The Torino scale is defined only for potential impacts less than 100 years in the future. Torino Scale (max.) Maximum detected hazard rating according to the Torino impact hazard scale, based on the tabulated impact probability and impact energy. Palermo Scale (max.) Maximum hazard rating according to the Palermo technical impact hazard scale, based on the tabulated impact date, impact probability and impact energy. Palermo Scale (cum.) Cumulative hazard rating according to the Palermo technical impact hazard scale, based on the tabulated impact date, impact probability and impact energy. Since the albedo is rarely known for objects on this page, the diameter estimate should be considered only approximate, but in most cases will be accurate to within a factor of two. This is an estimate based on the absolute magnitude, usually assuming a uniform spherical body with visual albedo pV = 0.154 (in accordance with the Palermo Scale) but sometimes using actual measured values if these are available. Estimated Diameter (km) Estimated diameter of the asteroid. It is the apparent magnitude of the object when it is 1 au from both the sun and the observer, and at full phase for the observer. H (mag) Absolute Magnitude, a measure of intrinsic brightness. Tech & Science Watch Live As Asteroid Passes 'Very Close' by Earth By Ed Browne On 4/5/22 at 5:08 AM EDT Share Tech & Science Science Space Astronomy Meteor An asteroid is due to make a. V infinity (km/s) Velocity of the asteroid relative to the Earth, assuming a massless Earth. Impact Probability (cumulative) Sum of the impact probabilities from all detected potential impacts. There can be several qualitatively unique pathways to impact in a given year, e.g., some with an extra revolutions around the sun, others deflected to impact by an earlier planetary encounter. Potential Impacts Number of dynamically distinct potential impacts that have been detected by Sentry. Typically, searches are conducted 100 years into the future. Year Range Time span over which impacts have been detected. Object Designation Temporary designation or permanent number for this object. All other colors (green, yellow, orange, and red) represent their respective Torino scale. White or gray colors indicate a Torino scale of 0 or undefined. A light-blue color indicates a small object (estimated diameter of 50 meters or less). Small objects are not likely to cause significant damage in the event of an impact, although impact damage does depend heavily upon the specific (and usually unknown) physical properties of the object in question. Coloration The color of the table row gives a rough interpretation of the severity of the threat.
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