Identification Data |
Common Name | |
Constellation | Hydra |
Star Name | 2 Hya |
Skymap Number | 8260087 |
Henry Draper (HD) Number | 71297 |
Harvard Revised (HR) Number | 3321 |
SAO Number | 135916 |
Durchmusterung (DM) Number | SD-03 2345 |
Washington Double Stars (WDS) Number
| 08265-0359
|
Positional Data |
Position and Proper Motion (PPM) Number | 191345 |
Right Ascension (RA) J2000 | 8h 26m 27.208s |
Declination (Dec) J2000 | -3° 59' 14.925" |
Position Uncertainty | 0.0094s |
Proper Motion in RA (J2000)/cos(Dec) | -0.00229 |
Proper Motion in Dec (J2000) | -0.073866 |
Radial Velocity | +027.3km s-1 |
Trigonometric Parallax | +0.01883s |
Trigonometric Parallax Uncertainty | 0.00080s |
GCI Unit Vector in X (J2000) | -0.594968 |
GCI Unit Vector in Y (J2000) | 0.800735 |
GCI Unit Vector in Z (J2000) | -0.069538 |
Galactic Longitude | 227.97° |
Galactic Latitude
| 19.02°
|
Observational Data |
Observed Visual Magnitude (V) | 5.59 |
Derived Visual Magnitude | |
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.004 |
Observed B Magnitude | 5.81 |
Observed B-V Colour | +0.224 |
Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.006 |
Observed U Magnitude | |
Observed U-B Colour | |
Observed U Magnitude or (U-B) Magnitude Uncertainty | |
Observed Photovisual Magnitude | 5.7 |
Observed Photographic Magnitude | 5.6 |
Morgan Keenan (MK) Spectral Type | A5III-IV |
One-Dimensional Spectral Class | A5 |
Position Angle | 4 |
Year of Observation | 1977. AD |