Tags: Star.
25 Orionis less commonly known by its Bayer designation Psi1 Orionis (Ψ1 Orionis Ψ1 Ori) is a fifth-magnitude star in the constellation Orion. Its kinematics place it among a dense cluster of almost 200 low-mass pre-main-sequence stars in the Orion OB1a subassociation known as the 25 Orionis group.
