en.wikipedia.org/wiki/Palermo_Technical_Impact_Hazard_Scale

The Palermo Technical Impact Hazard Scale is a logarithmic scale used by astronomers to rate the potential hazard of impact of a near-earth object (NEO).

en.wikipedia.org/wiki/Torino_scale

The Torino Scale is a method for categorizing the impact hazard associated with near-Earth ... and known kinetic damage potentials into a single threat value. The Palermo Technical Impact Hazard Scale is a similar, but more complex scale.

cneos.jpl.nasa.gov/sentry/palermo_scale.html

The Palermo Technical Impact Hazard Scale was developed to enable NEO specialists to categorize and prioritize potential impact risks spanning a wide range ...

cneos.jpl.nasa.gov/sentry

Potential Impacts, Impact Probability (cumulative), Vinfinity (km/s), H (mag), Estimated Diameter (km), Palermo Scale (cum.) Palermo Scale (max.) Torino Scale

spaceguard.rm.iasf.cnr.it/tumblingstone/issues/num11/eng/palermo.htm

Quantifying a risk is not an easy problem, in any field. An example over all: how dangerous can a car, running on a certain road, be? Obviously, the answer ...

www.worldwidewords.org/turnsofphrase/tp-pal1.htm

Aug 31, 2002 ... Palermo scale. If you were paying close attention recently, you may have heard a report flash past that the Earth was going to be hit by an ...

www.revolvy.com/page/Palermo-Technical-Impact-Hazard-Scale

The Palermo Technical Impact Hazard Scale is a logarithmic scale used by astronomers to rate the potential hazard of impact of a near-earth object (NEO).

dictionary.obspm.fr/index.php?showAll=1&formSearchTextfield=Palermo+scale

A technical scale that categorizes the → impact hazard of a → near-Earth object ( NEO). It compares the threat of a given NEO to the so-called background threat ...

io9.gizmodo.com/how-serious-does-an-asteroid-threat-have-to-be-before-w-5921392

Jun 26, 2012 ... The Palermo Scale looks at all NEOs in the Earth's vicinity and prioritizes them according to the degree that scientists feel they deserve our ...