| Identification Data |
| Common Name | |
| Constellation | Hydrus |
| Star Name | tau2Hyi |
| Skymap Number | 1470125 |
| Henry Draper (HD) Number | 11604 |
| Harvard Revised (HR) Number | 550 |
| SAO Number | 258280 |
| Durchmusterung (DM) Number | CP-80 35 |
Washington Double Stars (WDS) Number
| 01478-8011
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 376094 |
| Right Ascension (RA) J2000 | 1h 47m 46.444s |
| Declination (Dec) J2000 | -80° 10' 34.720" |
| Position Uncertainty | 0.0067s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.02803 |
| Proper Motion in Dec (J2000) | -0.058466 |
| Radial Velocity | +030.1km s-1 |
| Trigonometric Parallax | +0.01613s |
| Trigonometric Parallax Uncertainty | 0.00052s |
| GCI Unit Vector in X (J2000) | 0.152097 |
| GCI Unit Vector in Y (J2000) | 0.077309 |
| GCI Unit Vector in Z (J2000) | -0.985337 |
| Galactic Longitude | 299.96° |
Galactic Latitude
| -36.63°
|
| Observational Data |
| Observed Visual Magnitude (V) | 6.05 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.003 |
| Observed B Magnitude | 6.39 |
| Observed B-V Colour | +0.336 |
| 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 | 6.1 |
| Observed Photographic Magnitude | |
| Morgan Keenan (MK) Spectral Type | F0IV |
| One-Dimensional Spectral Class | F0 |
| Position Angle | 28 |
| Year of Observation | 1918. AD |
