| Identification Data |
| Common Name | |
| Constellation | Cygnus |
| Star Name | 65tau Cyg |
| Skymap Number | 21140150 |
| Henry Draper (HD) Number | 202444 |
| Harvard Revised (HR) Number | 8130 |
| SAO Number | 71121 |
| Durchmusterung (DM) Number | BD+37 4240 |
Washington Double Stars (WDS) Number
| 21148+3803
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 400283 |
| Right Ascension (RA) J2000 | 21h 14m 47.491s |
| Declination (Dec) J2000 | +38° 2' 43.141" |
| Position Uncertainty | 0.0060s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.01657 |
| Proper Motion in Dec (J2000) | +0.410067 |
| Radial Velocity | -021.1km s-1 |
| Trigonometric Parallax | +0.04780s |
| Trigonometric Parallax Uncertainty | 0.00061s |
| GCI Unit Vector in X (J2000) | 0.591619 |
| GCI Unit Vector in Y (J2000) | -0.519789 |
| GCI Unit Vector in Z (J2000) | 0.616285 |
| Galactic Longitude | 82.85° |
Galactic Latitude
| -7.43°
|
| Observational Data |
| Observed Visual Magnitude (V) | 3.74 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.002 |
| Observed B Magnitude | 4.14 |
| Observed B-V Colour | +0.404 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.003 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 3.8 |
| Observed Photographic Magnitude | 4.1 |
| Morgan Keenan (MK) Spectral Type | F2IV |
| One-Dimensional Spectral Class | F0 |
| Position Angle | |
| Year of Observation | 1993. AD |
