code: def hourTable(date, pos):
      
      
      lastSunrise = ephem.lastSunrise(date, pos)
      middleSunset = ephem.nextSunset(lastSunrise, pos)
      nextSunrise = ephem.nextSunrise(date, pos)
      table = []
      
      # Create diurnal hour sequence
      length = (middleSunset.jd - lastSunrise.jd) / 12.0
      for i in range(12):
          start = lastSunrise.jd + i * length
          end = start + length
          ruler = nthRuler(i, lastSunrise.date.dayofweek())
          table.append([start, end, ruler])
          
      # Create nocturnal hour sequence
      length = (nextSunrise.jd - middleSunset.jd) / 12.0
      for i in range(12):
          start = middleSunset.jd + i * length
          end = start + length
          ruler = nthRuler(i + 12, lastSunrise.date.dayofweek())
          table.append([start, end, ruler])
          
      return table
docs: Creates the planetary hour table for a date 
      and position. 
      
      The table includes both diurnal and nocturnal 
      hour sequences and each of the 24 entries (12 * 2)
      are like (startJD, endJD, ruler).