| Identification Data |
| Common Name | |
| Constellation | Cygnus |
| Star Name | 77 Cyg |
| Skymap Number | 21420079 |
| Henry Draper (HD) Number | 206644 |
| Harvard Revised (HR) Number | 8300 |
| SAO Number | 51207 |
| Durchmusterung (DM) Number | BD+40 4615 |
Washington Double Stars (WDS) Number
| 21424+4105
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 61902 |
| Right Ascension (RA) J2000 | 21h 42m 22.964s |
| Declination (Dec) J2000 | +41° 4' 37.226" |
| Position Uncertainty | 0.0130s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.00267 |
| Proper Motion in Dec (J2000) | +0.002367 |
| Radial Velocity | -024.5km s-1 |
| Trigonometric Parallax | +0.00876s |
| Trigonometric Parallax Uncertainty | 0.00061s |
| GCI Unit Vector in X (J2000) | 0.621961 |
| GCI Unit Vector in Y (J2000) | -0.425934 |
| GCI Unit Vector in Z (J2000) | 0.657073 |
| Galactic Longitude | 88.85° |
Galactic Latitude
| -8.96°
|
| Observational Data |
| Observed Visual Magnitude (V) | 5.73 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.003 |
| Observed B Magnitude | 5.78 |
| Observed B-V Colour | +0.051 |
| 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 | 5.5 |
| Observed Photographic Magnitude | 5.5 |
| Morgan Keenan (MK) Spectral Type | A0V |
| One-Dimensional Spectral Class | A0 |
| Position Angle | |
| Year of Observation | 1993. AD |
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