Identification Data |
Common Name | |
Constellation | Boötes |
Star Name | 4tau Boo |
Skymap Number | 13470055 |
Henry Draper (HD) Number | 120136 |
Harvard Revised (HR) Number | 5185 |
SAO Number | 100706 |
Durchmusterung (DM) Number | BD+18 2782 |
Washington Double Stars (WDS) Number
| 13473+1727
|
Positional Data |
Position and Proper Motion (PPM) Number | 130070 |
Right Ascension (RA) J2000 | 13h 47m 15.742s |
Declination (Dec) J2000 | +17° 27' 24.862" |
Position Uncertainty | 0.0068s |
Proper Motion in RA (J2000)/cos(Dec) | -0.03357 |
Proper Motion in Dec (J2000) | +0.054266 |
Radial Velocity | -015.6km s-1 |
Trigonometric Parallax | +0.06412s |
Trigonometric Parallax Uncertainty | 0.00070s |
GCI Unit Vector in X (J2000) | -0.851359 |
GCI Unit Vector in Y (J2000) | -0.430343 |
GCI Unit Vector in Z (J2000) | 0.299988 |
Galactic Longitude | 358.96° |
Galactic Latitude
| 73.88°
|
Observational Data |
Observed Visual Magnitude (V) | 4.49 |
Derived Visual Magnitude | |
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.002 |
Observed B Magnitude | 4.99 |
Observed B-V Colour | +0.498 |
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 | 4.5 |
Observed Photographic Magnitude | |
Morgan Keenan (MK) Spectral Type | F6IV |
One-Dimensional Spectral Class | F5 |
Position Angle | 11 |
Year of Observation | 1970. AD |