3e255347_logue_Format___Stellarium_Wiki_Star_Data_Record_Type_0_Type
[Name] sp_int [Offset] 11 [Size] 2 [Description] This is the index in an array of spectral type descriptions which is taken from the file stars_hip_sp.cat, the index corresponds to the line number in the file - 1 [Type] 
unsigned short int
i n t
u n s i g n e d c h a r
u n s i g n e d s h o r t i n t
Star Catalogue Format - Stellarium Wiki