| Identification Data |
| Common Name | |
| Constellation | Hydra |
| Star Name | 40ups2Hya |
| Skymap Number | 10050027 |
| Henry Draper (HD) Number | 87504 |
| Harvard Revised (HR) Number | 3970 |
| SAO Number | 155713 |
| Durchmusterung (DM) Number | SD-12 3073 |
Washington Double Stars (WDS) Number
|
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 222420 |
| Right Ascension (RA) J2000 | 10h 5m 7.470s |
| Declination (Dec) J2000 | -13° 3' 52.654" |
| Position Uncertainty | 0.0090s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.00257 |
| Proper Motion in Dec (J2000) | +0.019966 |
| Radial Velocity | +028.0km s-1 |
| Trigonometric Parallax | +0.01177s |
| Trigonometric Parallax Uncertainty | 0.00079s |
| GCI Unit Vector in X (J2000) | -0.854288 |
| GCI Unit Vector in Y (J2000) | 0.468075 |
| GCI Unit Vector in Z (J2000) | -0.226050 |
| Galactic Longitude | 252.47° |
Galactic Latitude
| 33.06°
|
| Observational Data |
| Observed Visual Magnitude (V) | 4.60 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.002 |
| Observed B Magnitude | 4.52 |
| Observed B-V Colour | -0.084 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.002 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 4.7 |
| Observed Photographic Magnitude | 4.7 |
| Morgan Keenan (MK) Spectral Type | B9III-IV |
| One-Dimensional Spectral Class | B8 |
| Position Angle | |
| Year of Observation | AD |
