| Identification Data |
| Common Name | |
| Constellation | Vulpecula |
| Star Name | 31 Vul |
| Skymap Number | 20520027 |
| Henry Draper (HD) Number | 198809 |
| Harvard Revised (HR) Number | 7995 |
| SAO Number | 89228 |
| Durchmusterung (DM) Number | BD+26 4017 |
Washington Double Stars (WDS) Number
|
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 112044 |
| Right Ascension (RA) J2000 | 20h 52m 7.678s |
| Declination (Dec) J2000 | +27° 5' 49.126" |
| Position Uncertainty | 0.0068s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.00542 |
| Proper Motion in Dec (J2000) | -0.061066 |
| Radial Velocity | +001.0km s-1 |
| Trigonometric Parallax | +0.01506s |
| Trigonometric Parallax Uncertainty | 0.00060s |
| GCI Unit Vector in X (J2000) | 0.607504 |
| GCI Unit Vector in Y (J2000) | -0.650739 |
| GCI Unit Vector in Z (J2000) | 0.455498 |
| Galactic Longitude | 71.31° |
Galactic Latitude
| -10.98°
|
| Observational Data |
| Observed Visual Magnitude (V) | 4.57 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.002 |
| Observed B Magnitude | 5.40 |
| Observed B-V Colour | +0.832 |
| 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 | 4.8 |
| Observed Photographic Magnitude | 5.5 |
| Morgan Keenan (MK) Spectral Type | G7IIIFe-1 |
| One-Dimensional Spectral Class | G5 |
| Position Angle | |
| Year of Observation | AD |
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