Beta Pegasi
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Pegasus |
| Right ascension | 23h 03m 46.45746s |
| Declination | +28° 04′ 58.0336″ |
| Apparent magnitude (V) | 2.42 (2.31 – 2.74) |
| Characteristics | |
| Evolutionary stage | AGB |
| Spectral type | M2.5II–IIIe |
| U−B color index | +1.96 |
| B−V color index | +1.67 |
| Variable type | Semi-regular |
| Astrometry | |
| Radial velocity (Rv) | +8.7 km/s |
| Proper motion (μ) | RA: +187.65 mas/yr Dec.: +136.93 mas/yr |
| Parallax (π) | 16.64±0.15 mas |
| Distance | 196 ± 2 ly (60.1 ± 0.5 pc) |
| Absolute magnitude (MV) | −1.41 |
| Details | |
| Mass | 1.7±0.3 M☉ |
| Radius | 109±7 R☉ |
| Luminosity | 1,644 L☉ |
| Surface gravity (log g) | 1.20 cgs |
| Temperature | 3,606 K |
| Metallicity [Fe/H] | −0.11 dex |
| Rotational velocity (v sin i) | 9.7 km/s |
| Other designations | |
| Scheat, 53 Pegasi, HR 8775, BD+27°4480, HD 217906, SAO 90981, FK5 870, HIP 113881 | |
| Database references | |
| SIMBAD | data |
Beta Pegasi (β Pegasi, abbreviated Beta Peg, β Peg), formally named Scheat /ˈʃiːæt/, is a red giant star and the second-brightest star (after Epsilon Pegasi) in the constellation of Pegasus. It forms the upper right corner of the Great Square of Pegasus, a prominent rectangular asterism.