Resumen
Using NANTEN ^{12} CO (J=1 → 0) observations (HPBW = 2'.7), we found a molecular cloud associated with the star forming regions RCW 121 and RCW 122. Kinematical properties, large scale distribution, and physical parameters were determined. Both RCW 121 and RCW 122, have very strong IR counterparts. New radiocontinuum fluxes determinations indicate that RCW 121 and RCW 122 are thermal in nature.
