We present results of new photometric observations of the contact binary system HI Pup as well as the radial velocity curve of the system .
Time series multicolour photometry was obtained at the South African Astronomical Observatory ( SAAO ) using the 1-m Cassegrain Telescope .
We applied a simultaneous solution to the BVRI light and radial velocity curves in order to determine the physical parameters of the system .
From an analysis of the new multicolour data , the physical parameters were found to be M _ { 1 } = 1.22 M _ { \odot } , M _ { 2 } = 0.23 M _ { \odot } , R _ { 1 } = 1.44 R _ { \odot } , R _ { 2 } = 0.67 R _ { \odot } , L _ { 1 } = 3.3 L _ { \odot } , L _ { 2 } = 0.7 L _ { \odot } .
Our solution confirms that HI Pup has a typical A–type W UMa binary system characteristics .