is Delta Scuti (δ Sct), which exhibits brightness fluctuations from +4.60 to +4.79 in apparent magnitude with a period of 4.65 hours. Other well known Delta Scuti variables include Altair, Denebola (β Leonis) and β Cassiopeiae. Vega (α Lyrae) is a suspected Delta Scuti variable, but this remains unconfirmed. Examples Other examples include - σ Octantis and β Cassiopeiae References Further reading Samus N.N., Durlevich O.V., et al. Combined General Catalog of Variable Stars (GCVS4.2, 2004 Ed.) AI Velorum star at The Encyclopedia of Astrobiology, Astronomy, and Spaceflight AAVSO: Delta Scuti and the Delta Scuti variables Cepheid variables