2001 YB5

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2001 YB5
Apollo, NEO, PHA
Orbital characteristics
Aphelion 4.37139
Perihelion 0.31986
Eccentricity 0.863633
3.59 yr
1312.163 days

2001 YB5 is an Apollo near-Earth asteroid that passed a nominal distance of 0.0043767 AU (654,750 km; 406,840 mi) from the Moon and 0.0055633 AU (832,260 km; 517,140 mi) from Earth on 2002-Jan-07.[1] The asteroid was approximately 300 meters in diameter; insignificant enough in size to be only discovered later that year in December 26, 2002 by NASA's Near-Earth Asteroid Tracking program (NEAT).[2][3][4] The nearest proximity it has reached Earth by was 830,000 kilometres which is approximately twice the distance to the Moon.[4] Based on limited observations, the asteroid may have a 2.5 hour rotation period and a Minimum Orbit Intersection Distance (MOID) from the Earth of 0.0038 AU (570,000 km; 350,000 mi).[1] The findings of David Morrison of the NASA Ames Research Center claim that although YB5-sized objects in space commonly fly and orbit the Earth's proximity at such close distances annually, there are no indications of a YB5 collision on Earth as their predicted impact spans from about once every 20,000 to 30,000 years.[4]


  1. ^ a b JPL/NASA 19:45 11.10.11
  2. ^ "Large Asteroid Passes Close to Earth". neat.jpl.nasa.gov. Retrieved 2016-01-27. 
  3. ^ Huge Asteroid Narrowly Misses Earth
  4. ^ a b c "Repeated Blows: Rough Neighbourhoods" (PDF). www.nature.com.myaccess.library.utoronto.ca. Luann Becker. Retrieved 2016-01-27. 

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