diff --git a/csst_mci_sim/csst_mci_sim.py b/csst_mci_sim/csst_mci_sim.py
index fe89ccd0d26d0b9b57b35548515314fd42f8c6ac..25718c68f932d1b58f89a87b881589d03215e0b9 100644
--- a/csst_mci_sim/csst_mci_sim.py
+++ b/csst_mci_sim/csst_mci_sim.py
@@ -1735,12 +1735,9 @@ class MCIsimulator():
         
         df3.index = range(len(df3))
         
-        
         # np.save('umag.npy', df3['umag'] )
-
-        
         self.star=df3
-        del df0,df2,df3
+        del da,df2,df3
         
         self.information['ra_obj']  = self.star['ra_gaia'].mean() 
         self.information['dec_obj'] = self.star['dec_gaia'].mean()