| Identification Data |
| Common Name | |
| Constellation | Pegasus |
| Star Name | 57 Peg |
| Skymap Number | 23090082 |
| Henry Draper (HD) Number | 218634 |
| Harvard Revised (HR) Number | 8815 |
| SAO Number | 128001 |
| Durchmusterung (DM) Number | BD+07 4981 |
Washington Double Stars (WDS) Number
| 23095+0841
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 173803 |
| Right Ascension (RA) J2000 | 23h 9m 31.457s |
| Declination (Dec) J2000 | +8° 40' 37.778" |
| Position Uncertainty | 0.0113s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.00025 |
| Proper Motion in Dec (J2000) | -0.004566 |
| Radial Velocity | +015.7km s-1 |
| Trigonometric Parallax | +0.00428s |
| Trigonometric Parallax Uncertainty | 0.00088s |
| GCI Unit Vector in X (J2000) | 0.964675 |
| GCI Unit Vector in Y (J2000) | -0.215965 |
| GCI Unit Vector in Z (J2000) | 0.150867 |
| Galactic Longitude | 84.79° |
Galactic Latitude
| -46.51°
|
| Observational Data |
| Observed Visual Magnitude (V) | 5.03 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.053 |
| Observed B Magnitude | 6.51 |
| Observed B-V Colour | +1.48 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.009 |
| Observed U Magnitude | 7.66 |
| Observed U-B Colour | +1.15 |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | 0.074 |
| Observed Photovisual Magnitude | 5.4 |
| Observed Photographic Magnitude | 6.4 |
| Morgan Keenan (MK) Spectral Type | M4IIIS+A2V |
| One-Dimensional Spectral Class | Mb |
| Position Angle | 198 |
| Year of Observation | 1982. AD |
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