Identification Data |
Common Name | |
Constellation | Hercules |
Star Name | 22tau Her |
Skymap Number | 16190133 |
Henry Draper (HD) Number | 147394 |
Harvard Revised (HR) Number | 6092 |
SAO Number | 46028 |
Durchmusterung (DM) Number | BD+46 2169 |
Washington Double Stars (WDS) Number
| 16197+4619
|
Positional Data |
Position and Proper Motion (PPM) Number | 55342 |
Right Ascension (RA) J2000 | 16h 19m 44.436s |
Declination (Dec) J2000 | +46° 18' 48.119" |
Position Uncertainty | 0.0061s |
Proper Motion in RA (J2000)/cos(Dec) | -0.00127 |
Proper Motion in Dec (J2000) | +0.039366 |
Radial Velocity | -015.3km s-1 |
Trigonometric Parallax | +0.01037s |
Trigonometric Parallax Uncertainty | 0.00053s |
GCI Unit Vector in X (J2000) | -0.292617 |
GCI Unit Vector in Y (J2000) | -0.625668 |
GCI Unit Vector in Z (J2000) | 0.723128 |
Galactic Longitude | 72.48° |
Galactic Latitude
| 45.04°
|
Observational Data |
Observed Visual Magnitude (V) | 3.90 |
Derived Visual Magnitude | |
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.002 |
Observed B Magnitude | 3.76 |
Observed B-V Colour | -0.140 |
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 | 3.9 |
Observed Photographic Magnitude | |
Morgan Keenan (MK) Spectral Type | B5IV |
One-Dimensional Spectral Class | B5 |
Position Angle | 146 |
Year of Observation | 1958. AD |