hip-99738

Its story

21 Vulpeculae is a white A-type variable at the heart of small Vulpecula, hidden near the famous Coathanger asterism (Brocchi's Cluster). It glows 297 light-years away with the cool, clean light typical of A-type stars, whose spectra are dominated by hydrogen lines. Its subtle variability earned it a place in specialised catalogues, even if to the naked eye it looks like just another faint point in that stretch of the summer sky.