Absolute value of the projected obliquity, β, as a function of the orbital periods for planets with measured obliquity. HIP41378 d is highlighted with a red circle. Planets that are part of multiple systems are represented as a square and the other with a circle. The size of the marker is scaled with the radius of the planet in Jupiter radius. The effective temperature of the host stars is represented by a colour gradient with red corresponding to relatively cool stars and blue to hot stars.