The Bayer designation θ Orionis is shared by several astronomical objects, located near RA 05h 35m DEC −05° 24′: θ1 Orionis, the Trapezium Cluster, an open star cluster, the Orion OB Association 1d θ1 Orionis A, a trinary star system θ1 Orionis B, a quintet star system θ1 Orionis B West, an astronomical X-ray source θ1 Orionis B East, an astronomical X-ray source θ1 Orionis C, a binary star system θ1 Orionis D, a B0. Wikipedia