- The color of the table entries gives a rough interpretation of the severity of the threat. 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.
||Torino Scale Colors|
|Estimated diameter 50 meters or less.
- Object Designation
- Temporary designation or permanent number for this object. Assigned by the Minor Planet Center.
- Year Range
- Time span over which impacts have been detected. Typically, searches are conducted 100 years into the future.
- Potential Impacts
- The number of dynamically distinct potential impacts that have been detected by Sentry. 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.
- Impact Prob. (cum.)
- The sum of the impact probabilities from all detected potential impacts.
- The velocity of the asteroid relative to the Earth, assuming a massless Earth.
- Absolute Magnitude is an intrinsic measure of brightness. 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.
- Est. Diam.
- The estimated diameter of the asteroid. 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. 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
- Palermo Scale (cum.) & (max.)
- The cumulative and maximum hazard ratings according to the Palermo Technical Impact Hazard Scale.
- Torino Scale (max.)
- The maximum detected hazard rating using the Torino Impact Hazard Scale. According to this ten-point scale, a rating of zero indicates the event has "no likely consequences." A Torino Scale rating
of 1 indicates an event that "merits careful monitoring." Even higher ratings indicate that progressively more concern is
warranted. The Torino Scale is defined only for potential impacts less than 100 years in the future.