| Identification Data |
| Common Name | |
| Constellation | Cygnus |
| Star Name | 51 Cyg |
| Skymap Number | 20420051 |
| Henry Draper (HD) Number | 197511 |
| Harvard Revised (HR) Number | 7929 |
| SAO Number | 32809 |
| Durchmusterung (DM) Number | BD+49 3353 |
Washington Double Stars (WDS) Number
| 20422+5020
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 38783 |
| Right Ascension (RA) J2000 | 20h 42m 12.627s |
| Declination (Dec) J2000 | +50° 20' 24.107" |
| Position Uncertainty | 0.0083s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.00012 |
| Proper Motion in Dec (J2000) | +0.003766 |
| Radial Velocity | -003.3km s-1 |
| Trigonometric Parallax | +0.00353s |
| Trigonometric Parallax Uncertainty | 0.00056s |
| GCI Unit Vector in X (J2000) | 0.414943 |
| GCI Unit Vector in Y (J2000) | -0.484933 |
| GCI Unit Vector in Z (J2000) | 0.769846 |
| Galactic Longitude | 88.38° |
Galactic Latitude
| 4.99°
|
| Observational Data |
| Observed Visual Magnitude (V) | 5.41 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.003 |
| Observed B Magnitude | 5.30 |
| Observed B-V Colour | -0.111 |
| 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 | 5.4 |
| Observed Photographic Magnitude | 5.2 |
| Morgan Keenan (MK) Spectral Type | B2V |
| One-Dimensional Spectral Class | B3 |
| Position Angle | 102 |
| Year of Observation | 1934. AD |
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