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]

o Orionis (22 Orionis)