All published measurements of the absolute value of the sky projected spin–orbit angle |λ| (top panel) and true spin–orbit angle Ψ (bottom panel) as a function of T_eff, according to TEPCat. All planets with measurements of Ψ with T_eff > 7000 K are marked specifically. In cases where more than one measurement exists for a given planet, they are all shown. Some values of λ were converted to fall in the range − 180 < λ < 180 deg.