astro.wikisort.org - Asteroid

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]

2001 YB₅

Designations
Minor planet category	Apollo NEO PHA
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]

References

External links

• 2001 YB5 at NeoDyS-2, Near Earth Objects—Dynamic Site
  • Ephemerides · Observation prediction · Orbital info · MOID · Proper elements · Observational info · Close approaches · Physical info · Orbit animation
• 2001 YB5 at ESA–space situational awareness
  • Ephemerides · Observations · Orbit · Physical properties · Summary
• 2001 YB5 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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