Lambda Pegasi, also named Ligong, is a fourth-magnitude star in the constellation Pegasus. It lies near Mu Pegasi, to the southwest of the brighter Beta Pegasi (Scheat).
Nomenclature Lambda Pegasi (Latinized from λ Pegasi, abbreviated λ Peg) is the star's Bayer designation. It traditionally shared the Arabic name Sadalbari with Mu Pegasi.
In Chinese astronomy, this star is part of the constellation Ligong (), representing a secondary or temporary palace. The IAU Working Group on Star Names adopted the name Ligong for this star on 13 August 2026, after this Chinese constellation.
Properties λ Pegasi is a yellow giant with stellar classification G8II-III. With a mass of and radius that is , the star boasts a bolometric luminosity that is roughly . Its apparent magnitude was calibrated in 1983 at 3.96, yielding an absolute magnitude of -1.45. Parallax calculations place the star at a distance of roughly 112 parsecs from Earth, or 365 ± 10 light years away, about three times the distance of its line-of-sight double μ Pegasi.
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