THE PALERMO TECHNICAL IMPACT HAZARD SCALE 
   The Palermo Technical Impact Hazard Scale was developed to enable NEO
   Actual scale values less than -2 reflect events for which there are no
      likely consequences, while Palermo Scale values between -2 and 0
   with positive Palermo Scale values will generally indicate situations
     The scale compares the likelihood of the detected potential impact
    the scale is logarithmic, so, for examples, a Palermo Scale value of
   The primary reference for the Palermo Technical Scale is a scientific
                 PALERMO SCALE FREQUENTLY ASKED QUESTIONS 
   How is the Palermo Scale different from the Torino Scale?
   The [18]Torino Scale is designed to communicate to the public the risk
   scale, which has integer values from 0 to 10, takes into consideration
   Scale is used by specialists in the field to quantify in more detail
   possibility. Much of the utility of the Palermo Scale lies in its
   Scale 0 events, which comprise nearly all of the potential impacts
   Scale values in order to assess the degree to which they should
   scale is continuous (both positive and negative values are allowed)
   NEA rises above the background level (the Palermo Scale value is then
   How does one convert from one scale to the other?
   Since the Palermo Scale is continuous and it depends upon the number
   the background level, it will achieve both a Palermo and Torino Scale
   How exactly is the Palermo Scale value computed?
   The Palermo Scale is the base-10 logarithm of the relative risk.
   And what about the cumulative Palermo Scale value?
   The cumulative Palermo Scale value reflects the seriousness of the