Identification Data |
Common Name | |
Constellation | Ophiuchus |
Star Name | 40xi Oph |
Skymap Number | 17200198 |
Henry Draper (HD) Number | 156897 |
Harvard Revised (HR) Number | 6445 |
SAO Number | 185296 |
Durchmusterung (DM) Number | SD-20 4731 |
Washington Double Stars (WDS) Number
| 17210-2107
|
Positional Data |
Position and Proper Motion (PPM) Number | 266721 |
Right Ascension (RA) J2000 | 17h 21m 0.374s |
Declination (Dec) J2000 | -21° 6' 46.557" |
Position Uncertainty | 0.0123s |
Proper Motion in RA (J2000)/cos(Dec) | +0.01872 |
Proper Motion in Dec (J2000) | -0.204766 |
Radial Velocity | -008.8km s-1 |
Trigonometric Parallax | +0.05748s |
Trigonometric Parallax Uncertainty | 0.00093s |
GCI Unit Vector in X (J2000) | -0.157956 |
GCI Unit Vector in Y (J2000) | -0.919402 |
GCI Unit Vector in Z (J2000) | -0.360207 |
Galactic Longitude | 3.60° |
Galactic Latitude
| 8.92°
|
Observational Data |
Observed Visual Magnitude (V) | 4.39 |
Derived Visual Magnitude | |
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | |
Observed B Magnitude | 4.78 |
Observed B-V Colour | +0.394 |
Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.019 |
Observed U Magnitude | |
Observed U-B Colour | |
Observed U Magnitude or (U-B) Magnitude Uncertainty | |
Observed Photovisual Magnitude | 3.9 |
Observed Photographic Magnitude | 4.9 |
Morgan Keenan (MK) Spectral Type | F1III-IV |
One-Dimensional Spectral Class | F5 |
Position Angle | 44 |
Year of Observation | 1966. AD |