code: def jhk_to_vmag(jmag,hmag,kmag):
      '''Converts given J, H, Ks mags to a V magnitude value.
  
      Parameters
      ----------
  
      jmag,hmag,kmag : float
          2MASS J, H, Ks mags of the object.
  
      Returns
      -------
  
      float
          The converted V band magnitude.
  
      '''
  
      return convert_constants(jmag,hmag,kmag,
                               VJHK,
                               VJH, VJK, VHK,
                               VJ, VH, VKf jhk_to_vmag(jmag,hmag,kmag):
      '''Converts given J, H, Ks mags to a V magnitude value.
  
      Parameters
      ----------
  
      jmag,hmag,kmag : float
          2MASS J, H, Ks mags of the object.
  
      Returns
      -------
  
      float
          The converted V band magnitude.
  
      '''
  
      return convert_constants(jmag,hmag,kmag,
                               VJHK,
                               VJH, VJK, VHK,
                               VJ, VH, VK)
docs: Converts given J, H, Ks mags to a V magnitude value.
  
      Parameters
      ----------
  
      jmag,hmag,kmag : float
          2MASS J, H, Ks mags of the object.
  
      Returns
      -------
  
      float
          The converted V band magnitude.