| Identification Data |
| Common Name | |
| Constellation | Hydra |
| Star Name | 23 Hya |
| Skymap Number | 9160126 |
| Henry Draper (HD) Number | 79910 |
| Harvard Revised (HR) Number | 3681 |
| SAO Number | 136725 |
| Durchmusterung (DM) Number | SD-05 2762 |
Washington Double Stars (WDS) Number
| 09167-0621
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 192210 |
| Right Ascension (RA) J2000 | 9h 16m 41.736s |
| Declination (Dec) J2000 | -6° 21' 11.320" |
| Position Uncertainty | 0.0294s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.00167 |
| Proper Motion in Dec (J2000) | +0.004366 |
| Radial Velocity | -007.8km s-1 |
| Trigonometric Parallax | +0.01170s |
| Trigonometric Parallax Uncertainty | 0.00100s |
| GCI Unit Vector in X (J2000) | -0.752050 |
| GCI Unit Vector in Y (J2000) | 0.649750 |
| GCI Unit Vector in Z (J2000) | -0.110656 |
| Galactic Longitude | 237.55° |
Galactic Latitude
| 28.25°
|
| Observational Data |
| Observed Visual Magnitude (V) | 5.23 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.003 |
| Observed B Magnitude | 6.41 |
| Observed B-V Colour | +1.182 |
| 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 | 5.4 |
| Observed Photographic Magnitude | 6.4 |
| Morgan Keenan (MK) Spectral Type | K2III |
| One-Dimensional Spectral Class | K0 |
| Position Angle | 282 |
| Year of Observation | 1959. AD |
