5 Aquilae

5 Aquilae (5 Aql) is a star located in the constellation Aquila. It is a variable star, specifically classified as a Delta Scuti variable. Delta Scuti variables are pulsating stars, meaning their brightness varies due to radial and non-radial pulsations of their surface.

Located approximately 294 light-years from Earth, 5 Aquilae is a relatively bright star, visible to the naked eye under favorable observing conditions. Its apparent magnitude ranges from approximately 5.83 to 5.91, with a period of roughly 0.143 days (about 3 hours and 25 minutes). The variability in its brightness is caused by the expansion and contraction of the star's outer layers.

Spectroscopically, 5 Aquilae is an F-type star, indicating a surface temperature warmer than the Sun. Its spectral type is F6 IV-V, suggesting it's a star that is slightly more evolved than a main-sequence star. This classification hints that the star is possibly in a transition phase, leaving the main sequence as it evolves into a giant star.

Studies of 5 Aquilae have contributed to our understanding of stellar pulsation mechanisms and the evolution of intermediate-mass stars. Its proximity and relatively short pulsation period make it a valuable target for asteroseismological studies, which aim to probe the internal structure of stars through the analysis of their oscillations.