Beta Pegasi
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| Observation data Epoch J2000 |
|
|---|---|
| Constellation (pronunciation) |
Pegasus |
| Right ascension | 23h 03m 46.5s |
| Declination | +28° 04′ 58.0″ |
| Apparent magnitude (V) | 2.44 |
| Characteristics | |
| Spectral type | M2.5 II-III |
| U-B color index | 1.96 |
| B-V color index | 1.65 |
| Variable type | Lb |
| Astrometry | |
| Radial velocity (Rv) | 9 km/s |
| Proper motion (μ) | RA: 187.76 mas/yr Dec.: 137.61 mas/yr |
| Parallax (π) | 16.37 ± 0.72 mas |
| Distance | 199 ± 9 ly (61 ± 3 pc) |
| Absolute magnitude (MV) | -1.49 |
| Details | |
| Mass | ~6 M☉ |
| Radius | 95 R☉ |
| Luminosity | 9500 L☉ |
| Temperature | 16800 K |
| Metallicity | carbon |
| Rotation | ? |
| Age | ? years |
| Other designations | |
| Database references | |
| SIMBAD | data |
Beta Pegasi (β Peg / β Pegasi) is a star in the constellation Pegasus. Its traditional name is Scheat; confusingly, this name is also sometimes used for Delta Aquarii.
Scheat is unusual among bright stars in having a relatively cool surface temperature (3700 kelvins) compared to stars such as the Sun. Scheat is a red giant some 95 times as large as the Sun and has a total luminosity of 1500 times solar. It is also an irregular variable star, its brightness varying from magnitude +2.31 to +2.74.
