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Procyon A is a bright F5IV star in a binary system. Although the distance,mass and angular diameter of this star are all known with high precision, theexact evolutionary state is still unclear. Evolutionary tracks with differentages and different mass fractions of hydrogen in the core pass, within theerrors, through the observed position of Procyon A in the Hertzsprung-Russelldiagram. For more than 15 years several different groups have studied thesolar-like oscillations in Procyon A to determine its evolutionary state.Although several studies independently detected power excess in theperiodogram, there is no agreement on the actual oscillation frequencies yet.This is probably due to either insufficient high-quality data (i.e., aliasing)or due to intrinsic properties of the star (i.e., short mode lifetimes). Now aspectroscopic multi-site campaign using 10 telescopes world-wide (minimizingaliasing effects) with a total time span of nearly 4 weeks (increase thefrequency resolution) is performed to identify frequencies in this star andfinally determine its properties and evolutionary state.

Oscillations in Procyon A: First results from a multi-site campaign