Omicron Orionis
Omicron Orionis refers to 2 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]
See also
    
o Orionis (22 Orionis)
References
    
    
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