| Identification Data |
| Common Name | Double Double (7051) |
| Constellation | Lyra |
| Star Name | 4eps1Lyr |
| Skymap Number | 18440263 |
| Henry Draper (HD) Number | 173582 |
| Harvard Revised (HR) Number | 7051 |
| SAO Number | 67310 |
| Durchmusterung (DM) Number | BD+39 3509 |
Washington Double Stars (WDS) Number
| 18443+3940
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 81725 |
| Right Ascension (RA) J2000 | 18h 44m 20.345s |
| Declination (Dec) J2000 | +39° 40' 12.444" |
| Position Uncertainty | 0.0099s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.00091 |
| Proper Motion in Dec (J2000) | +0.060267 |
| Radial Velocity | -031.2km s-1 |
| Trigonometric Parallax | +0.02010s |
| Trigonometric Parallax Uncertainty | 0.00076s |
| GCI Unit Vector in X (J2000) | 0.147990 |
| GCI Unit Vector in Y (J2000) | -0.755372 |
| GCI Unit Vector in Z (J2000) | 0.638367 |
| Galactic Longitude | 68.85° |
Galactic Latitude
| 18.20°
|
| Observational Data |
| Observed Visual Magnitude (V) | 5.01 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.005 |
| Observed B Magnitude | 5.13 |
| Observed B-V Colour | +0.124 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.008 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 5.1 |
| Observed Photographic Magnitude | 5.1 |
| Morgan Keenan (MK) Spectral Type | A4V |
| One-Dimensional Spectral Class | A3 |
| Position Angle | 353 |
| Year of Observation | 1992. AD |
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