Unit Vector in X (J2000) | -0.652352 |
| GCI Unit Vector in Y (J2000) | 0.755594 |
| GCI Unit Vector in Z (J2000) | 0.059283 |
| Galactic Longitude | 223.26° |
Galactic Latitude
| 26.32°
|
| Observational Data |
| Observed Visual Magnitude (V) | 4.29 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.003 |
| Observed B Magnitude | 4.11 |
| Observed B-V Colour | -0.179 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.004 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 4.3 |
| Observed Photographic Magnitude | 4.0 |
| Morgan Keenan (MK) Spectral Type | B3V |
| One-Dimensional Spectral Class | B3 |
| Position Angle | |
| Year of Observation | AD |
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