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 |