Identification Data |
Common Name | Alathfar |
Constellation | Lyra |
Star Name | 2mu Lyr |
Skymap Number | 18240048 |
Henry Draper (HD) Number | 169702 |
Harvard Revised (HR) Number | 6903 |
SAO Number | 66943 |
Durchmusterung (DM) Number | BD+39 3410 |
Washington Double Stars (WDS) Number
|
|
Positional Data |
Position and Proper Motion (PPM) Number | 81293 |
Right Ascension (RA) J2000 | 18h 24m 13.785s |
Declination (Dec) J2000 | +39° 30' 26.059" |
Position Uncertainty | 0.0063s |
Proper Motion in RA (J2000)/cos(Dec) | -0.00184 |
Proper Motion in Dec (J2000) | -0.004666 |
Radial Velocity | -024.0km s-1 |
Trigonometric Parallax | +0.00739s |
Trigonometric Parallax Uncertainty | 0.00052s |
GCI Unit Vector in X (J2000) | 0.081418 |
GCI Unit Vector in Y (J2000) | -0.767236 |
GCI Unit Vector in Z (J2000) | 0.636176 |
Galactic Longitude | 67.33° |
Galactic Latitude
| 21.80°
|
Observational Data |
Observed Visual Magnitude (V) | 5.12 |
Derived Visual Magnitude | |
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.003 |
Observed B Magnitude | 5.16 |
Observed B-V Colour | +0.038 |
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 | 5.0 |
Observed Photographic Magnitude | |
Morgan Keenan (MK) Spectral Type | A3IVn |
One-Dimensional Spectral Class | A2 |
Position Angle | |
Year of Observation | AD |