Q:  What is the corrected apparent magnitude of HV 2274?

          
           The extinction in V-band is

                A_v           =       R  *  E(B-V)

                              =     3.1  *   0.12

                              =     0.37  mag
 


           corrected app mag  =  (observed app mag)  -  (extinction)

                              =      14.16           -    0.37

               m_v,0          =      13.79
 


  Q:  Use this value, and the absolute magnitude, to compute the
           distance modulus and distance to the Large Magellanic Cloud.


           The distance modulus is

             (m_v,0 - M_v)    =      13.79    -    ( -4.58 )

                              =      18.37 


           And so the distance to the LMC is


                                       0.2 * ( [m-M] + 5 ) 
                dist          =     10

                              =     47.2 kpc