hip-74975

Its story

5 Serpentis is a white-yellow F-type subgiant 83 light-years away, classed as a Delta Scuti variable: its brightness ripples by tiny amounts with a period of just 0.16 days, ultra-fast pulses that asteroseismology uses to peer beneath its surface. It anchors a system of fainter companions and lies in the mythic head of the Serpent —one of only two constellations split into two separate halves across the sky—.