| Identification Data |
| Common Name | |
| Constellation | Hydra |
| Star Name | 42mu Hya |
| Skymap Number | 10260019 |
| Henry Draper (HD) Number | 90432 |
| Harvard Revised (HR) Number | 4094 |
| SAO Number | 155980 |
| Durchmusterung (DM) Number | SD-16 3052 |
Washington Double Stars (WDS) Number
|
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 222953 |
| Right Ascension (RA) J2000 | 10h 26m 5.426s |
| Declination (Dec) J2000 | -16° 50' 10.646" |
| Position Uncertainty | 0.0097s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.00895 |
| Proper Motion in Dec (J2000) | -0.080166 |
| Radial Velocity | +039.6km s-1 |
| Trigonometric Parallax | +0.01314s |
| Trigonometric Parallax Uncertainty | 0.00079s |
| GCI Unit Vector in X (J2000) | -0.877902 |
| GCI Unit Vector in Y (J2000) | 0.381311 |
| GCI Unit Vector in Z (J2000) | -0.289638 |
| Galactic Longitude | 260.00° |
Galactic Latitude
| 33.65°
|
| Observational Data |
| Observed Visual Magnitude (V) | 3.82 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.003 |
| Observed B Magnitude | 5.30 |
| Observed B-V Colour | +1.478 |
| 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 | 4.1 |
| Observed Photographic Magnitude | 5.2 |
| Morgan Keenan (MK) Spectral Type | K4+III |
| One-Dimensional Spectral Class | K5 |
| Position Angle | |
| Year of Observation | AD |
