Identification Data |
Common Name | |
Constellation | Ophiuchus |
Star Name | 69tau Oph |
Skymap Number | 18030012 |
Henry Draper (HD) Number | 164764 |
Harvard Revised (HR) Number | 6733 |
SAO Number | 142050 |
Durchmusterung (DM) Number | SD-08 4549 |
Washington Double Stars (WDS) Number
| 18031-0811
|
Positional Data |
Position and Proper Motion (PPM) Number | 201336 |
Right Ascension (RA) J2000 | 18h 3m 4.807s |
Declination (Dec) J2000 | -8° 10' 48.904" |
Position Uncertainty | 0.0197s |
Proper Motion in RA (J2000)/cos(Dec) | +0.00184 |
Proper Motion in Dec (J2000) | -0.030767 |
Radial Velocity | -039.9km s-1 |
Trigonometric Parallax | +0.01922s |
Trigonometric Parallax Uncertainty | 0.00097s |
GCI Unit Vector in X (J2000) | 0.013302 |
GCI Unit Vector in Y (J2000) | -0.989736 |
GCI Unit Vector in Z (J2000) | -0.142288 |
Galactic Longitude | 20.07° |
Galactic Latitude
| 6.87°
|
Observational Data |
Observed Visual Magnitude (V) | 4.77 |
Derived Visual Magnitude | |
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | |
Observed B Magnitude | 5.18 |
Observed B-V Colour | +0.410 |
Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.014 |
Observed U Magnitude | |
Observed U-B Colour | |
Observed U Magnitude or (U-B) Magnitude Uncertainty | |
Observed Photovisual Magnitude | 6.0 |
Observed Photographic Magnitude | 6.3 |
Morgan Keenan (MK) Spectral Type | F5V |
One-Dimensional Spectral Class | F0 |
Position Angle | 281 |
Year of Observation | 1994. AD |