![]() 'n/a' means that a frequency estimate is not available. Rarity A measure of how infrequent the Earth close approach is for asteroids of the same size and larger: 0 means an average frequency of 100 per year, i.e., roughly every few days or less, 1 corresponds to roughly once a month, 2 to roughly once a year, 3 to roughly once a decade, etc. Diameter Diameter value when known or a range (min - max) estimated using the asteroid's absolute magnitude (H) and limiting albedos of 0.25 and 0.05. H (mag) Asteroid absolute magnitude (in general, smaller H implies larger asteroid diameter). V infinity ( km/s) Object velocity relative to a massless Earth at close-approach. V relative ( km/s) Object velocity relative to Earth at close-approach. ![]() The minimum possible distance is based on the 3-sigma Earth target-plane error ellipse. CA Distance Minimum ( au) The minimum possible close-approach distance (Earth center to NEO center), in astronomical units. ![]() CA Distance Nominal ( au) The most likely (Nominal) close-approach distance (Earth center to NEO center), in astronomical units. View CA Open the close-approach viewer and render the high-precision trajectory during the close approach. The 3-sigma uncertainty in the time is given in the +/- column in days_hours:minutes format (for example, "2_15:23" is 2 days, 15 hours, 23 minutes "< 00:01" is less than 1 minute). "Nominal Date" is given to appropriate precision. Object Object primary designation Close-Approach (CA) Date Date and time (TDB) of closest Earth approach.
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