| Identification Data |
| Common Name | |
| Constellation | Ophiuchus |
| Star Name | 51 Oph |
| Skymap Number | 17310082 |
| Henry Draper (HD) Number | 158643 |
| Harvard Revised (HR) Number | 6519 |
| SAO Number | 185470 |
| Durchmusterung (DM) Number | CD-2313412 |
Washington Double Stars (WDS) Number
|
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 266959 |
| Right Ascension (RA) J2000 | 17h 31m 24.954s |
| Declination (Dec) J2000 | -23° 57' 45.516" |
| Position Uncertainty | 0.0085s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.00036 |
| Proper Motion in Dec (J2000) | -0.025966 |
| Radial Velocity | -012.0km s-1 |
| Trigonometric Parallax | +0.00765s |
| Trigonometric Parallax Uncertainty | 0.00087s |
| GCI Unit Vector in X (J2000) | -0.113677 |
| GCI Unit Vector in Y (J2000) | -0.906712 |
| GCI Unit Vector in Z (J2000) | -0.406141 |
| Galactic Longitude | 2.53° |
Galactic Latitude
| 5.34°
|
| Observational Data |
| Observed Visual Magnitude (V) | 4.80 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.003 |
| Observed B Magnitude | 4.81 |
| Observed B-V Colour | +0.013 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.004 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 4.8 |
| Observed Photographic Magnitude | 4.9 |
| Morgan Keenan (MK) Spectral Type | B9.5Ve |
| One-Dimensional Spectral Class | A0 |
| Position Angle | |
| Year of Observation | AD |
