Pegasus range

Gamma Pegasi (γ Pegasi / γ Peg / 88 Pegasi) is the fourth brightest star in the Pegasus constellation with apparent magnitude +2.83. Within the constellation it is surpassed in brightness by Enif (ε Pegasi), Scheat (β Pegasi) and Markab (α Pegasi), being one of the four stars that form the asterism of the quadrant of Pegaso. It receives the traditional name of Algenib, from the Arabic الجنب al-janb or الجانب al-jānib ("the side"), name that can be misleading since it is also used to designate the star α Persei.

Gamma Pegasi is a blue subgiant star of spectral type B2IV located 333 light years from the Solar System. With a surface temperature of 21,500 K, its radius is 4.5 times greater than the solar radius. Considering a significant amount of energy emitted as ultraviolet radiation, its luminosity is equivalent to 4000 soles.

Gamma Pegasi is a Beta Cephei variable star, with Murzim (β Canis Majoris) and Hadar (β Centauri) two of the brightest stars in this group. These stars, whose variation is due to pulsations in their surface, present small variations of brightness. The brightness of Gamma Pegasi oscillates 0.09 magnitudes in a short period of 3.6 hours. Also, Gamma Pegasi is a spectroscopic binary, with an orbital period of 6.83 days; the accompanying star, of which nothing is known, can be found at 0.15 AU from the main star.

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