Omicron Orionis refers to two distinct star systems in the constellation Orion:
- ο1 Orionis (4 Orionis), an M3S semiregular variable star
- ο2 Orionis (9 Orionis), a K2 giant star
All of them were member of asterism 參旗 (Sān Qí), Banner of Three Stars, Net mansion.[1]