| Identification Data |
| Common Name | |
| Constellation | Cygnus |
| Star Name | 81pi 2Cyg |
| Skymap Number | 21460148 |
| Henry Draper (HD) Number | 207330 |
| Harvard Revised (HR) Number | 8335 |
| SAO Number | 51293 |
| Durchmusterung (DM) Number | BD+48 3504 |
Washington Double Stars (WDS) Number
|
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 62016 |
| Right Ascension (RA) J2000 | 21h 46m 47.607s |
| Declination (Dec) J2000 | +49° 18' 34.463" |
| Position Uncertainty | 0.0076s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.00037 |
| Proper Motion in Dec (J2000) | -0.001967 |
| Radial Velocity | -012.3km s-1 |
| Trigonometric Parallax | +0.00282s |
| Trigonometric Parallax Uncertainty | 0.00052s |
| GCI Unit Vector in X (J2000) | 0.544913 |
| GCI Unit Vector in Y (J2000) | -0.357963 |
| GCI Unit Vector in Z (J2000) | 0.758243 |
| Galactic Longitude | 94.84° |
Galactic Latitude
| -3.22°
|
| Observational Data |
| Observed Visual Magnitude (V) | 4.25 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.002 |
| Observed B Magnitude | 4.12 |
| Observed B-V Colour | -0.127 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.002 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 4.3 |
| Observed Photographic Magnitude | |
| Morgan Keenan (MK) Spectral Type | B3III |
| One-Dimensional Spectral Class | B3 |
| Position Angle | 113 |
| Year of Observation | 1991. AD |
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