Energy distribution asymmetry of electron precipitation signatures at Mars

► We use ASPERA-3 to classify particle asymmetries during electron precipitation at Mars. ► Most common type of energy distribution is of isotropic electrons and upward heavy-ions. ► Distributions suggesting upward currents observed four times more than downward currents. ► Heavy-ion flow at Mars mostly unaffected by electron precipitation due to finite gyro-radius. ► Acceleration of heavy-ions is rarely observed during electron precipitation.