| Identification Data |
| Common Name | |
| Constellation | Aquila |
| Star Name | 4 Aql |
| Skymap Number | 18440209 |
| Henry Draper (HD) Number | 173370 |
| Harvard Revised (HR) Number | 7040 |
| SAO Number | 123879 |
| Durchmusterung (DM) Number | BD+01 3766 |
Washington Double Stars (WDS) Number
|
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 166497 |
| Right Ascension (RA) J2000 | 18h 44m 49.938s |
| Declination (Dec) J2000 | +2° 3' 36.138" |
| Position Uncertainty | 0.0080s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.00059 |
| Proper Motion in Dec (J2000) | -0.015166 |
| Radial Velocity | -013.0km s-1 |
| Trigonometric Parallax | +0.00691s |
| Trigonometric Parallax Uncertainty | 0.00074s |
| GCI Unit Vector in X (J2000) | 0.194247 |
| GCI Unit Vector in Y (J2000) | -0.980294 |
| GCI Unit Vector in Z (J2000) | 0.035947 |
| Galactic Longitude | 34.02° |
Galactic Latitude
| 2.41°
|
| Observational Data |
| Observed Visual Magnitude (V) | 5.02 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.002 |
| Observed B Magnitude | 4.97 |
| Observed B-V Colour | -0.053 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.002 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 5.0 |
| Observed Photographic Magnitude | 4.8 |
| Morgan Keenan (MK) Spectral Type | B9V |
| One-Dimensional Spectral Class | B5 |
| Position Angle | |
| Year of Observation | AD |
Printer Version