Identification Data |
Common Name | |
Constellation | Aquila |
Star Name | 57 Aql |
Skymap Number | 19540135 |
Henry Draper (HD) Number | 188294 |
Harvard Revised (HR) Number | 7594 |
SAO Number | 143899 |
Durchmusterung (DM) Number | SD-08 5155 |
Washington Double Stars (WDS) Number
| 19546-0814
|
Positional Data |
Position and Proper Motion (PPM) Number | 203425 |
Right Ascension (RA) J2000 | 19h 54m 38.062s |
Declination (Dec) J2000 | -8° 14' 13.372" |
Position Uncertainty | 0.0109s |
Proper Motion in RA (J2000)/cos(Dec) | +0.00027 |
Proper Motion in Dec (J2000) | -0.030266 |
Radial Velocity | -005.0km s-1 |
Trigonometric Parallax | +0.00902s |
Trigonometric Parallax Uncertainty | 0.00109s |
GCI Unit Vector in X (J2000) | 0.474642 |
GCI Unit Vector in Y (J2000) | -0.868441 |
GCI Unit Vector in Z (J2000) | -0.143269 |
Galactic Longitude | 32.66° |
Galactic Latitude
| -17.77°
|
Observational Data |
Observed Visual Magnitude (V) | 6.44 |
Derived Visual Magnitude | |
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.008 |
Observed B Magnitude | 6.42 |
Observed B-V Colour | -0.019 |
Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.010 |
Observed U Magnitude | |
Observed U-B Colour | |
Observed U Magnitude or (U-B) Magnitude Uncertainty | |
Observed Photovisual Magnitude | 6.9 |
Observed Photographic Magnitude | 6.3 |
Morgan Keenan (MK) Spectral Type | B8V |
One-Dimensional Spectral Class | B7 |
Position Angle | |
Year of Observation | AD |