Identification Data |
Common Name | Rukbat |
Constellation | Saggitarius |
Star Name | alp Sgr |
Skymap Number | 19230189 |
Henry Draper (HD) Number | 181869 |
Harvard Revised (HR) Number | 7348 |
SAO Number | 229659 |
Durchmusterung (DM) Number | CD-4013245 |
Washington Double Stars (WDS) Number
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Positional Data |
Position and Proper Motion (PPM) Number | 325060 |
Right Ascension (RA) J2000 | 19h 23m 53.176s |
Declination (Dec) J2000 | -40° 36' 57.384" |
Position Uncertainty | 0.0135s |
Proper Motion in RA (J2000)/cos(Dec) | +0.00287 |
Proper Motion in Dec (J2000) | -0.120866 |
Radial Velocity | -000.7km s-1 |
Trigonometric Parallax | +0.01920s |
Trigonometric Parallax Uncertainty | 0.00099s |
GCI Unit Vector in X (J2000) | 0.271682 |
GCI Unit Vector in Y (J2000) | -0.708807 |
GCI Unit Vector in Z (J2000) | -0.650985 |
Galactic Longitude | 357.72° |
Galactic Latitude
| -23.09°
|
Observational Data |
Observed Visual Magnitude (V) | 3.96 |
Derived Visual Magnitude | |
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.003 |
Observed B Magnitude | 3.87 |
Observed B-V Colour | -0.087 |
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 | 4.1 |
Observed Photographic Magnitude | 4.1 |
Morgan Keenan (MK) Spectral Type | B8V |
One-Dimensional Spectral Class | B8 |
Position Angle | |
Year of Observation | AD |