2001 YB5 is a sub-kilometer asteroid, classified as near-Earth object and potentially hazardous asteroid of the Apollo group that passed at 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 7 January 2002.[1]
Designations | |
---|---|
Minor planet category |
|
Orbital characteristics[1] | |
Epoch 13 January 2016 (JD 2457400.5) | |
Uncertainty parameter 7 | |
Aphelion | 4.36299 AU (652.694 Gm) |
Perihelion | 0.316468 AU (47.3429 Gm) |
Semi-major axis | 2.339727 AU (350.0182 Gm) |
Eccentricity | 0.864742 |
Orbital period (sidereal) | 3.58 yr (1307.2 d) |
Mean anomaly | 313.434° |
Mean motion | 0° 16m 31.422s / day |
Inclination | 5.54537° |
Longitude of ascending node | 108.444° |
Argument of perihelion | 115.206° |
Earth MOID | 0.00382892 AU (572,798 km) |
Jupiter MOID | 0.698703 AU (104.5245 Gm) |
Physical characteristics | |
Synodic rotation period | 2.5 h (0.10 d) |
Absolute magnitude (H) | 20.9 |
The asteroid measures approximately 300 meters in diameter; insignificant enough in size to be only discovered later that year on 26 December 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]
Small Solar System bodies | |||||||
---|---|---|---|---|---|---|---|
Minor planets |
| ||||||
Comets |
| ||||||
Other |
|