| Identification Data |
| Common Name | |
| Constellation | Hydrus |
| Star Name | the Hyi |
| Skymap Number | 3020039 |
| Henry Draper (HD) Number | 19400 |
| Harvard Revised (HR) Number | 939 |
| SAO Number | 255945 |
| Durchmusterung (DM) Number | CP-72 219 |
Washington Double Stars (WDS) Number
| 03023-7154
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 367896 |
| Right Ascension (RA) J2000 | 3h 2m 15.448s |
| Declination (Dec) J2000 | -71° 54' 8.844" |
| Position Uncertainty | 0.0063s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.00583 |
| Proper Motion in Dec (J2000) | +0.015966 |
| Radial Velocity | +011.8km s-1 |
| Trigonometric Parallax | +0.00621s |
| Trigonometric Parallax Uncertainty | 0.00050s |
| GCI Unit Vector in X (J2000) | 0.217478 |
| GCI Unit Vector in Y (J2000) | 0.221805 |
| GCI Unit Vector in Z (J2000) | -0.950529 |
| Galactic Longitude | 289.93° |
Galactic Latitude
| -41.76°
|
| Observational Data |
| Observed Visual Magnitude (V) | 5.51 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.003 |
| Observed B Magnitude | 5.38 |
| Observed B-V Colour | -0.126 |
| 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 | 5.5 |
| Observed Photographic Magnitude | 5.5 |
| Morgan Keenan (MK) Spectral Type | B3V+A0IV |
| One-Dimensional Spectral Class | B8 |
| Position Angle | 179 |
| Year of Observation | 1961. AD |
