| Identification Data |
| Common Name | |
| Constellation | Perseus |
| Star Name | 31 Per |
| Skymap Number | 3190011 |
| Henry Draper (HD) Number | 20418 |
| Harvard Revised (HR) Number | 989 |
| SAO Number | 38714 |
| Durchmusterung (DM) Number | BD+49 902 |
Washington Double Stars (WDS) Number
|
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 28382 |
| Right Ascension (RA) J2000 | 3h 19m 7.638s |
| Declination (Dec) J2000 | +50° 5' 41.878" |
| Position Uncertainty | 0.0067s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.00233 |
| Proper Motion in Dec (J2000) | -0.025366 |
| Radial Velocity | +003.3km s-1 |
| Trigonometric Parallax | +0.00678s |
| Trigonometric Parallax Uncertainty | 0.00068s |
| GCI Unit Vector in X (J2000) | 0.414227 |
| GCI Unit Vector in Y (J2000) | 0.489857 |
| GCI Unit Vector in Z (J2000) | 0.767109 |
| Galactic Longitude | 145.74° |
Galactic Latitude
| -6.12°
|
| Observational Data |
| Observed Visual Magnitude (V) | 5.04 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.003 |
| Observed B Magnitude | 4.97 |
| Observed B-V Colour | -0.071 |
| 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 | 5.1 |
| Observed Photographic Magnitude | 4.9 |
| Morgan Keenan (MK) Spectral Type | B5V |
| One-Dimensional Spectral Class | B3 |
| Position Angle | |
| Year of Observation | AD |
