| Identification Data |
| Common Name | |
| Constellation | Cygnus |
| Star Name | 66ups Cyg |
| Skymap Number | 21170173 |
| Henry Draper (HD) Number | 202904 |
| Harvard Revised (HR) Number | 8146 |
| SAO Number | 71173 |
| Durchmusterung (DM) Number | BD+34 4371 |
Washington Double Stars (WDS) Number
| 21179+3454
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 86342 |
| Right Ascension (RA) J2000 | 21h 17m 55.076s |
| Declination (Dec) J2000 | +34° 53' 48.832" |
| Position Uncertainty | 0.0048s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.00097 |
| Proper Motion in Dec (J2000) | +0.006966 |
| Radial Velocity | -003.km s-1 |
| Trigonometric Parallax | +0.00362s |
| Trigonometric Parallax Uncertainty | 0.00056s |
| GCI Unit Vector in X (J2000) | 0.623481 |
| GCI Unit Vector in Y (J2000) | -0.532889 |
| GCI Unit Vector in Z (J2000) | 0.572101 |
| Galactic Longitude | 80.98° |
Galactic Latitude
| -10.05°
|
| Observational Data |
| Observed Visual Magnitude (V) | 4.42 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.008 |
| Observed B Magnitude | 4.31 |
| Observed B-V Colour | -0.106 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.009 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 4.4 |
| Observed Photographic Magnitude | |
| Morgan Keenan (MK) Spectral Type | B2Vne |
| One-Dimensional Spectral Class | B3 |
| Position Angle | 220 |
| Year of Observation | 1961. AD |
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