code: def _download_astorb(
              self):
          
          self.log.info('starting the ``_download_astorb`` method')
  
          # DOWNLOAD ASTORB
          url = self.settings["astorb"]["url"]
          print "Downloading orbital elements from '%(url)s'" % locals()
  
          response = urllib2.urlopen(url)
          data = response.read()
          astorbgz = "/tmp/astorb.dat.gz"
          file_ = open(astorbgz, 'w')
          file_.write(data)
          file_.close()
  
          print "Finished downloading orbital elements" % locals()
  
          self.log.info('completed the ``_download_astorb`` method')
          return astorbgz
docs: *download the astorb database file*
  
          **Key Arguments:**
              - ``astorbgz`` -- path to the downloaded astorb database file