| Observation data Epoch J2000.0 Equinox J2000.0 |
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|---|---|
| Constellation | Pegasus |
| Right ascension | 00h 13m 14.2s |
| Declination | +15° 11' 01" |
| Apparent magnitude (V) | +2.83 |
| Distance | 335 ly (103 pc) |
| Spectral type | B2IV |
| Other designations | |
Gamma Pegasi (γ Peg) is a star in the constellation of Pegasus. It also has the traditional name Algenib; confusingly however, this name is also used for Alpha Persei.
The asterism of γ Pegasi and α Andromedae, in Hindu astronomy, is called Uttara Bhādrapadā (उत्तरभाद्रपदा) or Uttṛṭṭāti. It is the 26th nakshatra. In Chinese, 壁宿 (Bì Sù), meaning Wall (asterism) refers to an asterism consisting of γ Pegasi and α Andromedae .[1] Consequently, γ Pegasi itself is known as 壁宿一 (Bì Sù yī, English: the First Star of Wall.)[2]
Gamma Pegasi is a Beta Cephei variable star that lies at the lower left-hand corner of the Great Square of Pegasus. Its magnitude varies between +2.78 and +2.89 with a period of 3.6 hours. It is 335 light-years distant and belongs to spectral type B2. It has a total luminosity of 4000 times that of the Sun with a radius of 4.5 times solar. The mass of γ Pegasi is 7 to 10 solar masses.
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