Identification Data |
Common Name | Double Double (7052) |
Constellation | Lyra |
Star Name | 4eps1Lyr |
Skymap Number | 18440069 |
Henry Draper (HD) Number | 173583 |
Harvard Revised (HR) Number | 7052 |
SAO Number | 67309 |
Durchmusterung (DM) Number | BD+39 3509 |
Washington Double Stars (WDS) Number
| 18443+3940
|
Positional Data |
Position and Proper Motion (PPM) Number | |
Right Ascension (RA) J2000 | 18h 44m 20.311s |
Declination (Dec) J2000 | +39° 40' 14.846" |
Position Uncertainty | 0.0337s |
Proper Motion in RA (J2000)/cos(Dec) | +0.00014 |
Proper Motion in Dec (J2000) | +0.047267 |
Radial Velocity | -031.2km s-1 |
Trigonometric Parallax | +0.02010s |
Trigonometric Parallax Uncertainty | 0.00076s |
GCI Unit Vector in X (J2000) | 0.147986 |
GCI Unit Vector in Y (J2000) | -0.755365 |
GCI Unit Vector in Z (J2000) | 0.638375 |
Galactic Longitude | 68.85° |
Galactic Latitude
| 18.20°
|
Observational Data |
Observed Visual Magnitude (V) | 6.00 |
Derived Visual Magnitude | |
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.008 |
Observed B Magnitude | 6.30 |
Observed B-V Colour | +0.303 |
Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.012 |
Observed U Magnitude | |
Observed U-B Colour | |
Observed U Magnitude or (U-B) Magnitude Uncertainty | |
Observed Photovisual Magnitude | 6.0 |
Observed Photographic Magnitude | 6.1 |
Morgan Keenan (MK) Spectral Type | F1V |
One-Dimensional Spectral Class | A3 |
Position Angle | 353 |
Year of Observation | 1992. AD |